/* ==========================================================================
   德晟科技 · 官网样式
   主色 #1E98D7 · 科技深蓝 · 思源黑体
   ========================================================================== */

/* ---------- 设计令牌 ---------- */
:root {
  --brand: #1E98D7;
  --brand-light: #5BD0FF;
  --brand-deep: #0F6FA8;
  --ink: #0A2540;          /* 深邃科技蓝（标题/正文） */
  --ink-2: #1F3A5F;
  --body: #475569;         /* 次要正文 */
  --muted: #94A3B8;
  --line: #E6EDF3;
  --bg: #F5F7FA;           /* 原型背景色 */
  --bg-2: #EEF3F8;
  --white: #FFFFFF;

  --nav-h: 72px;
  --maxw: 1200px;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow-sm: 0 4px 16px rgba(15, 37, 64, .06);
  --shadow: 0 18px 48px rgba(15, 37, 64, .10);
  --shadow-brand: 0 16px 40px rgba(30, 152, 215, .28);

  --ease: cubic-bezier(.22, 1, .36, 1);
  --ff: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans CN", "Noto Sans CJK SC", sans-serif;
  --ff-num: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, var(--ff);
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--ff);
  color: var(--body);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
h1, h2, h3, h4 { color: var(--ink); font-weight: 700; line-height: 1.3; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- 按钮 ---------- */
.btn {
  --btn-bg: var(--brand);
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 30px; border-radius: 999px;
  font-weight: 500; font-size: 15px; letter-spacing: .02em;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), background .3s;
  white-space: nowrap;
}
.btn--primary { background: var(--brand); color: #fff; box-shadow: var(--shadow-brand); }
.btn--primary:hover { transform: translateY(-3px); background: var(--brand-deep); box-shadow: 0 20px 48px rgba(30,152,215,.42); }
.btn--ghost { background: rgba(255,255,255,.08); color: #fff; border-color: rgba(255,255,255,.4); backdrop-filter: blur(6px); }
.btn--ghost:hover { background: rgba(255,255,255,.18); transform: translateY(-3px); }
.btn--lg { padding: 16px 40px; font-size: 16px; }

.link-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--brand); font-weight: 500; font-size: 17px;
  transition: gap .3s var(--ease);
}
.link-arrow:hover { gap: 14px; }
.link-arrow span { transition: transform .3s var(--ease); }

/* ==========================================================================
   导航
   ========================================================================== */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 100;
  height: var(--nav-h);
  transition: background .4s var(--ease), box-shadow .4s var(--ease), height .4s var(--ease);
}
.nav__inner {
  height: 100%; display: flex; align-items: center; gap: 32px;
}
.nav__brand { display: flex; align-items: center; }
.nav__logo { height: 38px; width: auto; transition: filter .4s; filter: brightness(0) invert(1); }

.nav__menu { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.nav__link {
  position: relative; padding: 10px 16px; font-size: 15px; font-weight: 400;
  color: rgba(255,255,255,.85); border-radius: 8px;
  transition: color .3s;
}
.nav__link::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: 4px; height: 2px;
  background: var(--brand-light); border-radius: 2px;
  transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease);
}
.nav__link:hover, .nav__link.is-active { color: #fff; }
.nav__link:hover::after, .nav__link.is-active::after { transform: scaleX(1); }

.nav__item--has-panel { position: relative; }
.nav__item--has-panel > .nav__link { padding-right: 26px; }
.nav__item--has-panel > .nav__link::before {
  content: ""; position: absolute; right: 10px; top: 50%;
  width: 6px; height: 6px;
  border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor;
  transform: translateY(-50%) rotate(45deg); opacity: .7;
  transition: transform .3s;
}
.nav__item--has-panel:hover .nav__link::before { transform: translateY(calc(-50% + 4px)) rotate(225deg); }

/* 下拉面板 */
.megapanel {
  position: absolute; top: 100%; left: 50%; transform: translate(-50%, 12px);
  background: #fff; border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 24px; min-width: 340px; width: max-content; max-width: 720px;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity .3s var(--ease), transform .3s var(--ease);
  border: 1px solid var(--line);
}
.nav__item--has-panel:hover .megapanel { opacity: 1; visibility: visible; pointer-events: auto; transform: translate(-50%, 6px); }
.megapanel__grid { display: grid; grid-template-columns: minmax(280px, auto) minmax(220px, auto); gap: 32px; }
.megapanel__col { min-width: 0; }
.megapanel__title { font-size: 13px; color: var(--brand); font-weight: 700; margin-bottom: 12px; letter-spacing: .05em; }
.megapanel__desc { font-size: 12px; color: var(--muted); margin-bottom: 12px; line-height: 1.5; }
.megapanel__list li a {
  display: block; padding: 8px 0; font-size: 14px; color: var(--ink-2);
  border-bottom: 1px solid var(--bg-2); transition: color .25s, padding .25s;
  white-space: nowrap;
}
.megapanel__list li:last-child a { border-bottom: 0; }
.megapanel__list li a:hover { color: var(--brand); padding-left: 6px; }
.megapanel--simple { min-width: 200px; padding: 14px 8px; }
.megapanel__list--inline li a { border-bottom: 0; padding: 9px 18px; border-radius: 8px; }
.megapanel__list--inline li a:hover { background: var(--bg); padding-left: 18px; }

.nav__phone {
  display: inline-flex; align-items: center; gap: 8px;
  color: #fff; font-weight: 500; font-size: 15px;
  padding: 9px 18px; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.3); background: rgba(255,255,255,.08);
  backdrop-filter: blur(6px);
  transition: background .3s, border-color .3s;
}
.nav__phone:hover { background: rgba(255,255,255,.18); border-color: rgba(255,255,255,.5); }
.icon-phone { width: 16px; height: 16px; fill: currentColor; }

/* 滚动后导航变白 */
.nav.is-scrolled { background: rgba(255,255,255,.92); backdrop-filter: blur(16px); box-shadow: var(--shadow-sm); height: 64px; }
.nav.is-scrolled .nav__link { color: var(--ink-2); }
.nav.is-scrolled .nav__link:hover, .nav.is-scrolled .nav__link.is-active { color: var(--brand); }
.nav.is-scrolled .nav__link::after { background: var(--brand); }
.nav.is-scrolled .nav__logo { filter: none; }
.nav.is-scrolled .nav__phone { color: var(--brand); border-color: var(--line); background: var(--bg); }

/* 移动端汉堡 */
.nav__toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav__toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: .3s; }
.nav.is-scrolled .nav__toggle span { background: var(--ink); }

/* ==========================================================================
   Hero（多图轮播 Banner）
   ========================================================================== */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  overflow: hidden;
}
/* 背景层：多张图叠放，is-active 控制淡入 */
.hero__slides { position: absolute; inset: 0; }
.hero__slide {
  position: absolute; inset: 0; background-size: cover; background-position: center;
  opacity: 0; transform: scale(1.08);
  transition: opacity 1.2s var(--ease);
  animation: heroZoom 18s ease-in-out infinite alternate;
}
.hero__slide.is-active { opacity: 1; z-index: 1; }
@keyframes heroZoom { to { transform: scale(1.16); } }
.hero__overlay {
  position: absolute; inset: 0; z-index: 2;
  background:
    linear-gradient(110deg, rgba(10,37,64,.88) 0%, rgba(10,37,64,.6) 45%, rgba(15,111,168,.35) 100%);
}
.hero__content { position: relative; z-index: 3; padding-top: var(--nav-h); width: 100%; }
.hero__panes { max-width: 820px; }
.hero__pane { display: none; }
.hero__pane.is-active { display: block; }
.hero__eyebrow {
  display: inline-block; font-size: 14px; letter-spacing: .2em; color: var(--brand-light);
  font-weight: 500; margin-bottom: 20px; padding: 6px 16px;
  border: 1px solid rgba(91,208,255,.4); border-radius: 999px;
  background: rgba(91,208,255,.08);
}
.hero__title {
  font-size: clamp(30px, 4.6vw, 56px); font-weight: 900; color: #fff;
  line-height: 1.25; letter-spacing: .01em; margin-bottom: 22px;
}
.hero__sub { font-size: clamp(15px, 1.8vw, 20px); color: rgba(255,255,255,.82); margin-bottom: 38px; max-width: 600px; }
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* 左右箭头 */
.hero__arrow {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 4;
  width: 48px; height: 48px; border-radius: 50%;
  display: grid; place-items: center; cursor: pointer;
  background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.35);
  backdrop-filter: blur(6px);
  transition: transform .35s var(--ease), background .3s, color .3s;
}
.hero__arrow:hover { background: var(--brand); color: #fff; transform: translateY(-50%) scale(1.08); border-color: var(--brand); }
.hero__arrow--prev { left: clamp(16px, 4vw, 56px); }
.hero__arrow--next { right: clamp(16px, 4vw, 56px); }

/* 底部圆点指示器 */
.hero__dots {
  position: absolute; bottom: 72px; left: 50%; transform: translateX(-50%); z-index: 4;
  display: flex; gap: 10px;
}
.hero__dot {
  width: 10px; height: 10px; padding: 0; border-radius: 999px; cursor: pointer;
  background: rgba(255,255,255,.45); border: none;
  transition: width .4s var(--ease), background .3s;
}
.hero__dot.is-active { width: 28px; background: var(--brand-light); }

.hero__scroll {
  position: absolute; bottom: 22px; left: 50%; transform: translateX(-50%); z-index: 4;
  display: flex; justify-content: center;
}
.hero__mouse {
  width: 26px; height: 42px; border: 2px solid rgba(255,255,255,.5); border-radius: 14px;
  display: flex; justify-content: center; padding-top: 7px;
}
.hero__wheel { width: 4px; height: 9px; background: #fff; border-radius: 2px; animation: wheel 1.6s infinite; }
@keyframes wheel { 0% { opacity: 1; transform: translateY(0); } 100% { opacity: 0; transform: translateY(14px); } }

/* ==========================================================================
   通用 Section
   ========================================================================== */
.section { padding: 72px 0; }
.section__head { margin-bottom: 44px; }
.section__head--center { text-align: center; max-width: 720px; margin-left: auto; margin-right: auto; }
.section__title { font-size: clamp(26px, 3.2vw, 40px); font-weight: 900; color: var(--ink); }
.section__head--center .section__title::after {
  content: ""; display: block; width: 52px; height: 4px; background: var(--brand);
  border-radius: 2px; margin: 18px auto 0;
}
.section__lead { color: var(--body); font-size: 16px; margin-top: 18px; }

/* ==========================================================================
   我们的服务
   ========================================================================== */
.services { background: linear-gradient(180deg, var(--bg) 0%, #fff 100%); }
.values {
  position: relative; width: 100%;
  display: flex; align-items: center; justify-content: center;
  isolation: isolate; /* 让 z-index 在此容器内分层 */
}
/* 背景：ECharts 中国地图 */
.values__map {
  position: absolute; inset: 0; z-index: 0;
  width: 100%; height: 100%;
  opacity: .55; pointer-events: none;
  overflow: visible;
}
.values__map canvas { width: 100% !important; height: 100% !important; }

/* 上层：四张价值卡片，绝对定位钉在四角，对称浮在地图之上 */
.values__cards {
  position: relative; z-index: 2;
  width: 100%; max-width: 1200px; height: 520px;
  margin: 0 auto;
}
.value-card {
  position: absolute;
  width: 290px; max-width: calc(50vw - 24px);
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(10px) saturate(1.1);
  -webkit-backdrop-filter: blur(10px) saturate(1.1);
  border: 1px solid rgba(255, 255, 255, .6);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: 0 8px 32px rgba(30, 152, 215, .12);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
  overflow: hidden; text-align: left;
}
/* 四角定位：左上 / 右上 / 左下 / 右下 */
.value-card:nth-child(1) { top: 0; left: 0; }
.value-card:nth-child(2) { top: 0; right: 0; }
.value-card:nth-child(3) { bottom: 0; left: 0; }
.value-card:nth-child(4) { bottom: 0; right: 0; }
.value-card::before {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 3px; background: var(--brand);
  transform: scaleX(0); transform-origin: left; transition: transform .4s var(--ease);
}
.value-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px rgba(30, 152, 215, .22);
  background: rgba(255, 255, 255, .92);
}
.value-card:hover::before { transform: scaleX(1); }
.value-card__num { font-family: var(--ff-num); font-size: 13px; font-weight: 700; color: var(--brand); opacity: .55; letter-spacing: .1em; }
.value-card__title { font-size: 20px; margin: 4px 0 6px; color: var(--ink); }
.value-card__desc { font-size: 13px; line-height: 1.55; color: var(--body); }

/* ==========================================================================
   产品中心
   ========================================================================== */
.products { background: #fff; }
.products__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-bottom: 56px; }
.product-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 36px 30px; transition: transform .4s var(--ease), box-shadow .4s var(--ease);
  position: relative; overflow: hidden;
}
.product-card::after {
  content: ""; position: absolute; inset: 0; border-radius: var(--radius); padding: 2px;
  background: linear-gradient(135deg, var(--brand-light), var(--brand));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .4s;
}
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.product-card:hover::after { opacity: 1; }
.product-card__icon {
  width: 64px; height: 64px; border-radius: 16px;
  background: linear-gradient(135deg, rgba(30,152,215,.12), rgba(91,208,255,.18));
  display: grid; place-items: center; margin-bottom: 22px;
}
.product-card__icon svg { width: 34px; height: 34px; fill: var(--brand); }
.product-card__title { font-size: 22px; margin-bottom: 10px; }
.product-card__desc { font-size: 14px; color: var(--body); margin-bottom: 18px; }
.product-card__tags { display: flex; flex-wrap: wrap; gap: 8px; }
.product-card__tags li { font-size: 12px; color: var(--brand-deep); background: var(--bg-2); padding: 5px 12px; border-radius: 999px; }

.products__cta {
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  background: linear-gradient(120deg, var(--ink) 0%, var(--brand-deep) 100%);
  border-radius: var(--radius); padding: 40px 48px; color: #fff;
}
.products__cta h3 { color: #fff; font-size: 24px; margin-bottom: 6px; }
.products__cta p { color: rgba(255,255,255,.75); font-size: 15px; }

/* ==========================================================================
   解决方案
   ========================================================================== */
.solution { padding: 110px 0; }
.solution--alt { background: var(--bg); }
.solution__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.solution__inner--reverse .solution__media { order: 2; }
.solution__media { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.solution__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.solution__media:hover img { transform: scale(1.05); }
.solution__badge {
  position: absolute; top: 20px; left: 20px;
  background: rgba(10,37,64,.7); color: var(--brand-light); backdrop-filter: blur(6px);
  padding: 7px 16px; border-radius: 999px; font-size: 13px; font-weight: 500; letter-spacing: .05em;
}
.solution__title { font-size: clamp(24px, 2.8vw, 36px); font-weight: 900; margin-bottom: 18px; }
.solution__desc { font-size: 16px; color: var(--body); margin-bottom: 24px; }
.solution__points { margin-bottom: 30px; }
.solution__points li {
  position: relative; padding: 11px 0 11px 34px; font-size: 15px; color: var(--ink-2);
  border-bottom: 1px dashed var(--line);
}
.solution__points li::before {
  content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--brand); box-shadow: 0 0 0 5px rgba(30,152,215,.15);
}
.solution__points li::after {
  content: "✓"; position: absolute; left: 5px; top: 50%; transform: translateY(-50%);
  color: #fff; font-size: 12px; font-weight: 700;
}

/* ==========================================================================
   合作客户
   ========================================================================== */
.clients { background: #fff; }
.clients__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.client-tile {
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 36px 20px; text-align: center;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), background .35s;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
}
.client-tile span { font-size: 22px; font-weight: 700; color: var(--ink); }
.client-tile small { font-size: 12px; color: var(--muted); }
.client-tile:hover { transform: translateY(-6px); box-shadow: var(--shadow-sm); background: #fff; border-color: transparent; }
.client-tile:hover span { color: var(--brand); }

/* ==========================================================================
   联系我们
   ========================================================================== */
.contact { background: linear-gradient(180deg, var(--bg) 0%, #fff 100%); }
.contact__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-bottom: 48px; }
.contact-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 44px 30px; text-align: center; box-shadow: var(--shadow-sm);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
}
.contact-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.contact-card__circle {
  width: 84px; height: 84px; border-radius: 50%; margin: 0 auto 22px;
  display: grid; place-items: center; box-shadow: var(--shadow-brand);
  transition: transform .4s var(--ease);
}
.contact-card:hover .contact-card__circle { transform: scale(1.08) rotate(6deg); }
.contact-card__circle svg { width: 38px; height: 38px; fill: #fff; }
.contact-card__title { font-size: 19px; margin-bottom: 12px; }
.contact-card__desc { font-size: 14px; color: var(--body); }
.contact__cta { text-align: center; }

/* ==========================================================================
   页脚
   ========================================================================== */
.footer { background: var(--ink); color: rgba(255,255,255,.7); padding: 64px 0 28px; }
.footer__inner {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; align-items: start;
  padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer__brand img { height: 34px; filter: brightness(0) invert(1); margin-bottom: 14px; }
.footer__brand p { font-size: 13px; line-height: 1.7; letter-spacing: .04em; }
.footer__nav { display: flex; flex-direction: column; gap: 12px; }
.footer__nav a { font-size: 14px; transition: color .25s; width: fit-content; }
.footer__nav a:hover { color: var(--brand-light); }
.footer__contact { display: grid;align-items: flex-start;justify-content: flex-end;gap: 9px; }
.footer__contact span { display: block; font-size: 13px; margin-bottom: 6px; }
.footer__contact strong { font-family: var(--ff-num); font-size: 26px; color: #fff; font-weight: 700; }
.footer__bottom {
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  padding-top: 24px; font-size: 13px;
}
.footer__icp { transition: color .25s; }
.footer__icp:hover { color: var(--brand-light); }

/* ==========================================================================
   滚动入场动画
   ========================================================================== */
.reveal { opacity: 0; transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal[data-side="left"] { transform: translateX(-40px); }
.reveal[data-side="right"] { transform: translateX(40px); }
.reveal:not([data-side]) { transform: translateY(36px); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; }
  .hero__slide { animation: none; transition: none; }
  .map-dot__pulse { animation: none; opacity: .4; }
}

/* ==========================================================================
   返回顶部按钮
   ========================================================================== */
.to-top {
  position: fixed; right: 28px; bottom: 28px; z-index: 90;
  width: 48px; height: 48px; border-radius: 50%; border: 0; cursor: pointer;
  background: var(--brand); color: #fff; box-shadow: var(--shadow-brand);
  display: grid; place-items: center;
  opacity: 0; visibility: hidden; transform: translateY(16px);
  transition: opacity .35s var(--ease), transform .35s var(--ease), background .3s;
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--brand-deep); transform: translateY(-4px); }
.to-top svg { width: 22px; height: 22px; fill: currentColor; }

/* 暗底幽灵按钮（联系区深色背景上用） */
.btn--ghost-dark { background: transparent; color: var(--ink); border-color: var(--line); }
.btn--ghost-dark:hover { background: var(--bg); border-color: var(--brand); color: var(--brand); }
.contact__cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ==========================================================================
   子页面通用：页面 Banner + 面包屑
   ========================================================================== */
.page-hero {
  position: relative; padding: calc(var(--nav-h) + 70px) 0 70px;
  background: linear-gradient(120deg, var(--ink) 0%, var(--brand-deep) 100%);
  overflow: hidden;
}
.page-hero::before {
  content: ""; position: absolute; top: -40%; right: -10%; width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(91,208,255,.22), transparent 65%);
  pointer-events: none;
}
.page-hero__inner { position: relative; z-index: 1; max-width: 760px; }
.page-hero h1 { color: #fff; font-size: clamp(28px, 3.6vw, 44px); font-weight: 900; margin-bottom: 14px; }
.page-hero p { color: rgba(255,255,255,.8); font-size: clamp(15px, 1.6vw, 18px); }

/* 面包屑 */
.breadcrumb { padding: 18px 0; background: var(--bg); border-bottom: 1px solid var(--line); }
.breadcrumb ol { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); flex-wrap: wrap; }
.breadcrumb li { display: flex; align-items: center; gap: 8px; }
.breadcrumb li::after { content: "/"; color: var(--line); }
.breadcrumb li:last-child::after { display: none; }
.breadcrumb a { color: var(--body); transition: color .25s; }
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb li:last-child { color: var(--ink-2); font-weight: 500; }

/* 子页面正文区 */
.page-body { padding: 56px 0; }
.page-body--alt { background: var(--bg); }

/* ==========================================================================
   产品详情块（products.html）
   ========================================================================== */
.prod-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.prod-detail { display: flex; flex-direction: column; gap: 14px; padding: 32px 28px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; transition: box-shadow .35s var(--ease), transform .35s var(--ease), border-color .35s; }
.prod-detail:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: transparent; }
.prod-detail:last-child { border-bottom: 1px solid var(--line); }
.prod-detail__icon {
  width: 72px; height: 72px; border-radius: 18px; flex-shrink: 0;
  background: linear-gradient(135deg, rgba(30,152,215,.12), rgba(91,208,255,.2));
  display: grid; place-items: center;
}
.prod-detail__icon svg { width: 38px; height: 38px; fill: var(--brand); }
.prod-detail__title { font-size: 22px; margin-bottom: 10px; }
.prod-detail__desc { color: var(--body); font-size: 15px; margin-bottom: 16px; }
.prod-detail__features { display: flex; flex-wrap: wrap; gap: 10px; }
.prod-detail__features li { font-size: 13px; color: var(--brand-deep); background: var(--bg-2); padding: 6px 14px; border-radius: 999px; }
.prod-detail__cat { display: inline-block; font-size: 12px; font-weight: 700; color: var(--brand); letter-spacing: .05em; margin-bottom: 6px; }

/* 分类标签条 */
.cat-tabs { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.cat-tabs a {
  font-size: 14px; padding: 8px 20px; border-radius: 999px; border: 1px solid var(--line);
  color: var(--ink-2); transition: all .3s var(--ease);
}
.cat-tabs a:hover, .cat-tabs a.is-active { background: var(--brand); color: #fff; border-color: var(--brand); }

/* ==========================================================================
   解决方案详情（solutions.html）
   ========================================================================== */
.sol-block { padding: 70px 0; border-bottom: 1px solid var(--line); }
.sol-block:last-child { border-bottom: 0; }
.sol-block__head { max-width: 760px; margin-bottom: 40px; }
.sol-block__title { font-size: clamp(24px, 2.8vw, 34px); font-weight: 900; margin-bottom: 14px; }
.sol-block__lead { color: var(--body); font-size: 16px; }
.sol-layout { display: grid; grid-template-columns: 1fr 420px; gap: 40px; align-items: start; margin: 36px 0 8px; }
.sol-arch { display: grid; grid-template-columns: 1fr; gap: 16px; margin: 0; }
.sol-arch__item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 22px; box-shadow: var(--shadow-sm); }
.sol-arch__num { font-family: var(--ff-num); font-size: 28px; font-weight: 800; color: var(--brand); opacity: .4; }
.sol-arch__item h4 { font-size: 18px; margin: 8px 0 10px; }
.sol-arch__item p { font-size: 14px; color: var(--body); }
.sol-media { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); margin: 0; position: sticky; top: 100px; }
.sol-media img { width: 100%; display: block; }
.sol-tags { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0 0; padding: 0; list-style: none; }
.sol-tags li { font-size: 14px; color: var(--brand-deep); background: var(--bg-2); padding: 8px 18px; border-radius: 999px; font-weight: 500; }

/* ==========================================================================
   成功案例卡（cases.html）
   ========================================================================== */
.cases__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.case-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); transition: transform .4s var(--ease), box-shadow .4s var(--ease); }
.case-card:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
/* 图片区：整块可点击 */
.case-card__media { position: relative; display: block; width: 100%; padding: 0; border: 0; background: var(--bg-2); cursor: pointer; overflow: hidden; }
.case-card__media img { display: block; width: 100%; aspect-ratio: 16 / 10; object-fit: cover; transition: transform .6s var(--ease); }
.case-card__media:focus-visible { outline: 3px solid var(--brand-light); outline-offset: -3px; }
.case-card:hover .case-card__media img { transform: scale(1.06); }
/* 客户名角标（左下角） */
.case-card__badge { position: absolute; left: 12px; bottom: 12px; padding: 4px 12px; border-radius: 999px; background: rgba(10,37,64,.55); color: #fff; font-size: 13px; font-weight: 600; letter-spacing: .02em; backdrop-filter: blur(6px); }
.case-card__body { padding: 26px 24px; }
.case-card__tag { display: inline-block; font-size: 12px; color: var(--brand); background: rgba(30,152,215,.1); padding: 4px 12px; border-radius: 999px; margin-bottom: 12px; }
.case-card__title { font-size: 18px; margin-bottom: 10px; }
.case-card__title a { color: var(--ink); text-decoration: none; transition: color .3s; }
.case-card__title a:hover { color: var(--brand); }
.case-card__desc { font-size: 14px; color: var(--body); margin-bottom: 16px; }
.case-card__stats { display: flex; gap: 20px; border-top: 1px solid var(--line); padding-top: 16px; }
.case-card__stat strong { display: block; font-family: var(--ff-num); font-size: 24px; font-weight: 800; color: var(--brand); }
.case-card__stat small { font-size: 12px; color: var(--muted); }

/* ==========================================================================
   案例大图查看（Lightbox）
   ========================================================================== */
.lightbox { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; padding: 32px; background: rgba(10,37,64,.92); opacity: 0; visibility: hidden; transition: opacity .4s var(--ease), visibility .4s var(--ease); }
.lightbox.is-visible { opacity: 1; visibility: visible; }
.lightbox__inner { position: relative; width: 80vw; max-width: 100%; max-height: 80vh; transform: translateY(24px) scale(.96); transition: transform .45s var(--ease); }
.lightbox.is-visible .lightbox__inner { transform: none; }
.lightbox__img { display: block; width: 100%; height: auto; max-height: 80vh; object-fit: contain; border-radius: var(--radius); box-shadow: var(--shadow); }
.lightbox__close { position: absolute; top: 14px; right: 14px; z-index: 2; width: 40px; height: 40px; display: grid; place-items: center; border: 0; border-radius: 50%; background: rgba(10,37,64,.55); color: #fff; cursor: pointer; transition: background .3s, transform .3s var(--ease); }
.lightbox__close svg { width: 20px; height: 20px; }
.lightbox__close:hover { background: var(--brand-deep); transform: rotate(90deg); }

/* ==========================================================================
   关于：公司简介 / 时间轴 / 合作
   ========================================================================== */
.about-intro { display: grid; grid-template-columns: 1.3fr 1fr; gap: 56px; align-items: center; }
.about-intro__text p { color: var(--body); font-size: 16px; margin-bottom: 4px; }
.about-intro__stats { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.about-stat { background: var(--bg); border-radius: var(--radius); padding: 30px 24px; text-align: center; }
.about-stat strong { display: block; font-family: var(--ff-num); font-size: 40px; font-weight: 800; color: var(--brand); line-height: 1; }
.about-stat span { font-size: 14px; color: var(--muted); display: block; margin-top: 8px; }

/* 时间轴 */
.timeline { position: relative; max-width: 800px; margin: 0 auto; padding-left: 32px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.timeline__item { position: relative; padding-bottom: 40px; }
.timeline__item:last-child { padding-bottom: 0; }
.timeline__item::before { content: ""; position: absolute; left: -32px; top: 4px; width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 3px solid var(--brand); box-shadow: 0 0 0 5px rgba(30,152,215,.12); }
.timeline__year { font-family: var(--ff-num); font-size: 20px; font-weight: 800; color: var(--brand); margin-bottom: 6px; }
.timeline__title { font-size: 17px; margin-bottom: 6px; }
.timeline__desc { font-size: 14px; color: var(--body); }

/* 合作渠道网格 */
.partner-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.partner-card { text-align: center; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 36px 24px; transition: transform .35s var(--ease), box-shadow .35s var(--ease); }
.partner-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.partner-card__icon { width: 56px; height: 56px; margin: 0 auto 16px; border-radius: 14px; background: linear-gradient(135deg, var(--brand), var(--brand-deep)); display: grid; place-items: center; }
.partner-card__icon svg { width: 28px; height: 28px; fill: #fff; }
.partner-card h4 { font-size: 17px; margin-bottom: 8px; }
.partner-card p { font-size: 14px; color: var(--body); }

/* ==========================================================================
   联系表单 + 信息（contact.html）
   ========================================================================== */
.contact-layout { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: start; }
.form { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow-sm); }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form__group { margin-bottom: 18px; }
.form__group label { display: block; font-size: 14px; font-weight: 500; color: var(--ink-2); margin-bottom: 8px; }
.form__group .req { color: #ef4444; margin-left: 2px; }
.form__group input, .form__group select, .form__group textarea {
  width: 100%; padding: 12px 16px; font-size: 14px; font-family: var(--ff);
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg);
  transition: border-color .25s, background .25s;
}
.form__group input:focus, .form__group select:focus, .form__group textarea:focus {
  outline: none; border-color: var(--brand); background: #fff;
}
.form__group textarea { resize: vertical; min-height: 110px; }
.form__note { font-size: 12px; color: var(--muted); margin-top: 12px; }
.form__success { display: none; padding: 14px 18px; border-radius: var(--radius-sm); background: rgba(34,197,94,.1); color: #16a34a; font-size: 14px; margin-bottom: 18px; border: 1px solid rgba(34,197,94,.3); }
.form__success.is-visible { display: block; }

/* 表单提交按钮（区别于通用胶囊 .btn） */
.form__submit {
  width: 100%; padding: 14px; font-size: 16px; font-weight: 600; letter-spacing: .02em;
  color: #fff; background: var(--brand); border: 0; border-radius: var(--radius-sm);
  cursor: pointer; transition: background .25s, transform .15s;
}
.form__submit:hover { background: var(--brand-deep); }
.form__submit:active { transform: scale(.985); }
.form__submit:disabled { opacity: .6; cursor: not-allowed; }

/* 字段校验错误 */
.form__group.has-error input,
.form__group.has-error select,
.form__group.has-error textarea { border-color: #ef4444; background: #fef2f2; }
.form__error { display: none; font-size: 12px; color: #ef4444; margin-top: 6px; }
.form__group.has-error .form__error { display: block; }

.contact-info { display: flex; flex-direction: column; gap: 16px; }
.contact-info__item { display: flex; gap: 16px; padding: 24px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.contact-info__icon { width: 48px; height: 48px; border-radius: 12px; background: linear-gradient(135deg, rgba(30,152,215,.12), rgba(91,208,255,.2)); display: grid; place-items: center; flex-shrink: 0; }
.contact-info__icon svg { width: 24px; height: 24px; fill: var(--brand); }
.contact-info__item h4 { font-size: 15px; margin-bottom: 4px; }
.contact-info__item p { font-size: 14px; color: var(--body); }
.contact-info__item strong { font-family: var(--ff-num); font-size: 20px; color: var(--ink); font-weight: 700; }

/* CTA 横幅（通用，子页底部） */
.cta-banner { background: linear-gradient(120deg, var(--ink) 0%, var(--brand-deep) 100%); border-radius: var(--radius); padding: 48px; text-align: center; color: #fff; margin-top: 40px; }
.cta-banner h3 { color: #fff; font-size: clamp(22px, 2.4vw, 30px); margin-bottom: 10px; }
.cta-banner p { color: rgba(255,255,255,.8); margin-bottom: 24px; }

/* contact 页：三大服务承诺三栏 */
.cta-banner__list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 24px; text-align: left; }
.cta-banner__item { display: flex; align-items: flex-start; gap: 14px; }
.cta-banner__check { flex-shrink: 0; width: 32px; height: 32px; border-radius: 50%; background: rgba(255,255,255,.15); display: grid; place-items: center; font-size: 16px; color: var(--brand-light); }
.cta-banner__item strong { display: block; font-size: 16px; color: #fff; margin-bottom: 4px; }
.cta-banner__item p { font-size: 13px; color: rgba(255,255,255,.7); margin-bottom: 0; }
@media (max-width: 768px) { .cta-banner__list { grid-template-columns: 1fr; gap: 18px; } }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1024px) {
  .products__grid, .contact__grid { grid-template-columns: 1fr; max-width: 520px; margin-left: auto; margin-right: auto; }
  .clients__grid { grid-template-columns: repeat(2, 1fr); }
  .values__cards { height: auto; display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; padding: 0 8px; }
  .value-card { position: static; width: 100%; }
  .solution__inner, .solution__inner--reverse { grid-template-columns: 1fr; gap: 36px; }
  .solution__inner--reverse .solution__media { order: 0; }
  .footer__inner { grid-template-columns: 1fr; gap: 28px; }
  .footer__contact { text-align: left; }
  /* 子页面响应式 */
  .prod-list { grid-template-columns: 1fr; }
  .prod-detail { gap: 14px; }
  .sol-arch { grid-template-columns: 1fr; }
  .cases__grid { grid-template-columns: repeat(2, 1fr); }
  .about-intro { grid-template-columns: 1fr; gap: 36px; }
  .partner-grid { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; gap: 36px; }
  .sol-layout { grid-template-columns: 1fr; gap: 28px; }
  .sol-media { position: static; }
}

@media (max-width: 768px) {
  .section { padding: 52px 0; }
  .values__cards { grid-template-columns: 1fr; }
  .value-card { position: static; width: 100%; }
  .nav__menu, .nav__phone { display: none; }
  .nav__toggle { display: flex; }
  .nav.nav-open { background: rgba(255,255,255,.96); backdrop-filter: blur(16px); }
  .nav.nav-open .nav__logo { filter: none; }
  /* 移动端展开菜单 */
  .nav__menu.mobile-open {
    display: flex; flex-direction: column; position: fixed;
    top: var(--nav-h); left: 0; right: 0; bottom: 0;
    background: #fff; padding: 24px; gap: 4px; overflow-y: auto;
  }
  .nav__menu.mobile-open .nav__link { color: var(--ink); padding: 14px 8px; border-bottom: 1px solid var(--line); }
  .nav__menu.mobile-open .nav__link::after { display: none; }
  .nav__menu.mobile-open .nav__item--has-panel > .nav__link::before { display: none; }
  .nav__menu.mobile-open .megapanel {
    position: static; transform: none; opacity: 1; visibility: visible; pointer-events: auto;
    box-shadow: none; border: 0; padding: 8px 0 8px 16px; min-width: 0;
  }
  .nav__menu.mobile-open .megapanel__grid { grid-template-columns: 1fr; gap: 0; }
  .nav__menu.mobile-open .nav__phone {
    display: inline-flex; margin-top: 16px; color: var(--brand); border-color: var(--line); background: var(--bg);
  }
  .hero { min-height: 88vh; }
  .hero__arrow { display: none; }
  .hero__dots { bottom: 56px; }
  .clients__grid { grid-template-columns: repeat(2, 1fr); }
  .products__cta { flex-direction: column; text-align: center; align-items: center; padding: 32px; }
  .footer__bottom { flex-direction: column; text-align: center; }
  /* 子页面移动端 */
  .cases__grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .form__row { grid-template-columns: 1fr; }
  .about-intro__stats { grid-template-columns: 1fr; }
  .contact__cta { flex-direction: column; align-items: center; }
  .cta-banner { padding: 32px 24px; }
  .contact-info { max-width: 480px; margin-left: auto; margin-right: auto; }
  /* Lightbox 移动端：占满屏幕，图更大 */
  .lightbox { padding: 0; }
  .lightbox__inner { width: 80vw; max-height: 80vh; }
  .lightbox__img { max-height: 80vh; border-radius: 0; }
}