/*
Theme Name: Shangdatong
Theme URI: https://shangdatong.com
Author: Shangdatong
Description: Corporate group brand theme for 北京互联商通科技有限公司. Full-bleed hero carousel, sticky transparent header, product matrix, scroll reveal, WebP/lazy images.
Version: 2.0.0
Requires at least: 6.0
Tested up to: 7.1
Requires PHP: 8.0
Text Domain: shangdatong
*/

:root {
  --font-size: 100%;
  --devdiy-color-grey-100: #fafafa;
  --devdiy-color-grey-150: #f2f3f3;
  --devdiy-color-grey-200: #eaeded;
  --devdiy-color-grey-300: #d5dbdb;
  --devdiy-color-grey-400: #aab7b8;
  --devdiy-color-grey-450: #95a5a6;
  --devdiy-color-grey-500: #879596;
  --devdiy-color-grey-550: #687078;
  --devdiy-color-grey-600: #545b64;
  --devdiy-color-grey-650: #414750;
  --devdiy-color-grey-700: #2a2e33;
  --devdiy-color-grey-750: #21252c;
  --devdiy-color-grey-800: #1a2029;
  --devdiy-color-grey-900: #16191f;
  --devdiy-color-grey-950: #222;
  --devdiy-color-grey-transparent-heavy: rgba(0,28,36,0.5);
  --devdiy-color-grey-transparent: rgba(0,28,36,0.3);
  --devdiy-color-grey-transparent-light: rgba(0,28,36,0.15);
  --devdiy-color-blue-100: #f1faff;
  --devdiy-color-blue-300: #99cbe4;
  --devdiy-color-blue-400: #44b9d6;
  --devdiy-color-blue-500: #00a1c9;
  --devdiy-color-blue-600: #0073bb;
  --devdiy-color-blue-700: #0a4a74;
  --devdiy-color-blue-900: #12293b;
  --devdiy-color-green-100: #f2f8f0;
  --devdiy-color-green-300: #a5d099;
  --devdiy-color-green-500: #6aaf35;
  --devdiy-color-green-600: #1d8102;
  --devdiy-color-green-700: #1a520f;
  --devdiy-color-green-900: #172211;
  --devdiy-color-red-500: #ff5d64;
  --devdiy-color-red-600: #d13212;
  --devdiy-color-black: #000;
  --devdiy-color-white: #fff;
  --devdiy-color-aws-squid-ink: #064E3B;
  --devdiy-color-amazon-orange: #008060;
  --devdiy-motion-duration-fast: 90ms;
  --devdiy-motion-duration-moderate: 135ms;
  --devdiy-motion-duration-extra-slow: 270ms;
  --devdiy-motion-easing-ease-out-quart: cubic-bezier(0.165,0.84,0.44,1);
  --devdiy-color-text-body-default: #16191f;
  --devdiy-color-text-body-secondary: #545b64;
  --devdiy-color-text-heading-default: #16191f;
  --devdiy-color-text-secondary: #545b64;
  --devdiy-color-text-small: #687078;
  --devdiy-color-background-layout-main: #f2f3f3;
  --devdiy-color-border-divider-default: #eaeded;
  --devdiy-color-border-layout: #d5dbdb;
  --devdiy-color-shadow-default: rgba(0,28,36,0.5);
  --devdiy-color-shadow-medium: rgba(0,28,36,0.3);
  --devdiy-color-shadow-side: rgba(0,28,36,0.15);

  --devdiy-content-max: 1440px;
  --devdiy-page-inline: 80px;
  --devdiy-section-pad-y: 45px;
  --shangdatong-primary: #008060;
  --shangdatong-primary-hover: #006B4F;
  --shangdatong-ink: #064E3B;
  --shangdatong-header-h: 68px;
  --shangdatong-accent: #00a1c9;
}

@media (max-width: 768px) {
  :root {
    --devdiy-page-inline: 16px;
    --devdiy-section-pad-y: 36px;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--devdiy-color-text-body-default, #16191f);
  background: var(--devdiy-color-white, #fff);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--devdiy-color-blue-600, #0073bb); }
h1, h2, h3, h4 { line-height: 1.3; }

.shangdatong-page { margin: 0; width: 100%; }
.shangdatong-shell {
  width: 100%;
  max-width: var(--devdiy-content-max, 1440px);
  margin: 0 auto;
  padding-inline: var(--devdiy-page-inline, 80px);
}

/* ============ Sticky header ============ */
.shangdatong-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  color: #fff;
  background: transparent;
  transition: background 0.35s ease, color 0.35s ease, box-shadow 0.35s ease;
}
.shangdatong-header.is-solid {
  background: rgba(255, 255, 255, 0.96);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: var(--devdiy-color-text-body-default, #16191f);
  box-shadow: 0 2px 16px rgba(0, 28, 36, 0.10);
}
body.sdt-solid-header .shangdatong-header {
  background: rgba(255, 255, 255, 0.96);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: var(--devdiy-color-text-body-default, #16191f);
  box-shadow: 0 2px 16px rgba(0, 28, 36, 0.10);
}
.shangdatong-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: var(--shangdatong-header-h, 68px);
}
.shangdatong-header a { color: inherit; text-decoration: none; }
.shangdatong-logo {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 1.5rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.shangdatong-logo small {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  opacity: 0.72;
}
.shangdatong-nav { display: flex; }
.shangdatong-nav ul {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.shangdatong-nav li { position: relative; }
.shangdatong-nav > ul > li { position: static; }
.shangdatong-nav a {
  display: inline-block;
  padding: 0.5rem 0.9rem;
  font-size: 0.98rem;
  font-weight: 500;
  border-radius: 6px;
  opacity: 0.92;
  transition: opacity 0.2s ease, background 0.2s ease;
}
.shangdatong-nav a:hover,
.shangdatong-nav .current-menu-item > a,
.shangdatong-nav .current-menu-parent > a,
.shangdatong-nav .current_page_item > a { opacity: 1; background: rgba(255,255,255,0.14); }
.shangdatong-header.is-solid .shangdatong-nav a:hover,
body.sdt-solid-header .shangdatong-nav a:hover { background: rgba(0, 128, 96, 0.08); }

/* Dropdown submenu */
.shangdatong-nav .sub-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  min-width: 0;
  margin: 0;
  padding: 1.5rem clamp(1.5rem, 6vw, 5rem) 1.8rem;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
  background: #fff;
  color: var(--devdiy-color-text-body-default, #16191f);
  border-radius: 0 0 20px 20px;
  box-shadow: 0 34px 70px rgba(0, 28, 36, 0.16), 0 6px 18px rgba(0, 28, 36, 0.07);
  border: 1px solid var(--devdiy-color-border-divider-default, #eaeded);
  border-top: 1px solid rgba(0, 128, 96, 0.14);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity 0.25s ease, transform 0.25s cubic-bezier(0.22, 1, 0.36, 1), visibility 0.25s;
}
/* 面板顶部品牌色细节线,增加层次感 */
.shangdatong-nav .sub-menu::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #008060, #00a67e 55%, rgba(0, 166, 126, 0.15));
}
.shangdatong-nav li:hover > .sub-menu,
.shangdatong-nav li:focus-within > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.shangdatong-nav .sub-menu li + li { margin-top: 0; }
.shangdatong-nav .sub-menu a {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.05rem 1.2rem;
  border-radius: 14px;
  border: 1px solid transparent;
  opacity: 1;
  background: none;
  font-size: 1.04rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: background 0.18s ease, border-color 0.18s ease;
}
.shangdatong-nav .sub-menu a:hover {
  background: rgba(0, 128, 96, 0.06);
  border-color: rgba(0, 128, 96, 0.25);
}
.shangdatong-nav .sub-menu a::after {
  content: attr(data-desc);
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--devdiy-color-text-small, #687078);
  font-weight: 400;
  letter-spacing: 0;
  white-space: normal;
}
.shangdatong-nav .menu-item-has-children > a::after {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-left: 0.45rem;
  border-right: 1.6px solid currentColor;
  border-bottom: 1.6px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  opacity: 0.7;
  vertical-align: middle;
}

/* Mobile burger */
.shangdatong-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0 9px;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
}
.shangdatong-burger span {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.shangdatong-burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.shangdatong-burger.is-open span:nth-child(2) { opacity: 0; }
.shangdatong-burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 960px) {
  .shangdatong-burger { display: flex; }
  .shangdatong-nav {
    position: fixed;
    top: var(--shangdatong-header-h, 68px);
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    color: var(--devdiy-color-text-body-default, #16191f);
    padding: 1rem var(--devdiy-page-inline, 16px) 3rem;
    overflow-y: auto;
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 0.3s ease, visibility 0.3s;
  }
  .shangdatong-nav.is-open { transform: translateX(0); visibility: visible; }
  .shangdatong-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .shangdatong-nav a {
    display: block;
    padding: 0.85rem 0.5rem;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--devdiy-color-border-divider-default, #eaeded);
    border-radius: 0;
    opacity: 1;
    background: none;
  }
  .shangdatong-nav .sub-menu {
    position: static;
    display: block;
    min-width: 0;
    margin: 0;
    padding: 0 0 0 1rem;
    box-shadow: none;
    border: none;
    border-radius: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
  }
  .shangdatong-nav li.is-expanded > .sub-menu { display: block; }
  .shangdatong-nav li.menu-item-has-children > a {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .shangdatong-nav .sub-menu a { border-bottom: none; padding: 0.6rem 0.5rem; }
  .shangdatong-nav .sub-menu a::after { display: none; }
  .shangdatong-nav .menu-item-has-children > a::after { transform: rotate(45deg); }
}

/* ============ Hero carousel (full-bleed, top of viewport) ============ */
.shangdatong-hero-carousel {
  position: relative;
  width: 100%;
  height: clamp(580px, 94vh, 960px);
  overflow: hidden;
  background: var(--shangdatong-ink, #064E3B);
}
.shangdatong-hero-carousel__slide::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(90deg, rgba(2, 22, 28, 0.62) 0%, rgba(2, 22, 28, 0.34) 46%, rgba(2, 22, 28, 0.06) 78%),
              linear-gradient(0deg, rgba(2, 22, 28, 0.45) 0%, rgba(2, 22, 28, 0) 32%);
}
.shangdatong-hero-carousel__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.9s ease, visibility 0.9s;
  z-index: 1;
}
.shangdatong-hero-carousel__slide.is-active {
  opacity: 1;
  visibility: visible;
  z-index: 2;
}
.shangdatong-hero-carousel__slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.06);
  transition: transform 7s ease-out;
}
.shangdatong-hero-carousel__slide.is-active img { animation: sdtKenBurns 10s cubic-bezier(0.22, 0.61, 0.36, 1) forwards; }
@keyframes sdtKenBurns {
  from { transform: scale(1.14) translateX(1.2%); }
  to   { transform: scale(1.02) translateX(0); }
}
.shangdatong-hero-carousel__content {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: var(--devdiy-content-max, 1440px);
  margin: 0 auto;
  padding-inline: var(--devdiy-page-inline, 80px);
  padding-top: var(--shangdatong-header-h, 68px);
  color: #fff;
}
.shangdatong-hero-carousel__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.85;
  margin: 0 0 1rem;
}
.shangdatong-hero-carousel__kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: currentColor;
  display: inline-block;
}
.shangdatong-hero-carousel__title {
  margin: 0 0 1.1rem;
  font-size: clamp(2.2rem, 5vw, 4.3rem);
  font-weight: 800;
  line-height: 1.16;
  max-width: 22em;
  letter-spacing: 0.01em;
  text-shadow: 0 4px 28px rgba(0, 20, 30, 0.45);
}
.shangdatong-hero-carousel__desc {
  margin: 0 0 2.2rem;
  font-size: clamp(1.05rem, 1.55vw, 1.35rem);
  line-height: 1.65;
  max-width: 38em;
  opacity: 0.95;
  text-shadow: 0 2px 16px rgba(0, 20, 30, 0.45);
}
.shangdatong-hero-carousel__actions { display: flex; gap: 12px; flex-wrap: wrap; }
.shangdatong-hero-carousel__content .shangdatong-btn { text-shadow: none; }

.shangdatong-hero-carousel__arrow {
  position: absolute;
  top: auto;
  bottom: 28px;
  transform: none;
  z-index: 5;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 28, 36, 0.30);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: background 0.2s ease, opacity 0.35s ease, visibility 0.35s ease, transform 0.35s ease;
  -webkit-user-select: none;
  user-select: none;
}
.shangdatong-hero-carousel__arrow--prev { transform: translateX(-8px); }
.shangdatong-hero-carousel__arrow--next { transform: translateX(8px); }
.shangdatong-hero-carousel:hover .shangdatong-hero-carousel__arrow,
.shangdatong-hero-carousel:focus-within .shangdatong-hero-carousel__arrow {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.shangdatong-hero-carousel:hover .shangdatong-hero-carousel__arrow:hover { background: rgba(0, 128, 96, 0.75); }
.shangdatong-hero-carousel__arrow--prev { left: auto; right: calc(var(--devdiy-page-inline, 80px) + 62px); }
.shangdatong-hero-carousel__arrow--next { right: var(--devdiy-page-inline, 80px); }
@media (max-width: 1100px) {
  .shangdatong-hero-carousel__arrow { display: none; }
}
@media (max-width: 768px) {
  .shangdatong-hero-carousel { height: clamp(500px, 80vh, 680px); }
}

.shangdatong-hero-carousel__dots {
  position: absolute;
  left: 90px;
  transform: none;
  bottom: 48px;
  z-index: 5;
  display: flex;
  gap: 12px;
}
.shangdatong-hero-carousel__dots button {
  position: relative;
  width: 44px;
  height: 4px;
  padding: 0;
  border: none;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.28);
  cursor: pointer;
  overflow: hidden;
  transition: width 0.25s ease, background 0.25s ease;
}
.shangdatong-hero-carousel__dots button::after {
  content: "";
  position: absolute;
  inset: 0;
  background: #fff;
  transform: translateX(-101%);
}
.shangdatong-hero-carousel__dots button.is-active { width: 64px; }
.shangdatong-hero-carousel__dots button.is-active::after { animation: sdtDotProgress 6s linear forwards; }
@keyframes sdtDotProgress { from { transform: translateX(-101%); } to { transform: translateX(0); } }
@media (max-width: 768px) {
  .shangdatong-hero-carousel__dots { left: 50%; transform: translateX(-50%); bottom: 24px; }
  .shangdatong-hero-carousel__dots button { width: 30px; }
  .shangdatong-hero-carousel__dots button.is-active { width: 48px; }
}
.shangdatong-hero-carousel__scrollhint {
  position: absolute;
  left: 50%;
  bottom: 52px;
  transform: translateX(-50%);
  z-index: 4;
  color: rgba(255,255,255,0.75);
  font-size: 0.72rem;
  letter-spacing: 0.3em;
  text-align: center;
}

/* ============ Sections ============ */
.shangdatong-section {
  padding-block: var(--devdiy-section-pad-y, 45px);
  width: 100%;
}
.shangdatong-section--alt { background: var(--devdiy-color-grey-100, #fafafa); }
.shangdatong-section--tint { background: var(--devdiy-color-blue-100, #f1faff); }
.shangdatong-section--ink {
  background:
    radial-gradient(1000px 420px at 85% -10%, rgba(0,161,201,0.28), transparent 60%),
    radial-gradient(800px 400px at 5% 110%, rgba(0,128,96,0.32), transparent 60%),
    var(--devdiy-color-grey-900, #16191f);
  color: #fff;
}
.shangdatong-section--ink a { color: #7fd8c8; }
.shangdatong-section__inner {
  width: 100%;
  max-width: var(--devdiy-content-max, 1440px);
  margin: 0 auto;
  padding-inline: var(--devdiy-page-inline, 80px);
}
.shangdatong-section__head { max-width: 760px; margin-bottom: 2rem; }
.shangdatong-section__head--center { margin-inline: auto; text-align: center; }
.shangdatong-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--shangdatong-primary, #008060);
  margin: 0 0 0.5rem;
  text-transform: uppercase;
}
.shangdatong-section--ink .shangdatong-eyebrow { color: #6fd0be; }
.shangdatong-section h2 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.6rem, 2.8vw, 2.3rem);
  color: inherit;
}
.shangdatong-section__head p { margin: 0; color: var(--devdiy-color-text-secondary, #545b64); font-size: 1.02rem; }
.shangdatong-section--ink .shangdatong-section__head p { color: rgba(255,255,255,0.78); }

/* Buttons */
.shangdatong-btn {
  display: inline-block;
  background: var(--shangdatong-primary, #008060);
  color: #fff !important;
  padding: 0.72rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.shangdatong-btn:hover {
  background: var(--shangdatong-primary-hover, #006B4F);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 107, 79, 0.28);
}
.shangdatong-btn--ghost {
  background: transparent;
  border: 1.5px solid rgba(255, 255, 255, 0.65);
  color: #fff !important;
}
.shangdatong-btn--ghost:hover { background: rgba(255,255,255,0.14); box-shadow: none; }
.shangdatong-btn--outline {
  background: transparent;
  border: 1.5px solid var(--shangdatong-primary, #008060);
  color: var(--shangdatong-primary, #008060) !important;
}
.shangdatong-btn--outline:hover {
  background: var(--shangdatong-primary, #008060);
  color: #fff !important;
  box-shadow: none;
}

/* ============ Stats bar ============ */
.shangdatong-stats {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1.25rem;
  padding-block: 3.2rem;
}
.shangdatong-stat { text-align: center; }
.shangdatong-stat__num {
  font-size: clamp(2.1rem, 3.6vw, 3rem);
  font-weight: 700;
  color: var(--shangdatong-primary, #008060);
  line-height: 1.15;
  font-variant-numeric: tabular-nums;
}
.shangdatong-stat__num sup { font-size: 0.55em; }
.shangdatong-stat__label { margin-top: 0.35rem; color: var(--devdiy-color-text-secondary, #545b64); font-size: 0.95rem; }
.shangdatong-section--ink .shangdatong-stat__num { color: #6fd0be; }
.shangdatong-section--ink .shangdatong-stat__label { color: rgba(255,255,255,0.75); }
@media (max-width: 768px) {
  .shangdatong-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
  .shangdatong-stats .shangdatong-stat:last-child:nth-child(odd) { grid-column: 1 / -1; }
}

/* ============ Cards (product matrix / generic) ============ */
.shangdatong-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}
.shangdatong-cards--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.shangdatong-cards--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 1080px) {
  .shangdatong-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .shangdatong-cards--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .shangdatong-cards,
  .shangdatong-cards--2,
  .shangdatong-cards--4 { grid-template-columns: 1fr; }
}
.shangdatong-card {
  background: var(--devdiy-color-white, #fff);
  border: 1px solid var(--devdiy-color-border-divider-default, #eaeded);
  border-radius: 14px;
  padding: 1.6rem 1.5rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.shangdatong-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px var(--devdiy-color-shadow-side, rgba(0,28,36,0.15));
  border-color: rgba(0, 128, 96, 0.4);
}
.shangdatong-card h3 { margin: 0 0 0.5rem; font-size: 1.15rem; color: var(--shangdatong-ink, #064E3B); }
.shangdatong-card p { margin: 0 0 1rem; color: var(--devdiy-color-text-secondary, #545b64); font-size: 0.95rem; }
.shangdatong-card__tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--shangdatong-primary, #008060);
  background: rgba(0, 128, 96, 0.1);
  border-radius: 999px;
  padding: 0.18rem 0.65rem;
  margin-bottom: 0.7rem;
}
.shangdatong-card__tag--blue { color: var(--devdiy-color-blue-600, #0073bb); background: rgba(0, 115, 187, 0.1); }
.shangdatong-card__tag--green { color: var(--devdiy-color-green-600, #1d8102); background: rgba(29, 129, 2, 0.1); }
.shangdatong-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
}
.shangdatong-card__link::after { content: "↗"; font-size: 0.85em; }
.shangdatong-card__link:hover { text-decoration: underline; }
.shangdatong-card__innerlink { color: var(--shangdatong-primary, #008060); }
.shangdatong-card__innerlink::after { content: "→"; }
.shangdatong-card--ink {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #fff;
}
.shangdatong-card--ink h3 { color: #fff; }
.shangdatong-card--ink p { color: rgba(255,255,255,0.75); }
.shangdatong-card--ink:hover { border-color: rgba(111, 208, 190, 0.6); box-shadow: 0 14px 34px rgba(0,0,0,0.35); }

/* ============ About split ============ */
.shangdatong-split {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 3rem;
  align-items: start;
}
@media (max-width: 900px) { .shangdatong-split { grid-template-columns: 1fr; gap: 1.5rem; } }
.shangdatong-split__text p { margin: 0 0 1rem; font-size: 1.02rem; color: var(--devdiy-color-text-secondary, #545b64); }
.shangdatong-badges { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.9rem; }
.shangdatong-badge {
  background: var(--devdiy-color-grey-100, #fafafa);
  border: 1px solid var(--devdiy-color-border-divider-default, #eaeded);
  border-radius: 12px;
  padding: 1rem 1.1rem;
}
.shangdatong-badge strong { display: block; color: var(--shangdatong-ink, #064E3B); font-size: 1rem; margin-bottom: 0.15rem; }
.shangdatong-badge span { font-size: 0.85rem; color: var(--devdiy-color-text-small, #687078); }

/* ============ Page hero (subpages) ============ */
.shangdatong-pagehero {
  padding: calc(var(--shangdatong-header-h, 68px) + 4.2rem) 0 3.4rem;
  background:
    radial-gradient(900px 380px at 88% -20%, rgba(0,161,201,0.35), transparent 62%),
    radial-gradient(700px 340px at 2% 120%, rgba(0,128,96,0.4), transparent 60%),
    linear-gradient(135deg, #053d2f, #0a4a74);
  color: #fff;
}
.shangdatong-pagehero__inner {
  max-width: var(--devdiy-content-max, 1440px);
  margin: 0 auto;
  padding-inline: var(--devdiy-page-inline, 80px);
}
.shangdatong-pagehero h1 { margin: 0 0 0.6rem; font-size: clamp(1.9rem, 3.4vw, 2.7rem); }
.shangdatong-pagehero p { margin: 0; max-width: 52em; color: rgba(255,255,255,0.85); font-size: 1.05rem; }
.shangdatong-pagehero .shangdatong-eyebrow { color: #6fd0be; }

/* ============ Timeline / list blocks (about & contact) ============ */
.shangdatong-list { list-style: none; margin: 0; padding: 0; }
.shangdatong-list li {
  position: relative;
  padding: 0.9rem 0 0.9rem 1.6rem;
  border-bottom: 1px solid var(--devdiy-color-border-divider-default, #eaeded);
  color: var(--devdiy-color-text-secondary, #545b64);
}
.shangdatong-list li::before {
  content: "";
  position: absolute;
  left: 0.25rem;
  top: 1.45rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--shangdatong-primary, #008060);
}
.shangdatong-list strong { color: var(--devdiy-color-text-body-default, #16191f); }

.shangdatong-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--devdiy-color-border-divider-default, #eaeded);
  border-radius: 12px;
  overflow: hidden;
}
.shangdatong-table th, .shangdatong-table td {
  text-align: left;
  padding: 0.9rem 1.1rem;
  border-bottom: 1px solid var(--devdiy-color-border-divider-default, #eaeded);
  font-size: 0.96rem;
}
.shangdatong-table th { background: var(--devdiy-color-grey-100, #fafafa); color: var(--shangdatong-ink, #064E3B); white-space: nowrap; }
.shangdatong-table tr:last-child td { border-bottom: none; }

/* ============ Footer ============ */
.shangdatong-footer {
  background: #0c1016;
  color: var(--devdiy-color-grey-300, #d5dbdb);
  padding-top: 3.2rem;
  margin: 0;
  position: relative;
}
.shangdatong-footer::before {
  content: "";
  display: block;
  height: 3px;
}
.shangdatong-footer a { color: #fff; text-decoration: none; }
.shangdatong-footer a:hover { color: #6fd0be; }
.shangdatong-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 0.9fr 1.1fr 1.3fr;
  gap: 2.8rem;
  padding-bottom: 3rem;
}
@media (max-width: 900px) { .shangdatong-footer__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .shangdatong-footer__grid { grid-template-columns: 1fr; } }
.shangdatong-footer__brand strong {
  display: block;
  color: #fff;
  font-size: 1.45rem;
  letter-spacing: 0.02em;
  margin-bottom: 0.3rem;
}
.shangdatong-footer__brand small {
  display: block;
  color: #5f6f6d;
  font-size: 0.72rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  margin-bottom: 1.1rem;
}
.shangdatong-footer__brand p { margin: 0; font-size: 0.9rem; color: #879596; max-width: 30em; }
.shangdatong-footer h4 {
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: #7a8a88;
  margin: 0 0 1.2rem;
}
.shangdatong-footer ul { list-style: none; margin: 0; padding: 0; }
.shangdatong-footer li { font-size: 0.9rem; }
.shangdatong-footer__bar {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 1.2rem 0 1.4rem;
  font-size: 0.85rem;
  color: #879596;
}
.shangdatong-footer__bar .shangdatong-shell {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.5rem;
  justify-content: space-between;
}
.shangdatong-footer__bar a { color: #d5dbdb; }
.shangdatong-footer__bar a:hover { color: #6fd0be; }

/* Footer social & contact upgrades */
.shangdatong-social {
  display: flex;
  gap: 0.7rem;
  margin-top: 1.4rem;
}
.shangdatong-social a {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  color: #cfd8d6;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}
.shangdatong-social a:hover {
  background: #008060;
  border-color: #008060;
  color: #fff;
  transform: translateY(-3px);
}
.shangdatong-social svg { width: 19px; height: 19px; fill: currentColor; }
.shangdatong-footer__phone a {
  display: inline-block;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #fff !important;
  margin: 0.15rem 0 0.4rem;
}
.shangdatong-footer__phone small { display: block; font-size: 0.75rem; color: #879596; letter-spacing: 0.18em; }

/* ============ Footer contact mail (v3.7.1) ============ */
.shangdatong-footer__mail a { word-break: break-all; }

/* ============ Reveal animation ============ */
.shangdatong-reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--devdiy-motion-easing-ease-out-quart, cubic-bezier(0.165,0.84,0.44,1)),
              transform 0.6s var(--devdiy-motion-easing-ease-out-quart, cubic-bezier(0.165,0.84,0.44,1));
}
.shangdatong-reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .shangdatong-reveal { opacity: 1; transform: none; transition: none; }
  .shangdatong-hero-carousel__slide img { transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* Content-area defaults (page editor content) */
.shangdatong-prose { max-width: 60em; }
.shangdatong-prose p { color: var(--devdiy-color-text-secondary, #545b64); }
/* ============ Site-wide interaction upgrade ============ */
/* 卡片悬停:上浮 + 顶部品牌色渐入 */
.shangdatong-card { position: relative; overflow: hidden; transition: transform .28s cubic-bezier(.22,1,.36,1), box-shadow .28s ease, border-color .28s ease; }
.shangdatong-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, #008060, #00a67e); transform: scaleX(0); transform-origin: left; transition: transform .35s cubic-bezier(.22,1,.36,1); }
.shangdatong-card:hover { transform: translateY(-6px); box-shadow: 0 22px 48px rgba(0, 28, 36, .14); }
.shangdatong-card:hover::before { transform: scaleX(1); }
.shangdatong-card__link::after { display: inline-block; transition: transform .2s ease; }
.shangdatong-card__link:hover::after { transform: translate(3px, -3px); }

/* 产品卡品牌字标 */
.shangdatong-card__mono { display: inline-flex; width: 44px; height: 44px; align-items: center; justify-content: center; border-radius: 12px; background: linear-gradient(135deg, #008060, #00a67e); color: #fff; font-weight: 800; font-size: 1.1rem; margin-bottom: .9rem; box-shadow: 0 8px 18px rgba(0, 128, 96, .28); }

/* 案例视觉卡 */
.shangdatong-cases { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.6rem; }
.shangdatong-case { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--devdiy-color-border-divider-default, #eaeded); border-radius: 16px; overflow: hidden; color: inherit; text-decoration: none; box-shadow: 0 8px 24px rgba(0, 28, 36, .06); transition: transform .3s cubic-bezier(.22,1,.36,1), box-shadow .3s ease; }
.shangdatong-case:hover { transform: translateY(-6px); box-shadow: 0 26px 54px rgba(0, 28, 36, .16); }
.shangdatong-case__cover { position: relative; display: block; height: 150px; }
.shangdatong-case__cover i { position: absolute; right: 18px; bottom: 2px; font-style: normal; font-size: 4.6rem; font-weight: 800; color: rgba(255, 255, 255, .28); line-height: 1.1; transition: transform .3s ease; }
.shangdatong-case:hover .shangdatong-case__cover i { transform: translateX(-5px); }
.shangdatong-case__cover--a { background: linear-gradient(120deg, #064E3B, #008060); }
.shangdatong-case__cover--b { background: linear-gradient(120deg, #0b3a5b, #1273b8); }
.shangdatong-case__cover--c { background: linear-gradient(120deg, #14532d, #22a45d); }
.shangdatong-case__cover::after { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, .22), transparent 42%); }
.shangdatong-case__body { display: flex; flex-direction: column; gap: .5rem; padding: 1.2rem 1.3rem 1.4rem; }
.shangdatong-case__body strong { font-size: 1.08rem; color: #16191f; }
.shangdatong-case__body em { font-style: normal; color: #545b64; font-size: .92rem; line-height: 1.6; }
.shangdatong-case__body u { text-decoration: none; color: #008060; font-weight: 600; font-size: .92rem; }
.shangdatong-case__body u::after { content: " ↗"; }
@media (max-width: 900px) { .shangdatong-cases { grid-template-columns: 1fr; } }

/* 能力图标 */
.shangdatong-cap__icon { display: inline-flex; width: 46px; height: 46px; align-items: center; justify-content: center; border-radius: 12px; background: rgba(0, 128, 96, .10); color: #008060; margin-bottom: .9rem; }
.shangdatong-cap__icon svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* 技术生态滚动条 */
.shangdatong-marquee { overflow: hidden; background: #fff; border-block: 1px solid var(--devdiy-color-border-divider-default, #eaeded); padding: .95rem 0; }
.shangdatong-marquee__track { display: flex; align-items: center; gap: 2.6rem; width: max-content; animation: sdtMarquee 28s linear infinite; }
.shangdatong-marquee:hover .shangdatong-marquee__track { animation-play-state: paused; }
.shangdatong-marquee span { font-weight: 700; color: #46555c; letter-spacing: .04em; font-size: .95rem; white-space: nowrap; }
.shangdatong-marquee i { color: #008060; font-style: normal; font-weight: 800; font-size: .7rem; }
@keyframes sdtMarquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* 品牌收尾区 */
.shangdatong-brandband { padding-block: 4.5rem; }
.shangdatong-brandband h2 { font-size: clamp(1.8rem, 3.4vw, 2.7rem); margin-bottom: .9rem; }

/* 回到顶部 */
.shangdatong-totop { position: fixed; right: 26px; bottom: 26px; z-index: 60; width: 46px; height: 46px; border-radius: 50%; border: none; background: #008060; color: #fff; font-size: 1.15rem; cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(10px); transition: all .25s ease; box-shadow: 0 12px 28px rgba(0, 128, 96, .35); }
.shangdatong-totop.is-show { display: none; }
.shangdatong-totop:hover { background: #006B4F; }

/* 区块内网格交错入场 */
.shangdatong-reveal .shangdatong-card,
.shangdatong-reveal .shangdatong-case,
.shangdatong-reveal .shangdatong-stat { opacity: 0; transform: translateY(22px); transition: opacity .55s ease, transform .55s cubic-bezier(.165, .84, .44, 1); }
.shangdatong-reveal.is-visible .shangdatong-card,
.shangdatong-reveal.is-visible .shangdatong-case,
.shangdatong-reveal.is-visible .shangdatong-stat { opacity: 1; transform: none; }
.shangdatong-reveal.is-visible .shangdatong-cards > :nth-child(1),
.shangdatong-reveal.is-visible .shangdatong-cases > :nth-child(1),
.shangdatong-reveal.is-visible .shangdatong-stats > :nth-child(1) { transition-delay: .05s; }
.shangdatong-reveal.is-visible .shangdatong-cards > :nth-child(2),
.shangdatong-reveal.is-visible .shangdatong-cases > :nth-child(2),
.shangdatong-reveal.is-visible .shangdatong-stats > :nth-child(2) { transition-delay: .13s; }
.shangdatong-reveal.is-visible .shangdatong-cards > :nth-child(3),
.shangdatong-reveal.is-visible .shangdatong-cases > :nth-child(3),
.shangdatong-reveal.is-visible .shangdatong-stats > :nth-child(3) { transition-delay: .21s; }
.shangdatong-reveal.is-visible .shangdatong-cards > :nth-child(4),
.shangdatong-reveal.is-visible .shangdatong-stats > :nth-child(4) { transition-delay: .29s; }
.shangdatong-reveal.is-visible .shangdatong-cards > :nth-child(5),
.shangdatong-reveal.is-visible .shangdatong-stats > :nth-child(5) { transition-delay: .37s; }
.shangdatong-reveal.is-visible .shangdatong-cards > :nth-child(6) { transition-delay: .45s; }
@media (prefers-reduced-motion: reduce) {
  .shangdatong-reveal .shangdatong-card,
  .shangdatong-reveal .shangdatong-case,
  .shangdatong-reveal .shangdatong-stat { opacity: 1; transform: none; transition: none; }
  .shangdatong-marquee__track { animation: none; }
  .shangdatong-totop { display: none; }
}

/* ============ Brand power upgrade ============ */
/* 全局细节 */
::selection { background: #008060; color: #fff; }
html { scrollbar-width: thin; scrollbar-color: #008060 #eef1f1; }
body::-webkit-scrollbar { width: 10px; }
body::-webkit-scrollbar-thumb { background: linear-gradient(180deg, #008060, #00a67e); border-radius: 8px; }
body::-webkit-scrollbar-track { background: #eef1f1; }

/* 首屏信任徽章行 */
.shangdatong-hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.6rem;
  list-style: none;
  margin: 2.6rem 0 0;
  padding: 1.05rem 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 14px;
  background: rgba(4, 26, 32, 0.30);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  max-width: max-content;
  position: relative;
  z-index: 3;
}
.shangdatong-hero__trust li {
  position: relative;
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}
.shangdatong-hero__trust li + li::before {
  content: "";
  position: absolute;
  left: -0.85rem;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #6fd0be;
}

/* 顶级导航下划线动画 */
.shangdatong-nav > ul > li > a { position: relative; }
.shangdatong-nav > ul > li > a::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: #6fd0be;
  transform: translateX(-50%);
  transition: width 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}
.shangdatong-nav > ul > li:hover > a::before,
.shangdatong-nav > ul > li.current-menu-item > a::before,
.shangdatong-nav > ul > li.current-menu-parent > a::before { width: 55%; }

/* 品牌的力量:2×2 大卡 */
.shangdatong-brandgrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.6rem;
}
.shangdatong-brandcard {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 2.2rem 2.2rem 2rem;
  border-radius: 20px;
  color: #fff;
  text-decoration: none;
  overflow: hidden;
  isolation: isolate;
  box-shadow: 0 14px 40px rgba(0, 28, 36, 0.18);
  transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.32s ease;
}
.shangdatong-brandcard::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(circle at 85% -10%, rgba(255, 255, 255, 0.22), transparent 45%);
  transition: transform 0.4s ease;
}
.shangdatong-brandcard:hover { transform: translateY(-7px); box-shadow: 0 30px 70px rgba(0, 28, 36, 0.30); }
.shangdatong-brandcard:hover::after { transform: scale(1.25); }
.shangdatong-brandcard--devdiy  { background: linear-gradient(130deg, #064E3B 0%, #008060 70%, #00a67e 100%); }
.shangdatong-brandcard--cireni  { background: linear-gradient(130deg, #0b3a5b 0%, #1273b8 70%, #2f9fe0 100%); }
.shangdatong-brandcard--mpforge { background: linear-gradient(130deg, #14532d 0%, #1f9d55 70%, #35c26e 100%); }
.shangdatong-brandcard--wpforge { background: linear-gradient(130deg, #1e293b 0%, #33507a 70%, #4f7fc4 100%); }
.shangdatong-brandcard__cn {
  font-size: clamp(1.7rem, 2.6vw, 2.3rem);
  font-weight: 800;
  letter-spacing: 0.02em;
}
.shangdatong-brandcard__role {
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  opacity: 0.85;
}
.shangdatong-brandcard p { margin: 0.5rem 0 1.1rem; font-size: 0.98rem; line-height: 1.7; opacity: 0.92; max-width: 30em; }
.shangdatong-brandcard em { font-style: normal; font-weight: 700; font-size: 0.95rem; }
.shangdatong-brandcard em::after { content: "→"; display: inline-block; margin-left: 0.35rem; transition: transform 0.25s ease; }
.shangdatong-brandcard:hover em::after { transform: translateX(5px); }
@media (max-width: 900px) { .shangdatong-brandgrid { grid-template-columns: 1fr; } }

/* 全球服务区块 */
.shangdatong-global {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, #06302a 0%, #064E3B 55%, #045642 100%);
  color: #fff;
  padding-block: 5rem;
}
.shangdatong-global__wm {
  position: absolute;
  right: -1.5rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: clamp(6rem, 16vw, 15rem);
  font-weight: 800;
  letter-spacing: 0.06em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.10);
  pointer-events: none;
  user-select: none;
  line-height: 1;
}
.shangdatong-global .shangdatong-eyebrow { color: #6fd0be; }
.shangdatong-global h2 { margin: 0.4rem 0 0.8rem; font-size: clamp(1.9rem, 3.6vw, 2.9rem); }
.shangdatong-global p { color: rgba(255, 255, 255, 0.8); max-width: 34em; }
.shangdatong-global__markets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
}
.shangdatong-global__markets li {
  padding: 0.55rem 1.3rem;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.shangdatong-global__markets li:hover { background: rgba(255, 255, 255, 0.12); border-color: rgba(255, 255, 255, 0.5); transform: translateY(-2px); }

/* ============ Trust wall · How We Work · FAQ (v2.1) ============ */

/* 服务流程 stepper */
.shangdatong-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.6rem;
  margin-top: 2.2rem;
}
.shangdatong-step { position: relative; padding: 0 0.25rem; }
.shangdatong-step__node {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #545b64;
  color: #fff;
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  transition: background 0.6s ease, box-shadow 0.6s ease;
}
.shangdatong-step.is-visible .shangdatong-step__node {
  background: #008060;
  box-shadow: 0 0 0 7px rgba(0, 128, 96, 0.10);
}
.shangdatong-step h3 { margin: 1rem 0 0.45rem; font-size: 1.08rem; }
.shangdatong-step p { margin: 0; color: #545b64; font-size: 0.95rem; }
/* 节点间渐变连接线(最后一个节点不画线) */
.shangdatong-step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 23px;
  left: calc(50% + 38px);
  right: calc(-50% + 38px);
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, rgba(0, 128, 96, 0.9), rgba(0, 128, 96, 0.18));
  opacity: 0.22;
  transition: opacity 0.8s ease 0.25s;
}
.shangdatong-step.is-visible:not(:last-child)::after { opacity: 1; }
@media (max-width: 960px) {
  .shangdatong-steps { grid-template-columns: 1fr 1fr; gap: 1.4rem; }
  .shangdatong-step:not(:last-child)::after { display: none; }
}
@media (max-width: 560px) {
  .shangdatong-steps { grid-template-columns: 1fr; }
}

/* 信任墙(复用 marquee,加大字号字距 + 悬停上浮变色) */
.shangdatong-section--trust { padding-block: 2.4rem 2.8rem; }
.shangdatong-marquee--brands { background: transparent; border-block: 0; padding: 0.9rem 0 0; }
.shangdatong-marquee--brands .shangdatong-marquee__track { gap: 3.2rem; animation-duration: 38s; }
.shangdatong-marquee--brands span {
  display: inline-block;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  color: #aab7b8;
  white-space: nowrap;
  transition: color 0.35s ease, transform 0.35s ease;
  cursor: default;
}
.shangdatong-marquee--brands span:hover { color: #064E3B; transform: translateY(-3px); }
.shangdatong-marquee--brands i { opacity: 0.55; }
.shangdatong-trustnote {
  text-align: center;
  color: #879596;
  font-size: 0.85rem;
  margin: 1rem 0 0;
  padding-inline: var(--devdiy-page-inline, 80px);
}
@media (max-width: 768px) {
  .shangdatong-marquee--brands span { font-size: 1.05rem; letter-spacing: 0.14em; }
}

/* FAQ 手风琴(原生 details/summary,无 JS 依赖) */
.shangdatong-faqs { max-width: 880px; margin: 2.1rem auto 0; display: grid; gap: 0.8rem; }
.shangdatong-faq {
  background: #fff;
  border: 1px solid var(--devdiy-color-border-layout, #d5dbdb);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.shangdatong-faq:hover {
  border-color: #008060;
  box-shadow: 0 8px 22px rgba(6, 78, 59, 0.08);
}
.shangdatong-faq summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.05rem 1.3rem;
  font-weight: 700;
  color: #16191f;
}
.shangdatong-faq summary::-webkit-details-marker { display: none; }
.shangdatong-faq__plus {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  transition: transform 0.3s ease;
}
.shangdatong-faq__plus::before,
.shangdatong-faq__plus::after {
  content: '';
  position: absolute;
  background: #008060;
  border-radius: 2px;
}
.shangdatong-faq__plus::before { left: 7.5px; top: 2px; width: 3px; height: 14px; }
.shangdatong-faq__plus::after { top: 7.5px; left: 2px; width: 14px; height: 3px; }
.shangdatong-faq[open] .shangdatong-faq__plus { transform: rotate(45deg); }
.shangdatong-faq[open] summary { color: #008060; }
.shangdatong-faq__a { padding: 0 1.3rem 1.15rem; color: #545b64; }
.shangdatong-faq__a p { margin: 0; max-width: 64ch; }

/* /about 资质与伙伴徽章条 */
.shangdatong-creds {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.2rem;
  margin-top: 1.8rem;
}
.shangdatong-cred {
  background: #fff;
  border: 1px solid var(--devdiy-color-border-layout, #d5dbdb);
  border-radius: 14px;
  padding: 1.4rem 1rem;
  text-align: center;
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.shangdatong-cred:hover {
  border-color: #008060;
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(6, 78, 59, 0.09);
}
.shangdatong-cred__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(0, 128, 96, 0.09);
  margin: 0 auto 0.7rem;
}
.shangdatong-cred__icon svg { width: 26px; height: 26px; stroke: #008060; fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.shangdatong-cred strong { display: block; font-size: 1rem; margin-bottom: 0.25rem; }
.shangdatong-cred span { color: #545b64; font-size: 0.88rem; }
@media (max-width: 960px) { .shangdatong-creds { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .shangdatong-creds { grid-template-columns: 1fr; } }

/* Reduced-motion 降级 */
@media (prefers-reduced-motion: reduce) {
  .shangdatong-step,
  .shangdatong-step__node,
  .shangdatong-step:not(:last-child)::after,
  .shangdatong-marquee--brands span,
  .shangdatong-faq,
  .shangdatong-faq__plus,
  .shangdatong-cred { transition: none !important; animation: none !important; }
  .shangdatong-cred:hover { transform: none; }
  .shangdatong-marquee--brands span:hover { transform: none; }
}

/* ============ Craft upgrade: icon system · manifesto · matrix (v2.2) ============ */

/* 统一图标体系:品牌绿渐变底座 + 双描边 + 1.8 线条(currentColor) */
.shangdatong-cap__icon {
  background: linear-gradient(135deg, #008060, #00a67e);
  color: #fff;
  border-radius: 14px;
  box-shadow:
    inset 0 0 0 1.5px rgba(255, 255, 255, 0.30),
    0 0 0 1.5px rgba(0, 128, 96, 0.22),
    0 10px 22px rgba(0, 128, 96, 0.28);
}
.shangdatong-cap__icon svg { width: 24px; height: 24px; }

/* 流程节点沿用同一底座语言(点亮后转品牌绿渐变) */
.shangdatong-step__node {
  background: linear-gradient(135deg, #687078, #2a2e33);
}
.shangdatong-step.is-visible .shangdatong-step__node {
  background: linear-gradient(135deg, #008060, #00a67e);
  box-shadow:
    inset 0 0 0 1.5px rgba(255, 255, 255, 0.30),
    0 0 0 1.5px rgba(0, 128, 96, 0.22),
    0 0 0 7px rgba(0, 128, 96, 0.10);
}

/* 页脚社媒:同一渐变底座体系 */
.shangdatong-social a {
  background: transparent;
  color: #fff;
}
.shangdatong-social a:hover {
  background: transparent;
  color: #6fd0be;
  transform: translateY(-3px);
}

/* 案例封面行业图形(店铺门头 / 地球语言 / 聊天气泡) */
.shangdatong-case__glyph {
  position: absolute;
  left: 20px;
  bottom: 12px;
  width: 62px;
  height: 62px;
  color: #fff;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.85;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.shangdatong-case:hover .shangdatong-case__glyph { transform: translateY(-4px); opacity: 1; }

/* 品牌宣言大字 */
.shangdatong-manifesto {
  font-size: clamp(1.3rem, 2.4vw, 1.9rem);
  font-weight: 800;
  color: #16191f;
  line-height: 1.35;
  letter-spacing: 0.01em;
  margin: 0.4rem 0 0.55rem;
}
.shangdatong-manifesto strong { color: #008060; }
.shangdatong-section--ink .shangdatong-manifesto,
.shangdatong-brandband .shangdatong-manifesto { color: #fff; }

/* 品牌矩阵架构图面板 */
.shangdatong-matrix {
  background: #fff;
  border: 1px solid var(--devdiy-color-border-layout, #d5dbdb);
  border-radius: 16px;
  padding: 1rem;
  box-shadow: 0 14px 34px rgba(6, 78, 59, 0.08);
}
.shangdatong-matrix svg { width: 100%; height: auto; display: block; }
.sdt-matrix-line {
  fill: none;
  stroke-width: 2.4;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 1.1s ease;
}
.sdt-matrix-line:nth-of-type(2) { transition-delay: 0.15s; }
.sdt-matrix-line:nth-of-type(3) { transition-delay: 0.3s; }
.sdt-matrix-line:nth-of-type(4) { transition-delay: 0.45s; }
.shangdatong-reveal.is-visible .sdt-matrix-line { stroke-dashoffset: 0; }
.sdt-matrix-node {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.sdt-matrix-node:nth-of-type(1) { transition-delay: 0.1s; }
.sdt-matrix-node:nth-of-type(2) { transition-delay: 0.5s; }
.sdt-matrix-node:nth-of-type(3) { transition-delay: 0.65s; }
.sdt-matrix-node:nth-of-type(4) { transition-delay: 0.8s; }
.sdt-matrix-node:nth-of-type(5) { transition-delay: 0.95s; }
.shangdatong-reveal.is-visible .sdt-matrix-node { opacity: 1; transform: none; }

/* 全球区块硬实力注脚 */
.shangdatong-global__note {
  font-weight: 700;
  color: #6fd0be;
  letter-spacing: 0.04em;
  margin-top: 0.6rem;
}

/* Reduced-motion 降级 */
@media (prefers-reduced-motion: reduce) {
  .sdt-matrix-line { stroke-dashoffset: 0; transition: none; }
  .sdt-matrix-node { opacity: 1; transform: none; transition: none; }
  .shangdatong-case__glyph,
  .shangdatong-social a,
  .shangdatong-step__node { transition: none !important; }
  .shangdatong-social a:hover { transform: none; }
}

/* 页脚底栏手机端居中 */
@media (max-width: 760px) {
  .shangdatong-footer__bar .shangdatong-shell {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
  }
  .shangdatong-footer__bar .shangdatong-shell > * {
    max-width: 100%;
    margin-inline: auto;
  }
}

/* 关闭按钮:桌面端隐藏,仅移动抽屉内显示 */
.shangdatong-nav__close { display: none; }

/* ============ Mobile drawer menu v2 (≤960px, deep-ink full screen) ============ */
@media (max-width: 960px) {
  /* 打开时锁定滚动 */
  body.sdt-nav-open { overflow: hidden; }

  /* 打开抽屉时 header 强制透明白字(深绿抽屉之上清晰可读) */
  body.sdt-nav-open .shangdatong-header {
    background: transparent;
    color: #fff;
    box-shadow: none;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  /* 全屏抽屉:从视口最顶端开始,显式 z-index,内部可滚动 */
  .shangdatong-nav {
    top: 0;
    right: 0;
    left: auto;
    width: 90%;
    max-width: 380px;
    bottom: 0;
    z-index: 999;
    padding: calc(var(--shangdatong-header-h, 68px) + 14px) 22px 3rem;
    background: linear-gradient(180deg, #064E3B 0%, #032a20 100%);
    color: #fff;
    box-shadow: -24px 0 60px rgba(0, 28, 36, 0.35);
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  /* 抽屉内右上角关闭按钮(大号点击区) */
  .shangdatong-nav__close {
    position: absolute;
    top: 14px;
    right: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: rgba(255, 255, 255, 0.10);
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 50%;
    color: #fff;
    font-size: 1.15rem;
    line-height: 1;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
  }
  .shangdatong-nav__close:hover { background: rgba(255, 255, 255, 0.20); transform: rotate(90deg); }
  .shangdatong-nav__close:active { transform: scale(0.94); }

  /* 半透明遮罩:盖住左侧背景与页面,轻微模糊提升质感 */
  .sdt-nav-mask {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 998;
    background: rgba(0, 0, 0, 0.5);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s;
  }
  body.sdt-nav-open .sdt-nav-mask { opacity: 1; visibility: visible; }
  .sdt-nav-mask:hover { background: rgba(0, 0, 0, 0.44); }
  .shangdatong-nav ul { display: block; }

  /* 顶级项 */
  .shangdatong-nav a {
    display: block;
    padding: 1rem 0.4rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: #fff;
    opacity: 0.95;
    border-bottom: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 0;
    background: none;
  }
  .shangdatong-nav a:hover { opacity: 1; background: rgba(255, 255, 255, 0.06); }
  .shangdatong-nav .current-menu-item > a,
  .shangdatong-nav .current-menu-parent > a,
  .shangdatong-nav .current_page_item > a {
    opacity: 1;
    color: #6fd0be;
    background: rgba(255, 255, 255, 0.05);
  }
  /* 禁用桌面遗留装饰:下划线动画、箭头符号 */
  .shangdatong-nav > ul > li > a::before,
  .shangdatong-nav .menu-item-has-children > a::after { display: none; }

  /* 子菜单:默认全部展开,缩进 + 薄荷圆点 */
  .shangdatong-nav .sub-menu,
  .shangdatong-nav li.is-expanded > .sub-menu,
  .shangdatong-nav li:hover > .sub-menu,
  .shangdatong-nav li:focus-within > .sub-menu {
    position: static;
    display: block;
    grid-template-columns: none;
    padding: 0 0 0.4rem 1.1rem;
    margin: 0;
    background: none;
    box-shadow: none;
    border: none;
    border-radius: 0;
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: none;
  }
  .shangdatong-nav .sub-menu::before { display: none; }
  .shangdatong-nav .sub-menu a {
    position: relative;
    display: block;
    padding: 0.75rem 0.5rem 0.75rem 1.2rem;
    font-size: 0.98rem;
    font-weight: 500;
    color: #fff;
    opacity: 0.88;
    border-bottom: none;
  }
  .shangdatong-nav .sub-menu a:hover { background: rgba(255, 255, 255, 0.06); opacity: 1; }
  .shangdatong-nav .sub-menu a::after {
    content: "";
    position: absolute;
    left: 0.15rem;
    top: 50%;
    transform: translateY(-50%);
    display: block;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #6fd0be;
  }
}

@media (prefers-reduced-motion: reduce) {
  .shangdatong-nav,
  .sdt-nav-mask,
  .shangdatong-nav__close { transition: none; }
  .shangdatong-nav__close:hover { transform: none; }
}

/* 页脚导航/品牌列手机端紧凑化:横向流式胶囊 */
@media (max-width: 560px) {
  .shangdatong-footer__grid { gap: 2rem; padding-bottom: 2.2rem; }
  .shangdatong-footer h4 { margin-bottom: 0.75rem; }
  .shangdatong-footer__grid > div:nth-child(2) ul,
  .shangdatong-footer__grid > div:nth-child(3) ul {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 0.55rem;
  }
  .shangdatong-footer__grid li { margin-bottom: 0; }
  .shangdatong-footer__grid > div:nth-child(2) li a,
  .shangdatong-footer__grid > div:nth-child(3) li a {
    display: inline-block;
    padding: 0.34rem 0.9rem;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 999px;
    font-size: 0.84rem;
    line-height: 1.5;
    color: #d5dbdb;
    transition: border-color 0.2s ease, color 0.2s ease;
  }
  .shangdatong-footer__grid > div:nth-child(2) li a:hover,
  .shangdatong-footer__grid > div:nth-child(3) li a:hover {
    border-color: rgba(111, 208, 190, 0.65);
    color: #6fd0be;
  }
}

/* ============ Products page copy/design refresh (v2.3.5) ============ */

/* 卡片信息层级:品牌名 → 一句定位 → 说明 → 域名链接 */
.shangdatong-card__role {
  margin: 0.5rem 0 0.3rem;
  font-weight: 700;
  font-size: 1rem;
  color: #064E3B;
}
.shangdatong-card__desc {
  margin: 0 0 1.05rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: #545b64;
}
.shangdatong-card--ink .shangdatong-card__role { color: #6fd0be; }
.shangdatong-card--ink .shangdatong-card__desc { color: #d5dbdb; }

/* 域名链接:短域名 + ↗,hover 箭头外推 */
.shangdatong-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.shangdatong-card__link span { display: inline-block; transition: transform 0.25s ease; }
.shangdatong-cards .shangdatong-card:hover .shangdatong-card__link span { transform: translate(3px, -3px); }

/* 卡片 hover 微交互:上浮 + 绿边 + 柔和投影 */
.shangdatong-cards .shangdatong-card {
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.3s ease, border-color 0.3s ease;
}
.shangdatong-cards .shangdatong-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 128, 96, 0.45);
  box-shadow: 0 18px 40px rgba(6, 78, 59, 0.10);
}

/* /products 收尾区:品牌名 + 域名清单 */
.shangdatong-coda__brands {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: #064E3B;
  margin: 0 0 0.6rem;
}
.shangdatong-coda__brands span { color: #008060; margin: 0 0.65rem; font-weight: 400; }
.shangdatong-coda__domains {
  font-size: 0.88rem;
  color: #687078;
  letter-spacing: 0.05em;
  word-break: break-all;
}

/* 移动端卡片舒适度 */
@media (max-width: 560px) {
  .shangdatong-card { padding: 1.35rem 1.2rem; }
  .shangdatong-coda__brands { font-size: 1.02rem; }
  .shangdatong-coda__brands span { margin: 0 0.4rem; }
}

@media (prefers-reduced-motion: reduce) {
  .shangdatong-cards .shangdatong-card,
  .shangdatong-card__link span { transition: none !important; }
  .shangdatong-cards .shangdatong-card:hover { transform: none; }
}

/* ============ Products poster redesign (v2.4.0) ============ */

/* hero:关键词缀行 + 右上大水印母题 */
.shangdatong-pagehero--posters { position: relative; overflow: hidden; }
.shangdatong-posterhero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 2rem;
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.78);
}
.shangdatong-posterhero__stats strong {
  font-size: 1.25rem;
  font-weight: 800;
  color: #6fd0be;
  margin-right: 0.35rem;
  letter-spacing: 0.02em;
}
.shangdatong-posterhero__wm {
  position: absolute;
  right: -40px;
  top: 50%;
  transform: translateY(-50%);
  width: clamp(220px, 26vw, 420px);
  opacity: 0.14;
  pointer-events: none;
}
.shangdatong-posterhero__wm svg {
  width: 100%;
  height: auto;
  fill: none;
  stroke: #6fd0be;
  stroke-width: 1.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* 海报大字宣传语(水印感) */
.shangdatong-posterline {
  font-size: clamp(2.4rem, 7vw, 5rem);
  font-weight: 900;
  letter-spacing: 0.06em;
  text-align: center;
  white-space: nowrap;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(0, 128, 96, 0.22);
  padding: 1.2rem var(--devdiy-page-inline, 80px) 0;
  user-select: none;
}

/* 海报卡网格:2 列,首末卡跨 2 列制造节奏 */
.shangdatong-posters {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.4rem;
}
.shangdatong-posters__item--wide { grid-column: span 2; }

/* 海报卡本体(整卡即链接) */
.shangdatong-poster {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 300px;
  padding: 2.2rem 2.2rem 1.9rem;
  border-radius: 22px;
  overflow: hidden;
  color: #fff;
  text-decoration: none;
  isolation: isolate;
  box-shadow: 0 14px 40px rgba(0, 28, 36, 0.18);
  transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.32s ease;
}
.shangdatong-poster::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(circle at 85% -10%, rgba(255, 255, 255, 0.22), transparent 45%);
}
.shangdatong-poster:hover {
  transform: translateY(-7px);
  box-shadow: 0 30px 70px rgba(0, 28, 36, 0.30);
}

/* 六品牌独立配色 */
.shangdatong-poster--p1 { background: linear-gradient(130deg, #064E3B 0%, #008060 70%, #00a67e 100%); }
.shangdatong-poster--p2 { background: linear-gradient(130deg, #0b3a5b 0%, #1273b8 70%, #2f9fe0 100%); }
.shangdatong-poster--p3 { background: linear-gradient(130deg, #45350d 0%, #96731f 70%, #E8B547 100%); }
.shangdatong-poster--p4 { background: linear-gradient(130deg, #14532d 0%, #1f9d55 70%, #35c26e 100%); }
.shangdatong-poster--p5 { background: linear-gradient(130deg, #134e4a 0%, #0f766e 70%, #2dd4bf 100%); }
.shangdatong-poster--p6 { background: linear-gradient(130deg, #1e293b 0%, #33507a 70%, #4f7fc4 100%); }

/* 编号大字(右上低对比) */
.shangdatong-poster__num {
  position: absolute;
  top: 0.6rem;
  right: 1.6rem;
  font-size: clamp(4.5rem, 7vw, 7rem);
  font-weight: 800;
  line-height: 1;
  color: rgba(255, 255, 255, 0.13);
  letter-spacing: -0.02em;
  pointer-events: none;
}

/* 视觉母题:右下水印大图形,hover 微放大 */
.shangdatong-poster__motif {
  position: absolute;
  right: 22px;
  bottom: 20px;
  width: clamp(78px, 9vw, 104px);
  opacity: 0.30;
  filter: drop-shadow(0 2px 10px rgba(255, 255, 255, 0.06));
  pointer-events: none;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.5s ease;
}
.shangdatong-poster__motif svg {
  width: 100%;
  height: auto;
  fill: none;
  stroke: #fff;
  stroke-width: 1.3;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-linejoin: round;
}
.shangdatong-poster:hover .shangdatong-poster__motif {
  transform: scale(1.05);
  opacity: 0.38;
}

/* 卡内文案 */
.shangdatong-poster__tag {
  display: inline-flex;
  align-self: flex-start;
  margin-bottom: 1rem;
  padding: 0.28rem 0.75rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: #fff;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
}
.shangdatong-poster__name {
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.01em;
}
.shangdatong-poster__role {
  margin-top: 0.3rem;
  font-size: 0.92rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.78);
}
.shangdatong-poster__slogan {
  margin-top: 1.1rem;
  max-width: 24em;
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  font-weight: 700;
  line-height: 1.5;
  color: #fff;
}

/* 底部域名行 */
.shangdatong-poster__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: auto;
  padding-top: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  border-top: 1px solid rgba(255, 255, 255, 0.20);
}
.shangdatong-poster__link span { display: inline-block; transition: transform 0.28s ease; }
.shangdatong-poster:hover .shangdatong-poster__link span { transform: translate(4px, -4px); }

/* 移动端:单列,母题与字号收缩 */
@media (max-width: 760px) {
  .shangdatong-posters { grid-template-columns: 1fr; }
  .shangdatong-posters__item--wide { grid-column: auto; }
  .shangdatong-poster { min-height: 250px; padding: 1.7rem 1.5rem 1.5rem; }
  .shangdatong-poster__num { font-size: 3.6rem; top: 0.8rem; right: 1rem; }
  .shangdatong-poster__motif { width: 64px; right: 14px; bottom: 12px; opacity: 0.26; }
  .shangdatong-posterhero__wm { opacity: 0.09; right: -70px; }
  .shangdatong-posterline { white-space: normal; }
}

@media (prefers-reduced-motion: reduce) {
  .shangdatong-poster,
  .shangdatong-poster__motif,
  .shangdatong-poster__link span { transition: none !important; }
  .shangdatong-poster:hover { transform: none; }
  .shangdatong-poster:hover .shangdatong-poster__motif { transform: none; }
}


/* 母题小图标微优化(v2.4.2) */
.shangdatong-poster__motif { transition: opacity 0.35s ease, transform 0.35s ease; }

/* 母题图标收敛(v2.4.3):小而克制,回归官网质感 */
.shangdatong-poster__motif { overflow: hidden; }

/* ============ Cases page redesign (v2.5.0) ============ */
/* 与 /products 同一套编辑风语言:纸感卡底 + 顶部品牌色细线 + 衬线引文,
   案例页自己的气质:2 列等宽、行业 tag、指标胶囊。 */

/* 案例卡网格:2 列等宽(区别于产品页的首末跨列节奏) */
.shangdatong-casesgrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.4rem;
}

/* 三类案例出口的低饱和身份色 */
.shangdatong-casep--a { --brand: #064E3B; }  /* devdiy.cn */
.shangdatong-casep--b { --brand: #134e4a; }  /* devdiy.com */
.shangdatong-casep--c { --brand: #4a6b57; }  /* mpforge.cn */

/* 案例卡:继承纸感卡底,标题用衬线增强项目档案感 */
.shangdatong-poster--case { min-height: 0; }
.shangdatong-poster--case .shangdatong-poster__name {
  font-family: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  font-size: 1.32rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.4;
}
.shangdatong-poster--case .shangdatong-poster__slogan {
  margin-top: 0.85rem;
  font-size: 0.98rem;
  line-height: 1.75;
}

/* 指标胶囊:定性结构性描述,不编数据 */
.shangdatong-casep__metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1.05rem;
}
.shangdatong-casep__metrics i {
  font-style: normal;
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: #545b64;
  background: #fff;
  border: 1px solid #e3e1da;
  border-radius: 999px;
  padding: 0.24rem 0.7rem;
  white-space: nowrap;
}

/* 方法论区块 */
.shangdatong-method {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem 2rem;
  margin-top: 1.9rem;
}
.shangdatong-method__item {
  background: #fff;
  border: 1px solid #e3e1da;
  border-radius: 6px;
  padding: 1.5rem 1.6rem;
}
.shangdatong-method__item strong {
  display: block;
  font-size: 1.02rem;
  color: #064E3B;
  margin-bottom: 0.45rem;
}
.shangdatong-method__item p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.75;
  color: #545b64;
}

/* 收尾区标题(深墨绿底上) */
.shangdatong-section--ink .shangdatong-poster__num { color: rgba(255, 255, 255, 0.4); }

/* 移动端:单列、排版收敛 */
@media (max-width: 760px) {
  .shangdatong-casesgrid { grid-template-columns: 1fr; }
  .shangdatong-method { grid-template-columns: 1fr; gap: 0.9rem; }
  .shangdatong-poster--case .shangdatong-poster__name { font-size: 1.2rem; }
}

@media (prefers-reduced-motion: reduce) {
  .shangdatong-poster--case { transition: none !important; }
}

/* ============ Editorial system restore + no-JS safety (v2.5.2) ============ */
/* 根因修复:v2.4.1 编辑风区块曾被覆盖丢失,导致 /cases 卡片无底色 + 白字隐形。
   本区块完整恢复编辑风体系,并对 /products 与 /cases 的海报卡统一生效;
   同时让内容不依赖 JS/reveal——无 JS 时卡片直接可见。 */

/* 无 JS / observer 未触发兜底:reveal 机制不拦截内容可读性 */
html:not(.js-reveal) .shangdatong-reveal,
html:not(.js-reveal) .shangdatong-reveal .shangdatong-card,
html:not(.js-reveal) .shangdatong-reveal .shangdatong-case,
html:not(.js-reveal) .shangdatong-reveal .shangdatong-stat {
  opacity: 1 !important;
  transform: none !important;
  visibility: visible !important;
}

/* 海报卡:米白纸感底 + 顶部品牌色细线(产品页与案例页统一) */
.shangdatong-poster {
  background: #f7f6f2;
  color: #16191f;
  border: 1px solid #e3e1da;
  border-top: 3px solid var(--brand, #064E3B);
  border-radius: 6px;
  box-shadow: 0 6px 18px rgba(0, 28, 36, 0.05);
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.3s ease, border-color 0.3s ease;
}
.shangdatong-poster::after { content: none; }
.shangdatong-poster:hover {
  transform: translateY(-3px);
  border-color: var(--brand, #064E3B);
  box-shadow: 0 10px 24px rgba(0, 28, 36, 0.07);
}

/* 产品页六品牌:压掉艳丽渐变,回归纸感 + 低饱和身份色 */
.shangdatong-poster--p1 { --brand: #064E3B; background: #f7f6f2; }
.shangdatong-poster--p2 { --brand: #1e3a5f; background: #f7f6f2; }
.shangdatong-poster--p3 { --brand: #8a6d3b; background: #f7f6f2; }
.shangdatong-poster--p4 { --brand: #4a6b57; background: #f7f6f2; }
.shangdatong-poster--p5 { --brand: #134e4a; background: #f7f6f2; }
.shangdatong-poster--p6 { --brand: #3d4448; background: #f7f6f2; }

/* 编号:小号衬线斜体 */
.shangdatong-poster__num {
  top: 1.7rem;
  right: 1.8rem;
  font-family: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  font-style: italic;
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: #9aa1a6;
  line-height: 1;
}

/* 母题:38px 细线单色小图标,品牌色,无放大动效 */
.shangdatong-poster__motif {
  top: 1.7rem;
  right: 4.4rem;
  bottom: auto;
  width: 38px;
  opacity: 0.9;
  filter: none;
  transition: opacity 0.3s ease;
}
.shangdatong-poster__motif svg { stroke: var(--brand, #064E3B); stroke-width: 1.5; }
.shangdatong-poster:hover .shangdatong-poster__motif { transform: none; opacity: 1; }

/* tag:小号拉开字距,去胶囊底 */
.shangdatong-poster__tag {
  background: none;
  border: none;
  border-radius: 0;
  padding: 0;
  margin-bottom: 1.1rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: #8a9196;
}

/* 品牌名与定位行:深色、克制 */
.shangdatong-poster__name { color: #16191f; }
.shangdatong-poster__role { color: #545b64; }

/* slogan:衬线斜体引文,品牌色引线 */
.shangdatong-poster__slogan {
  margin-top: 1.1rem;
  padding-left: 0.9rem;
  border-left: 2px solid var(--brand, #064E3B);
  font-family: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  font-style: italic;
  font-size: 1.02rem;
  font-weight: 400;
  line-height: 1.75;
  color: #3d4448;
}

/* 底部域名行:浅分隔线 + 品牌色,↗ 外推减半 */
.shangdatong-poster__link {
  color: var(--brand, #064E3B);
  border-top: 1px solid #e3e1da;
  padding-top: 1.05rem;
}
.shangdatong-poster:hover .shangdatong-poster__link span { transform: translate(2px, -2px); }

/* 大字宣传语:深墨绿衬线实色 + 两侧短横线 */
.shangdatong-posterline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.4rem;
  -webkit-text-stroke: 0;
  color: #064E3B;
  font-family: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: 0.14em;
}
.shangdatong-posterline::before,
.shangdatong-posterline::after {
  content: "";
  width: 52px;
  height: 1px;
  background: rgba(6, 78, 59, 0.35);
  flex: 0 0 auto;
}

/* hero 关键词缀行:小号灰白、编辑感 */
.shangdatong-posterhero__stats {
  gap: 0.5rem 1.8rem;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.62);
}
.shangdatong-posterhero__stats strong { font-size: 0.95rem; color: #6fd0be; margin-right: 0.3rem; }
.shangdatong-posterhero__wm { opacity: 0.05; }

/* 深色收尾区内的编号恢复可见 */
.shangdatong-section--ink .shangdatong-poster__num { color: rgba(255, 255, 255, 0.4); }

/* 移动端 */
@media (max-width: 760px) {
  .shangdatong-poster { padding: 1.6rem 1.4rem 1.4rem; }
  .shangdatong-poster__num { top: 1.3rem; right: 1.3rem; }
  .shangdatong-poster__motif { top: 1.3rem; right: 3.6rem; width: 32px; }
  .shangdatong-poster__slogan { font-size: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .shangdatong-poster,
  .shangdatong-poster__motif,
  .shangdatong-poster__link span { transition: none !important; }
  .shangdatong-poster:hover { transform: none; }
}

/* ============ Poster style restore for products+cases (v2.6.0) ============ */
/* 两页统一回归深色渐变海报卡 + 白字;v2.5.2 的 no-JS 兜底规则保留不动。 */

/* 海报卡回归:渐变底 + 白字 + 圆角 + 大投影 */
.shangdatong-poster {
  background: linear-gradient(130deg, #064E3B 0%, #008060 70%, #00a67e 100%);
  color: #fff;
  border: none;
  border-radius: 22px;
  box-shadow: 0 14px 40px rgba(0, 28, 36, 0.18);
  min-height: 300px;
}
.shangdatong-poster:hover {
  transform: translateY(-7px);
  border-color: transparent;
  box-shadow: 0 30px 70px rgba(0, 28, 36, 0.30);
}

/* 产品页六品牌渐变复位 */
.shangdatong-poster--p1 { --brand: #6fd0be; background: linear-gradient(130deg, #064E3B 0%, #008060 70%, #00a67e 100%); }
.shangdatong-poster--p2 { --brand: #6fd0be; background: linear-gradient(130deg, #0b3a5b 0%, #1273b8 70%, #2f9fe0 100%); }
.shangdatong-poster--p3 { --brand: #6fd0be; background: linear-gradient(130deg, #45350d 0%, #96731f 70%, #E8B547 100%); }
.shangdatong-poster--p4 { --brand: #6fd0be; background: linear-gradient(130deg, #14532d 0%, #1f9d55 70%, #35c26e 100%); }
.shangdatong-poster--p5 { --brand: #6fd0be; background: linear-gradient(130deg, #134e4a 0%, #0f766e 70%, #2dd4bf 100%); }
.shangdatong-poster--p6 { --brand: #6fd0be; background: linear-gradient(130deg, #1e293b 0%, #33507a 70%, #4f7fc4 100%); }

/* 案例页六卡:按行业配六组深色渐变(饱和度统一在高级感区间,必须每卡有底色,杜绝白字隐形) */
.shangdatong-casesgrid > div:nth-child(1) .shangdatong-poster { background: linear-gradient(130deg, #3a2a1c 0%, #6e4f30 70%, #9a7346 100%); }
.shangdatong-casesgrid > div:nth-child(2) .shangdatong-poster { background: linear-gradient(130deg, #372a5c 0%, #56418f 70%, #7a63b5 100%); }
.shangdatong-casesgrid > div:nth-child(3) .shangdatong-poster { background: linear-gradient(130deg, #1c3454 0%, #2e5c8f 70%, #4d84ba 100%); }
.shangdatong-casesgrid > div:nth-child(4) .shangdatong-poster { background: linear-gradient(130deg, #0e3a37 0%, #166059 70%, #2f8e85 100%); }
.shangdatong-casesgrid > div:nth-child(5) .shangdatong-poster { background: linear-gradient(130deg, #1a4a31 0%, #2b7d52 70%, #46a374 100%); }
.shangdatong-casesgrid > div:nth-child(6) .shangdatong-poster { background: linear-gradient(130deg, #26292e 0%, #3f434b 70%, #5d626d 100%); }

/* 白字体系:编号大字、母题大水印回归 v2.4.0 尺度(收在卡内,不旋转) */
.shangdatong-poster__num {
  top: 0.6rem;
  right: 1.6rem;
  font-family: inherit;
  font-style: normal;
  font-size: clamp(4.5rem, 7vw, 7rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  color: rgba(255, 255, 255, 0.13);
}
.shangdatong-poster__motif {
  top: auto;
  right: 22px;
  bottom: 20px;
  width: clamp(78px, 9vw, 104px);
  opacity: 0.32;
  filter: none;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.5s ease;
}
.shangdatong-poster__motif svg { stroke: #fff; stroke-width: 1.3; }
.shangdatong-poster:hover .shangdatong-poster__motif { transform: scale(1.05); opacity: 0.40; }

/* 白字文案链 */
.shangdatong-poster__name { color: #fff; font-size: clamp(1.9rem, 3vw, 2.6rem); font-weight: 800; font-family: inherit; font-style: normal; }
.shangdatong-poster--case .shangdatong-poster__name { font-size: clamp(1.5rem, 2.4vw, 2rem); }
.shangdatong-poster__role { color: rgba(255, 255, 255, 0.78); }
.shangdatong-poster__tag {
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  padding: 0.28rem 0.75rem;
  margin-bottom: 1rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: #fff;
}
.shangdatong-poster__slogan {
  border-left: none;
  padding-left: 0;
  font-family: inherit;
  font-style: normal;
  font-weight: 700;
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  line-height: 1.5;
  color: #fff;
}
.shangdatong-poster--case .shangdatong-poster__slogan { font-size: clamp(1rem, 1.5vw, 1.2rem); }
.shangdatong-poster__link {
  color: #fff;
  border-top: 1px solid rgba(255, 255, 255, 0.20);
  padding-top: 1.2rem;
}
.shangdatong-poster:hover .shangdatong-poster__link span { transform: translate(4px, -4px); }

/* 案例指标胶囊:深底上的浅透胶囊 */
.shangdatong-casep__metrics { margin-top: 1.1rem; }
.shangdatong-casep__metrics i {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
}
.shangdatong-poster--case { min-height: 280px; }

/* 大字宣传语:回到描边水印风 */
.shangdatong-posterline {
  display: block;
  -webkit-text-stroke: 1.5px rgba(0, 128, 96, 0.22);
  color: transparent;
  font-family: inherit;
  font-style: normal;
  font-weight: 900;
  font-size: clamp(2.4rem, 7vw, 5rem);
  letter-spacing: 0.06em;
}
.shangdatong-posterline::before,
.shangdatong-posterline::after { display: none; }

/* hero 关键词缀行与水印恢复 v2.4.0 尺度 */
.shangdatong-posterhero__stats { font-size: 0.85rem; letter-spacing: 0.14em; color: rgba(255, 255, 255, 0.78); }
.shangdatong-posterhero__stats strong { font-size: 1.25rem; color: #6fd0be; margin-right: 0.35rem; }
.shangdatong-posterhero__wm { opacity: 0.14; }

/* 移动端海报尺度 */
@media (max-width: 760px) {
  .shangdatong-poster { min-height: 250px; padding: 1.7rem 1.5rem 1.5rem; }
  .shangdatong-poster__num { font-size: 3.6rem; top: 0.8rem; right: 1rem; }
  .shangdatong-poster__motif { width: 78px; right: 14px; bottom: 12px; opacity: 0.26; }
}

/* ============ Tech page redesign (v2.7.0) ============ */
/* /tech 回归海报语言:深色渐变能力卡 + 白字 + 数字滚动 + 技术栈 marquee。
   交错入场只在 reveal.js 给区块加 .is-visible 后以 animation 触发:
   JS 失效时卡片天然可见,html:not(.js-reveal) 兜底逻辑延续。 */

/* 能力卡网格:2×2,海报语言 */
.shangdatong-techgrid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.4rem; }
.shangdatong-poster--tech { min-height: 0; padding: 2rem 2rem 1.8rem; }

/* 四组深色渐变(与产品/案例页同语言、彼此区分,每卡必有底色,杜绝白字隐形) */
.shangdatong-techp--t1 { background: linear-gradient(130deg, #064E3B 0%, #008060 70%, #00a67e 100%); }
.shangdatong-techp--t2 { background: linear-gradient(130deg, #0b3a5b 0%, #1273b8 70%, #2f9fe0 100%); }
.shangdatong-techp--t3 { background: linear-gradient(130deg, #372a5c 0%, #56418f 70%, #7a63b5 100%); }
.shangdatong-techp--t4 { background: linear-gradient(130deg, #1c3454 0%, #2e5c8f 70%, #4d84ba 100%); }

/* 白字链(承 v2.6.0 海报体系) */
.shangdatong-poster--tech .shangdatong-poster__name { font-size: clamp(1.35rem, 2.2vw, 1.7rem); letter-spacing: 0.01em; }
.shangdatong-poster--tech .shangdatong-poster__slogan { font-size: 0.98rem; font-weight: 400; line-height: 1.7; color: rgba(255, 255, 255, 0.88); }
.shangdatong-poster--tech .shangdatong-poster__num { font-size: 4.6rem; top: 0.8rem; right: 1.4rem; }

/* hover:上浮 + 边线亮起 */
.shangdatong-poster--tech { box-shadow: 0 0 0 1.5px rgba(255, 255, 255, 0), 0 14px 40px rgba(0, 28, 36, 0.18); }
.shangdatong-poster--tech:hover { box-shadow: 0 0 0 1.5px rgba(255, 255, 255, 0.45), 0 26px 60px rgba(0, 28, 36, 0.28); }

/* 技术栈 chips:卡内底部,hover 微亮 */
.shangdatong-tchips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  list-style: none;
  margin: 1.15rem 0 0;
  padding: 1.1rem 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.20);
}
.shangdatong-tchips li {
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  padding: 0.22rem 0.7rem;
  white-space: nowrap;
  transition: background 0.25s ease, transform 0.25s ease;
}
.shangdatong-tchips li:hover { background: rgba(255, 255, 255, 0.22); transform: translateY(-2px); }
.shangdatong-techp__by { margin: 0.9rem 0 0; font-size: 0.8rem; letter-spacing: 0.06em; color: rgba(255, 255, 255, 0.62); }

/* 交错入场:进入视口后以 animation 上升(延迟按序号递增) */
@keyframes sdtRiseIn { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: none; } }
.shangdatong-reveal.is-visible .shangdatong-techgrid .shangdatong-poster,
.shangdatong-reveal.is-visible .shangdatong-method__item {
  animation: sdtRiseIn 0.6s cubic-bezier(0.165, 0.84, 0.44, 1) both;
}
.shangdatong-reveal.is-visible .shangdatong-techgrid > :nth-child(1),
.shangdatong-reveal.is-visible .shangdatong-method > :nth-child(1) { animation-delay: 0.05s; }
.shangdatong-reveal.is-visible .shangdatong-techgrid > :nth-child(2),
.shangdatong-reveal.is-visible .shangdatong-method > :nth-child(2) { animation-delay: 0.15s; }
.shangdatong-reveal.is-visible .shangdatong-techgrid > :nth-child(3),
.shangdatong-reveal.is-visible .shangdatong-method > :nth-child(3) { animation-delay: 0.25s; }
.shangdatong-reveal.is-visible .shangdatong-techgrid > :nth-child(4),
.shangdatong-reveal.is-visible .shangdatong-method > :nth-child(4) { animation-delay: 0.35s; }

/* no-JS 兜底(延续 v2.5.2 安全网):新元素无 JS 时也强制可见 */
html:not(.js-reveal) .shangdatong-techgrid .shangdatong-poster,
html:not(.js-reveal) .shangdatong-reveal .shangdatong-method__item {
  opacity: 1 !important;
  transform: none !important;
  visibility: visible !important;
  animation: none !important;
}

/* 本页交付条目 hover(作用域限定 /tech 的 shangdatong-techmethod 区块,不影响 /cases) */
.shangdatong-techmethod .shangdatong-method__item { transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.28s ease; }
.shangdatong-techmethod .shangdatong-method__item:hover { transform: translateY(-5px); box-shadow: 0 18px 40px rgba(0, 28, 36, 0.10); }

@media (max-width: 760px) {
  .shangdatong-techgrid { grid-template-columns: 1fr; }
  .shangdatong-poster--tech { padding: 1.7rem 1.5rem 1.5rem; }
  .shangdatong-poster--tech .shangdatong-poster__num { font-size: 3.4rem; top: 0.7rem; right: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  .shangdatong-reveal.is-visible .shangdatong-techgrid .shangdatong-poster,
  .shangdatong-reveal.is-visible .shangdatong-method__item { animation: none; }
  .shangdatong-tchips li { transition: none; }
}

/* ============ Contact page redesign (v2.8.0) ============ */
/* /contact 做成「快速建立信任 → 顺理成章联系我们」的叙事页:
   我们是谁 → 愿景 → 痛点→结果 → 快速交付 → 品牌矩阵 → 联系大卡。
   无表单、不留资;联系渠道就是电话(tel:)+ 品牌站(新窗口 noopener)。
   交错入场沿用 v2.7.0 的 sdtRiseIn 动画机制:JS 失效时内容天然可见。 */

/* 我们是谁:左叙事海报卡 + 右关键信息卡 */
.shangdatong-who { display: grid; grid-template-columns: 1.35fr 1fr; gap: 1.4rem; align-items: stretch; }
.shangdatong-poster--who {
  background: linear-gradient(130deg, #064E3B 0%, #008060 70%, #00a67e 100%);
  min-height: 0;
  padding: 2.2rem 2.2rem 1.9rem;
}
.shangdatong-who__strip { margin-top: 1.4rem; }
.shangdatong-who__facts {
  background: #fff;
  border: 1px solid #e3e1da;
  border-radius: 22px;
  padding: 2rem 2rem 1.6rem;
  box-shadow: 0 8px 24px rgba(0, 28, 36, 0.06);
}
.shangdatong-who__facts h3 { margin: 0 0 0.6rem; font-size: 1.15rem; color: #16191f; }

/* 愿景:大字宣言 + 三个支撑点 */
.shangdatong-vision__line {
  font-size: clamp(1.6rem, 3.2vw, 2.5rem);
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.35;
  margin: 0.4rem 0 1.8rem;
}
.shangdatong-vision__points { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem 3.2rem; }
.shangdatong-vision__points div { display: flex; flex-direction: column; gap: 0.35rem; max-width: 15em; }
.shangdatong-vision__points strong { color: #6fd0be; font-size: 1.02rem; letter-spacing: 0.06em; }
.shangdatong-vision__points span { color: rgba(255, 255, 255, 0.72); font-size: 0.9rem; line-height: 1.65; }

/* 痛点 → 结果:2×2 渐变海报卡(每卡必有底色,白字) */
.shangdatong-paingrid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.4rem; }
.shangdatong-poster--pain { min-height: 0; padding: 2rem 2rem 1.8rem; }
.shangdatong-painp--c1 { background: linear-gradient(130deg, #064E3B 0%, #008060 70%, #00a67e 100%); }
.shangdatong-painp--c2 { background: linear-gradient(130deg, #0b3a5b 0%, #1273b8 70%, #2f9fe0 100%); }
.shangdatong-painp--c3 { background: linear-gradient(130deg, #372a5c 0%, #56418f 70%, #7a63b5 100%); }
.shangdatong-painp--c4 { background: linear-gradient(130deg, #1c3454 0%, #2e5c8f 70%, #4d84ba 100%); }
.shangdatong-poster--pain .shangdatong-poster__name { font-size: clamp(1.3rem, 2.1vw, 1.62rem); }
.shangdatong-poster--pain .shangdatong-poster__slogan { font-size: 0.98rem; font-weight: 400; line-height: 1.7; color: rgba(255, 255, 255, 0.88); }
.shangdatong-poster--pain .shangdatong-poster__num { font-size: 4.6rem; top: 0.8rem; right: 1.4rem; }
.shangdatong-poster--pain { box-shadow: 0 0 0 1.5px rgba(255, 255, 255, 0), 0 14px 40px rgba(0, 28, 36, 0.18); transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.3s ease; }
.shangdatong-poster--pain:hover { transform: translateY(-7px); box-shadow: 0 0 0 1.5px rgba(255, 255, 255, 0.45), 0 26px 60px rgba(0, 28, 36, 0.28); }

/* 痛点卡 / 交付条目交错入场(仅 .is-visible 后触发,JS 失效安全) */
.shangdatong-reveal.is-visible .shangdatong-paingrid .shangdatong-poster {
  animation: sdtRiseIn 0.6s cubic-bezier(0.165, 0.84, 0.44, 1) both;
}
.shangdatong-reveal.is-visible .shangdatong-paingrid > :nth-child(1) { animation-delay: 0.05s; }
.shangdatong-reveal.is-visible .shangdatong-paingrid > :nth-child(2) { animation-delay: 0.15s; }
.shangdatong-reveal.is-visible .shangdatong-paingrid > :nth-child(3) { animation-delay: 0.25s; }
.shangdatong-reveal.is-visible .shangdatong-paingrid > :nth-child(4) { animation-delay: 0.35s; }

/* no-JS 兜底(延续安全网) */
html:not(.js-reveal) .shangdatong-paingrid .shangdatong-poster,
html:not(.js-reveal) .shangdatong-poster--who {
  opacity: 1 !important;
  transform: none !important;
  visibility: visible !important;
  animation: none !important;
}

/* 业务矩阵速览:四品牌一行卡,内链 /products */
.shangdatong-brandline { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.2rem; margin-top: 1.6rem; }
.shangdatong-brandline__item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  background: #fff;
  border: 1px solid #e3e1da;
  border-radius: 16px;
  padding: 1.4rem 1.4rem 1.2rem;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(0, 28, 36, 0.05);
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.28s ease, border-color 0.28s ease;
}
.shangdatong-brandline__item:hover { transform: translateY(-6px); border-color: #008060; box-shadow: 0 20px 44px rgba(0, 28, 36, 0.12); }
.shangdatong-brandline__item strong { font-size: 1.15rem; color: #16191f; }
.shangdatong-brandline__item span { font-size: 0.88rem; color: #545b64; line-height: 1.6; }
.shangdatong-brandline__item em { font-style: normal; font-size: 0.84rem; color: #008060; font-weight: 600; }

/* 联系大卡:页面重心,深墨绿渐变 + 大号电话 */
.shangdatong-contactcard {
  position: relative;
  overflow: hidden;
  background: linear-gradient(130deg, #03302a 0%, #064E3B 55%, #008060 130%);
  border-radius: 28px;
  padding: 3.2rem 2.4rem 2.8rem;
  text-align: center;
  color: #fff;
  box-shadow: 0 26px 70px rgba(0, 28, 36, 0.30);
}
.shangdatong-contactcard::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 82% 12%, rgba(111, 208, 190, 0.18), transparent 46%);
  pointer-events: none;
}
.shangdatong-contactcard h2 {
  position: relative;
  font-size: clamp(1.35rem, 2.4vw, 1.9rem);
  font-weight: 800;
  margin: 0.5rem auto 1.6rem;
  max-width: 26em;
}
.shangdatong-contactcard__tel {
  position: relative;
  display: inline-block;
  font-size: clamp(2.2rem, 5.4vw, 3.6rem);
  font-weight: 900;
  letter-spacing: 0.03em;
  color: #fff;
  text-decoration: none;
  font-variant-numeric: tabular-nums;
  border-bottom: 3px solid rgba(111, 208, 190, 0.6);
  padding-bottom: 0.35rem;
  transition: color 0.25s ease, border-color 0.25s ease;
}
.shangdatong-contactcard__tel:hover { color: #6fd0be; border-color: #6fd0be; }
.shangdatong-contactcard__meta { position: relative; margin: 1.3rem 0 0; font-size: 0.92rem; color: rgba(255, 255, 255, 0.75); letter-spacing: 0.04em; }
.shangdatong-contactcard__brands {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  list-style: none;
  margin: 1.7rem 0 0;
  padding: 1.5rem 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.20);
}
.shangdatong-contactcard__brands a {
  display: inline-block;
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  color: #fff;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  padding: 0.32rem 0.95rem;
  transition: background 0.25s ease, transform 0.25s ease;
}
.shangdatong-contactcard__brands a:hover { background: rgba(255, 255, 255, 0.24); transform: translateY(-2px); }

/* 联系大卡内 eyebrow 覆写(深底上) */
.shangdatong-contactcard .shangdatong-eyebrow { color: #6fd0be; }
/* 电话符号"编号"弱化为装饰 */
.shangdatong-contactcard .shangdatong-poster__num { position: static; font-size: 2.6rem; color: rgba(255, 255, 255, 0.35); display: block; line-height: 1; }

/* 移动端单列收敛 */
@media (max-width: 900px) {
  .shangdatong-who { grid-template-columns: 1fr; }
  .shangdatong-paingrid { grid-template-columns: 1fr; }
  .shangdatong-brandline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .shangdatong-poster--who { padding: 1.7rem 1.5rem 1.5rem; }
  .shangdatong-poster--pain { padding: 1.7rem 1.5rem 1.5rem; }
  .shangdatong-poster--pain .shangdatong-poster__num { font-size: 3.4rem; top: 0.7rem; right: 1rem; }
  .shangdatong-brandline { grid-template-columns: 1fr; }
  .shangdatong-contactcard { padding: 2.4rem 1.4rem 2.2rem; }
  .shangdatong-vision__points { gap: 1rem 1.4rem; }
}

@media (prefers-reduced-motion: reduce) {
  .shangdatong-reveal.is-visible .shangdatong-paingrid .shangdatong-poster { animation: none; }
  .shangdatong-poster--pain, .shangdatong-brandline__item, .shangdatong-contactcard__brands a { transition: none; }
}

/* ============ Breathing room & card balance (v2.9.0) ============ */
/* 三件事:1) /contact 痛点卡右下补母题水印、标题收敛、编号小号化;
   2) 卡片间距与区块呼吸感加大;3) 全站内页 hero 顶条加高。
   首页满屏轮播(.shangdatong-hero-carousel*)不在此列,未受影响。 */

/* --- A. 痛点卡:右侧点缀 + 字号协调 --- */
.shangdatong-poster--pain .shangdatong-poster__name { font-size: clamp(1.18rem, 1.8vw, 1.4rem); line-height: 1.5; }
.shangdatong-poster--pain .shangdatong-poster__slogan { margin-top: 1.05rem; line-height: 1.8; }
.shangdatong-poster--pain .shangdatong-poster__tag { margin-bottom: 1.2rem; }
.shangdatong-poster--pain .shangdatong-poster__num { font-size: 3.2rem; top: 1rem; right: 1.4rem; }
.shangdatong-poster--pain .shangdatong-poster__motif {
  width: clamp(90px, 10vw, 120px);
  right: 22px;
  bottom: 18px;
  opacity: 0.18;
}
.shangdatong-poster--pain .shangdatong-poster__motif svg { fill: none; stroke: #fff; stroke-width: 1.2; }
.shangdatong-poster--pain:hover .shangdatong-poster__motif { transform: scale(1.05); opacity: 0.24; }

/* 「我们是谁」卡:20+ 放大做背景水印 + 细线折线装饰 */
.shangdatong-poster--who { padding: 2.6rem 2.6rem 2.3rem; }
.shangdatong-poster--who .shangdatong-poster__num {
  top: 50%;
  right: 1.4rem;
  transform: translateY(-50%);
  font-size: clamp(6.5rem, 10vw, 9.5rem);
  color: rgba(255, 255, 255, 0.10);
}
.shangdatong-poster--who .shangdatong-poster__motif {
  width: clamp(72px, 8vw, 96px);
  right: 20px;
  bottom: 18px;
  opacity: 0.22;
}
.shangdatong-poster--who .shangdatong-poster__motif svg { fill: none; stroke: #fff; stroke-width: 1.2; }

/* --- B. 间距大气化 --- */
.shangdatong-paingrid { gap: 2.2rem 2rem; }
.shangdatong-poster--pain { padding: 2.6rem 2.6rem 2.3rem; }
.shangdatong-who { gap: 2rem; }
/* /contact 各区块纵向呼吸感(作用域限定本页 section) */
.shangdatong-section.shangdatong-contactpage { padding-block: 5.8rem; }

/* --- C. 全站内页顶部条加高(首页轮播 hero 不受影响) --- */
.shangdatong-pagehero { padding: calc(var(--shangdatong-header-h, 68px) + 7.2rem) 0 7rem; }
.shangdatong-pagehero .shangdatong-eyebrow { display: inline-block; margin-bottom: 1.1rem; }
.shangdatong-pagehero h1 { margin: 0 0 1.3rem; }
.shangdatong-pagehero p { font-size: 1.08rem; line-height: 1.75; }
.shangdatong-posterhero__stats { margin-top: 2.1rem; }

/* 移动端:单列间距 + 顶条 5–6rem */
@media (max-width: 760px) {
  .shangdatong-paingrid { gap: 1.6rem; }
  .shangdatong-poster--pain { padding: 2rem 1.7rem 1.8rem; }
  .shangdatong-poster--pain .shangdatong-poster__num { font-size: 2.6rem; top: 0.8rem; right: 1rem; }
  .shangdatong-poster--pain .shangdatong-poster__motif { width: 84px; right: 16px; bottom: 14px; }
  .shangdatong-section.shangdatong-contactpage { padding-block: 4.6rem; }
  .shangdatong-pagehero { padding: calc(var(--shangdatong-header-h, 68px) + 5.2rem) 0 5rem; }
}

@media (prefers-reduced-motion: reduce) {
  .shangdatong-poster--pain:hover .shangdatong-poster__motif,
  .shangdatong-poster--who .shangdatong-poster__motif { transition: none; }
}

/* ============ Radius & SEO polish (v3.0.0) ============ */
/* 整站圆角体系收敛:卡片/图片类 20px+ 级 → 12–14px 级;胶囊 pill(999px)与按钮保持。 */
.shangdatong-poster { border-radius: 14px; }
.shangdatong-brandcard { border-radius: 14px; }
.shangdatong-who__facts { border-radius: 14px; }
.shangdatong-contactcard { border-radius: 14px; }
.shangdatong-case { border-radius: 12px; }
.shangdatong-brandline__item { border-radius: 12px; }
.shangdatong-matrix { border-radius: 12px; }

/* ============ Cases audit polish (v3.2.0) ============ */
/* /cases 审计精修:域名行独立、方法论 5 条布局、第 5 条交错延迟。 */
.shangdatong-casep__host { display: block; margin-top: 1.15rem; font-size: 0.8rem; letter-spacing: 0.06em; color: rgba(255, 255, 255, 0.62); }
.shangdatong-poster--case .shangdatong-poster__link { margin-top: 0.6rem; }
/* 方法论 5 条:2+2+1(第 5 条通栏,移动端单列自适应) */
.shangdatong-method__item:last-child:nth-child(odd) { grid-column: 1 / -1; }
.shangdatong-reveal.is-visible .shangdatong-method > :nth-child(5) { animation-delay: 0.45s; }

/* ============ Products audit polish (v3.3.0) ============ */
/* /products 卡内业务简介小字(白字体系内,不依赖 JS 渲染);FAQ 复用整站 faq 样式。 */
.shangdatong-poster__brief {
  display: block;
  margin-top: 0.85rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.75);
}
.shangdatong-poster--p1 .shangdatong-poster__brief,
.shangdatong-poster--p2 .shangdatong-poster__brief,
.shangdatong-poster--p3 .shangdatong-poster__brief,
.shangdatong-poster--p4 .shangdatong-poster__brief,
.shangdatong-poster--p5 .shangdatong-poster__brief,
.shangdatong-poster--p6 .shangdatong-poster__brief { color: rgba(255, 255, 255, 0.75); }

/* ============ Logo & nav naming (v3.4.0) ============ */
/* 导航 logo:DEVDIY | 互联商通 单行;公司全称只在 footer 品牌区展示。 */
.shangdatong-logo__sep {
  color: #6fd0be;
  font-weight: 400;
  margin: 0 0.55rem;
  opacity: 0.75;
}

/* ============ Mega groups & mobile logo (v3.5.0) ============ */
/* 产品矩阵下拉按 4 条业务线分组:组标题小字距(桌面 4 栏列优先,组内竖排);
   移动抽屉(≤960px)纵向列表,组标题作小节头;≤960px logo 只显示 DEVDIY。 */

@media (min-width: 961px) {
  .shangdatong-nav .sub-menu {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-template-rows: repeat(3, auto);
    grid-auto-flow: column;
    gap: 0.35rem 1.1rem;
  }
}
.shangdatong-mega__group {
  padding: 0.95rem 1.2rem 0.2rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: #8a9196;
  white-space: nowrap;
}
@media (max-width: 960px) {
  .shangdatong-mega__group { padding: 1.05rem 0.5rem 0.1rem; opacity: 0.85; }
  /* 移动端 logo 精简:只显示 DEVDIY(抽屉打开同样生效,logo 在 header 上) */
  .shangdatong-logo__sep,
  .shangdatong-logo__cn,
  .shangdatong-logo small { display: none; }
}

/* ============ Mega group containers rebuild (v3.6.0) ============ */
/* 面板内容改为 4 个组容器列(组标题置顶 + 组内站点纵排);替代 v3.5.0 的独立组标题 li。 */
@media (min-width: 961px) {
  .shangdatong-nav .sub-menu.shangdatong-mega {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-template-rows: auto;
    grid-auto-flow: row;
    gap: 0;
    align-items: stretch;
  }
  .shangdatong-nav .sub-menu.shangdatong-mega .shangdatong-mega__col {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding: 0.2rem 1.2rem 0.4rem;
    min-width: 0;
  }
  .shangdatong-nav .sub-menu.shangdatong-mega .shangdatong-mega__col:first-child { padding-left: 0.2rem; }
  .shangdatong-nav .sub-menu.shangdatong-mega .shangdatong-mega__col:last-child { padding-right: 0.2rem; }
  .shangdatong-nav .sub-menu.shangdatong-mega .shangdatong-mega__col + .shangdatong-mega__col {
    border-left: 1px solid rgba(0, 128, 96, 0.10);
  }
  .shangdatong-nav .sub-menu.shangdatong-mega .shangdatong-mega__group {
    display: block;
    padding: 0.85rem 0.2rem 0;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    color: #8a9196;
  }
  .shangdatong-nav .sub-menu.shangdatong-mega .shangdatong-mega__col > a { margin-top: 0.9rem; }
  .shangdatong-nav .sub-menu.shangdatong-mega .shangdatong-mega__col > a + a { margin-top: 1.1rem; }
  .shangdatong-nav .sub-menu.shangdatong-mega a:hover { color: #008060; }
  .shangdatong-nav .sub-menu.shangdatong-mega a:hover::after { color: var(--devdiy-color-text-small, #687078); }
}
@media (max-width: 960px) {
  /* 移动抽屉:组名作小节头(浅灰小字),组内站点缩进沿用抽屉圆点样式 */
  .shangdatong-nav .sub-menu.shangdatong-mega .shangdatong-mega__col {
    display: block;
    padding: 0;
    border-left: none;
  }
  .shangdatong-nav .sub-menu.shangdatong-mega .shangdatong-mega__group {
    display: block;
    padding: 1.05rem 0.5rem 0.15rem;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    color: rgba(255, 255, 255, 0.55);
  }
  .shangdatong-nav .sub-menu.shangdatong-mega .shangdatong-mega__col > a { margin-top: 0; padding-left: 1.6rem; }
}

/* ============ WeChat QR popover (v3.6.2) ============ */
/* 页脚微信公众号图标:点击弹出二维码弹层。
   桌面(>960px)tooltip 弹层在图标上方居中,小箭头指向图标;
   移动(≤960px)全屏半透明遮罩 + 卡片正中,点遮罩任意处关闭。
   no-JS 优雅降级:弹层默认 display:none,仅 JS 加 .is-open 才显示,
   无 JS 时按钮存在但点击无副作用、弹层永不出现。 */
.shangdatong-social .shangdatong-social__qrwrap { position: relative; display: inline-flex; }
.shangdatong-social .shangdatong-social--qr {
  /* 与其余社媒图标同一圆形底座(42px + 19px 图标,v2.2 图标语言) */
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  margin-top: 0; /* 覆盖容器 .shangdatong-social 的 margin-top */
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  background: transparent;
  color: #fff;
  font: inherit;
  cursor: pointer;
  transition: color 0.2s ease, transform 0.2s ease;
}
.shangdatong-social .shangdatong-social--qr:hover { color: #6fd0be; transform: translateY(-3px); }
.shangdatong-social .shangdatong-social--qr:focus-visible { outline: 2px solid #6fd0be; outline-offset: 2px; }
.shangdatong-social .shangdatong-social--qr svg { width: 19px; height: 19px; fill: currentColor; }

/* 定位层:桌面 absolute 悬浮,移动 fixed 全屏遮罩 */
.shangdatong-qrpop {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  width: min(340px, calc(100vw - 32px)); /* 显式宽度:否则 absolute shrink-to-fit 收缩到 42px 容器内,img 再被 max-width:100% 压扁 */
  z-index: 60;
  display: none;
  opacity: 0;
  transition: opacity 0.22s ease, transform 0.22s ease;
}
.shangdatong-social__qrwrap.is-open .shangdatong-qrpop {
  display: block;
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
/* 白底圆角小卡片 + 底部小箭头指向图标 */
.shangdatong-qrpop__card {
  display: block;
  padding: 1rem 1rem 0.7rem;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 18px 44px rgba(0, 28, 36, 0.22);
  text-align: center;
}
.shangdatong-qrpop::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 7px solid transparent;
  border-top-color: #fff;
}
.shangdatong-qrpop img { display: block; width: 300px; height: auto; border-radius: 8px; }
.shangdatong-qrpop__text {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: #545b64;
  white-space: nowrap;
}

/* 移动端(≤960px):全屏半透明遮罩(与移动抽屉遮罩 .sdt-nav-mask 同风格)+ 卡片正中 */
@media (max-width: 960px) {
  body.sdt-qr-open { overflow: hidden; }
  .shangdatong-qrpop {
    position: fixed;
    width: auto; /* 移动端全屏遮罩由 left/right:0 决定,不受桌面显式宽度影响 */
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 998;
    display: none;
    align-items: center;
    justify-content: center;
    transform: none; /* 关键:重置桌面 left:50%+translateX(-50%),否则全屏遮罩整体左移半屏,卡片被推出屏外 */
    background: rgba(0, 0, 0, 0.5);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
    transition: opacity 0.3s ease;
  }
  .shangdatong-social__qrwrap.is-open .shangdatong-qrpop { display: flex; transform: none; }
  .shangdatong-qrpop::after { display: none; }
  .shangdatong-qrpop__card {
    width: min(240px, calc(100vw - 56px));
    max-height: min(78vh, 640px);
    overflow: auto;
    padding: 0.9rem 0.9rem 0.8rem;
    border-radius: 14px;
  }
  .shangdatong-qrpop img { width: 100%; max-height: 62vh; object-fit: contain; border-radius: 10px; }
  .shangdatong-qrpop__text { margin-top: 0.6rem; color: rgba(255, 255, 255, 0.85); }
}

/* ============ Footer redesign (v3.8.0) ============ */
/* 深色渐变 + 顶部能量线(带数据流动画)+ 低透明网格纹理 + 母品牌水印;
   三层结构:品牌区(左)/ 品牌矩阵·快速导航(右)/ 底 bar。 */

.shangdatong-footer {
  background: linear-gradient(180deg, #0b1614 0%, #0e1d1a 55%, #0b1614 100%);
  padding-top: 4.6rem;
}
/* 装饰层:纹理 + 母品牌水印(独立容器 overflow hidden,不影响 QR 弹层) */
.shangdatong-footer__deco {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.shangdatong-footer__texture {
  position: absolute;
  inset: 0;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='28'%3E%3Cpath d='M28 0H0v28' fill='none' stroke='%236fd0be' stroke-width='0.5'/%3E%3C/svg%3E");
  background-size: 28px 28px;
}
.shangdatong-footer__watermark {
  position: absolute;
  right: -1.2rem;
  bottom: -2.4rem;
  font-size: clamp(7rem, 15vw, 14rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1;
  color: rgba(111, 208, 190, 0.045);
  user-select: none;
  white-space: nowrap;
}
/* 顶部能量线:1px 渐变 + 光晕,叠加缓慢平移的 mint 数据流高光(纯 CSS) */
.shangdatong-footer__beam {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  z-index: 1;
  background: linear-gradient(90deg, transparent, rgba(111, 208, 190, 0.4) 25%, rgba(111, 208, 190, 0.75) 50%, rgba(111, 208, 190, 0.4) 75%, transparent);
  box-shadow: 0 0 16px rgba(111, 208, 190, 0.4), 0 0 42px rgba(111, 208, 190, 0.15);
}
.shangdatong-footer__beam::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(111, 208, 190, 0.9) 45%, #eafff9 50%, rgba(111, 208, 190, 0.9) 55%, transparent 100%);
  background-size: 220% 100%;
  background-repeat: no-repeat;
  animation: sdtFooterFlow 22s linear infinite;
  opacity: 0.85;
}
@keyframes sdtFooterFlow {
  from { background-position: 0% 0; }
  to { background-position: 100% 0; }
}
@media (prefers-reduced-motion: reduce) {
  .shangdatong-footer__beam::after { animation: none; opacity: 0.3; }
}
/* 内容层压过装饰层;QR 弹层(z-index 60)在内容层内不受影响 */
.shangdatong-footer .shangdatong-footer__grid,
.shangdatong-footer .shangdatong-footer__bar { position: relative; z-index: 2; }

/* 栅格:品牌区更宽,呼吸感 padding */
.shangdatong-footer .shangdatong-footer__grid {
  grid-template-columns: 1.75fr 1.05fr 0.85fr 1.25fr;
  gap: 3rem;
  padding-top: 0.6rem;
  padding-bottom: 3.8rem;
}

/* 品牌区:导航 logo 语言(DEVDIY | 互联商通)+ 定位语 + 社媒行 */
.shangdatong-footer__logosep {
  color: #6fd0be;
  font-weight: 400;
  margin: 0 0.55rem;
  opacity: 0.9;
  text-shadow: 0 0 12px rgba(111, 208, 190, 0.55);
}
.shangdatong-footer__logocn { font-weight: 600; }
.shangdatong-footer .shangdatong-footer__brand small { margin-bottom: 1.3rem; }
.shangdatong-footer .shangdatong-footer__brand p {
  line-height: 1.85;
  color: #7e8f8d;
  max-width: 26em;
}
.shangdatong-footer .shangdatong-social {
  margin-top: 1.7rem;
  flex-wrap: wrap;
}
.shangdatong-footer .shangdatong-social a,
.shangdatong-footer .shangdatong-social .shangdatong-social--qr { border-color: rgba(111, 208, 190, 0.24); }

/* 列标题:小字号 + 大字距 + 低透明度 */
.shangdatong-footer .shangdatong-footer__col h4,
.shangdatong-footer .shangdatong-footer__contact h4 {
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.42);
  margin: 0.4rem 0 1.35rem;
}
.shangdatong-footer .shangdatong-footer__col li,
.shangdatong-footer .shangdatong-footer__contact li {
  margin-bottom: 0.7rem;
  line-height: 1.7;
  color: #93a3a1;
}
.shangdatong-footer .shangdatong-footer__col a { color: #e6ecec; opacity: 0.92; }
.shangdatong-footer .shangdatong-footer__col a:hover { color: #6fd0be; opacity: 1; }

/* 联系区:热线大字白 + 光晕,邮箱/官网 */
.shangdatong-footer .shangdatong-footer__phone a {
  font-size: 1.7rem;
  text-shadow: 0 0 22px rgba(111, 208, 190, 0.22);
}
.shangdatong-footer .shangdatong-footer__phone small { color: rgba(255, 255, 255, 0.42); }
.shangdatong-footer .shangdatong-footer__contact li:first-child { color: #cfdad9; }

/* 底 bar:发光渐变分隔线(替代旧白线),低透明小字 */
.shangdatong-footer .shangdatong-footer__bar {
  border-top: 1px solid transparent;
  background-image: linear-gradient(90deg, transparent, rgba(111, 208, 190, 0.35), transparent);
  background-repeat: no-repeat;
  background-size: 100% 1px;
  padding: 1.7rem 0 2rem;
  font-size: 0.8rem;
  color: #6e7c7b;
}

@media (max-width: 900px) {
  .shangdatong-footer .shangdatong-footer__grid { grid-template-columns: 1fr 1fr; gap: 2.4rem; padding-bottom: 3rem; }
  .shangdatong-footer__watermark { font-size: 9rem; opacity: 0.7; }
}
@media (max-width: 560px) {
  .shangdatong-footer { padding-top: 3.6rem; }
  .shangdatong-footer .shangdatong-footer__grid { grid-template-columns: 1fr; gap: 2.1rem; padding-bottom: 2.4rem; }
  .shangdatong-footer .shangdatong-footer__phone a { font-size: 1.55rem; }
  .shangdatong-footer .shangdatong-footer__bar { padding: 1.4rem 0 1.6rem; }
  .shangdatong-footer__watermark { font-size: 6rem; right: -0.6rem; bottom: -1.4rem; }
}

/* ============ Footer redesign v3.9.0 (clean black + bright text + focal slogan) ============ */
/* 针对五条痛点:①纯净中性近黑背景+极微 mint 径向光晕 ②文字整体提亮 ③渐变字 DEVDIY
   + mint 金句 slogan + 品牌区上方能量线 ④padding/gap/行距全面拉开 ⑤层级:品牌区与
   联系区最亮、链接区中亮、底 bar 最暗。 */

/* ① 背景:零绿相中性近黑 */
.shangdatong-footer {
  background: linear-gradient(180deg, #0d1117 0%, #12161c 55%, #0d1117 100%);
  padding-top: 5.5rem;
}
.shangdatong-footer .shangdatong-footer__deco::before {
  content: "";
  position: absolute;
  top: -30%;
  left: -10%;
  width: 70%;
  height: 80%;
  background: radial-gradient(ellipse at center, rgba(111, 208, 190, 0.07), transparent 65%);
}
.shangdatong-footer .shangdatong-footer__texture { opacity: 0.03; }
.shangdatong-footer .shangdatong-footer__watermark { color: rgba(111, 208, 190, 0.028); }

/* ④ 呼吸感:大间距 + 宽行距 */
.shangdatong-footer .shangdatong-footer__grid {
  grid-template-columns: 1.75fr 1fr 0.85fr 1.3fr;
  gap: 4rem;
  padding-top: 0.4rem;
  padding-bottom: 4.2rem;
}
.shangdatong-footer .shangdatong-footer__col li,
.shangdatong-footer .shangdatong-footer__contact li {
  margin-bottom: 0.8rem;
  line-height: 1.9;
}

/* ② 文字提亮:链接 #c9d4d8 级,hover 仍 mint */
.shangdatong-footer .shangdatong-footer__col li,
.shangdatong-footer .shangdatong-footer__contact li { color: #c9d4d8; }
.shangdatong-footer .shangdatong-footer__col a { color: #c9d4d8; opacity: 1; }
.shangdatong-footer .shangdatong-footer__col a:hover { color: #6fd0be; }
.shangdatong-footer .shangdatong-footer__contact li:first-child { color: #e2eaea; }
.shangdatong-footer .shangdatong-footer__bar { color: #8a979c; }

/* 组标题:mint 小标题(页面亮点色) */
.shangdatong-footer .shangdatong-footer__col h4,
.shangdatong-footer .shangdatong-footer__contact h4 {
  color: #dde6e8; /* 用户定稿:暗白(非纯白),替代 mint;v3.9.3 */
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  margin: 0.3rem 0 1.5rem;
}

/* ③ 亮点:能量线移到品牌标上方(短线条更聚焦) */
.shangdatong-footer .shangdatong-footer__brand .shangdatong-footer__beam {
  position: relative;
  top: auto;
  left: auto;
  right: auto;
  width: min(300px, 100%);
  margin: 0 0 1.5rem;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, #6fd0be, rgba(111, 208, 190, 0.35) 70%, transparent);
  box-shadow: 0 0 14px rgba(111, 208, 190, 0.55), 0 0 36px rgba(111, 208, 190, 0.2);
}

/* 渐变字 DEVDIY(白 → mint → 白),分隔符保持 mint、互联商通保持近白 */
.shangdatong-footer .shangdatong-footer__brand strong {
  font-size: clamp(2rem, 4vw, 2.6rem);
  background: linear-gradient(100deg, #ffffff 12%, #9fe8d8 48%, #ffffff 85%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  margin-bottom: 0.5rem;
}
.shangdatong-footer .shangdatong-footer__logosep {
  -webkit-text-fill-color: #6fd0be;
  color: #6fd0be;
  text-shadow: 0 0 14px rgba(111, 208, 190, 0.6);
}
.shangdatong-footer .shangdatong-footer__logocn {
  -webkit-text-fill-color: #eef6f4;
  color: #eef6f4;
}

/* 金句 slogan:一行大字,「上网/出海」mint 高亮 */
.shangdatong-footer .shangdatong-footer__slogan {
  margin: 1.5rem 0 0.75rem;
  font-size: 1.18rem;
  font-weight: 600;
  line-height: 1.6;
  color: #eef4f3;
  letter-spacing: 0.01em;
}
.shangdatong-footer .shangdatong-footer__slogan .shangdatong-footer__hl {
  color: #fff;
  font-weight: 700;
  text-shadow: 0 0 18px rgba(111, 208, 190, 0.35);
}
.shangdatong-footer .shangdatong-footer__meta {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.9;
  color: #9fb0ae;
  max-width: 26em;
}

/* 联系区:热线再放大,形成强对比层级 */
.shangdatong-footer .shangdatong-footer__phone a {
  font-size: 1.9rem;
  text-shadow: 0 0 26px rgba(111, 208, 190, 0.28);
}
.shangdatong-footer .shangdatong-footer__phone small { color: rgba(255, 255, 255, 0.45); }
.shangdatong-footer .shangdatong-footer__mail a,
.shangdatong-footer .shangdatong-footer__contact li a { color: #c9d4d8; }
.shangdatong-footer .shangdatong-footer__mail a:hover,
.shangdatong-footer .shangdatong-footer__contact li a:hover { color: #6fd0be; }

/* ④ 底 bar:分隔线上下各留 2rem+ */
.shangdatong-footer .shangdatong-footer__bar {
  padding: 2.1rem 0 2.3rem;
  font-size: 0.8rem;
}

@media (max-width: 900px) {
  .shangdatong-footer .shangdatong-footer__grid { gap: 2.6rem; padding-bottom: 3.2rem; }
}
@media (max-width: 560px) {
  .shangdatong-footer { padding-top: 4.2rem; }
  .shangdatong-footer .shangdatong-footer__grid { grid-template-columns: 1fr; gap: 2.4rem; padding-bottom: 2.6rem; }
  .shangdatong-footer .shangdatong-footer__brand .shangdatong-footer__beam { width: 100%; margin-bottom: 1.2rem; }
  .shangdatong-footer .shangdatong-footer__slogan { font-size: 1.12rem; margin-top: 1.3rem; }
  .shangdatong-footer .shangdatong-footer__phone a { font-size: 1.65rem; }
  .shangdatong-footer .shangdatong-footer__bar { padding: 1.7rem 0 1.9rem; }
  .shangdatong-footer__watermark { font-size: 5.5rem; right: -0.5rem; bottom: -1.2rem; }
}

/* ============ Footer social baseline fix (v3.9.2) ============ */
/* 微信 button 自带 .shangdatong-social 类,命中 .shangdatong-footer .shangdatong-social
   的 margin-top 被推低 1.7rem,导致社媒行首图标错位;3 类优先级显式归零对齐 */
.shangdatong-footer .shangdatong-social .shangdatong-social--qr { margin-top: 0; }

/* ============ Footer col heading accent (v3.10.0) ============ */
/* 栏目标题:字号加大提亮,文字下方加 mint 渐变半下划线点缀,与正文拉开层级 */
.shangdatong-footer .shangdatong-footer__col h4,
.shangdatong-footer .shangdatong-footer__contact h4 {
  color: #eef4f5;
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  position: relative;
  padding-bottom: 0.6rem;
  margin: 0.3rem 0 1.5rem;
}
.shangdatong-footer .shangdatong-footer__col h4::after,
.shangdatong-footer .shangdatong-footer__contact h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, #6fd0be, rgba(111, 208, 190, 0));
}

/* ============ Float consult rail (v3.11.0,对齐 devdiy.cn 交互) ============ */
/* 右侧悬浮:免费诊断(绿,→/contact/)+ 微信(hover/focus 左滑出二维码)+ 右缘细条关闭 */
.sdt-float-rail-wrap {
  position: fixed;
  right: 0;
  bottom: 220px;
  z-index: 999;
  display: flex;
  align-items: stretch;
}
.sdt-float-rail-wrap.is-hidden { display: none; }
.sdt-float-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.12);
}
.sdt-float-item { position: relative; width: 64px; list-style: none; }
.sdt-float-item--diagnose > a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 64px;
  height: 72px;
  padding: 8px 4px 6px;
  box-sizing: border-box;
  border-radius: 8px 0 0 0;
  background: #008060;
  color: #fff;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.sdt-float-item--diagnose > a:hover {
  background: #006b4f;
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(0, 128, 96, 0.28);
  color: #fff;
}
.sdt-float-item--wechat > a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 64px;
  height: 64px;
  padding: 8px 4px 6px;
  box-sizing: border-box;
  border-radius: 0 0 0 8px;
  background: #475569;
  color: #f8fafc;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.sdt-float-item--wechat > a:hover {
  background: #334155;
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(15, 23, 42, 0.18);
  color: #fff;
}
.sdt-float-ico { display: block; line-height: 1; }
.sdt-float-ico svg { display: block; width: 20px; height: 20px; }
.sdt-float-name {
  display: block;
  width: 100%;
  color: inherit;
  font-size: 11px;
  font-weight: 600;
  line-height: 1.25;
  text-align: center;
  white-space: normal;
}
/* 二维码弹层:hover/focus-within 左滑出(devdiy.cn 同款) */
.sdt-float-qrpop {
  display: block;
  position: absolute;
  right: calc(100% + 12px);
  top: 0;
  width: 160px;
  padding: 12px 10px;
  box-sizing: border-box;
  background: #fff;
  border: 1px solid #eee;
  border-radius: 6px;
  text-align: center;
  color: #666;
  font-size: 13px;
  line-height: 1.4;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(10px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}
.sdt-float-qrpop img {
  display: block;
  width: 140px;
  height: 140px;
  margin: 0 auto 6px;
  object-fit: cover;
}
.sdt-float-item--wechat:hover .sdt-float-qrpop,
.sdt-float-item--wechat:focus-within .sdt-float-qrpop {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(0);
}
/* 右缘细条关闭按钮 */
.sdt-float-close {
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: stretch;
  width: 16px;
  padding: 0;
  margin: 0;
  border: none;
  background: #334155;
  color: #e2e8f0;
  font-size: 12px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}
.sdt-float-close:hover { background: #1e293b; color: #fff; }
.sdt-float-close span { display: block; font-weight: 500; }
@media (max-width: 960px) {
  .sdt-float-rail-wrap { bottom: 160px; }
}

/* ============ QR popover arrow track (v3.9.4/3.9.5) ============ */
/* 箭头位置:用户定稿 left 30%(基础规则的 translateX(-50%) 保留,居中于该点) */
.shangdatong-qrpop::after { left: 30%; }