/* ==========================================================================
   迅达利 SINDALY 工业省电空调官网 · 响应式样式表
   目录：1 变量与基础  2 按钮与通用组件  3 顶部导航  4 首屏 Banner
        5 品牌实力  6 节能特性与省电对比  7 技术参数  8 应用案例
        9 联系我们与表单  10 页脚与悬浮按钮  11 响应式断点
   ========================================================================== */

/* ---------------------------------------------------------------- 1. 变量与基础 */
:root {
  --brand-500: #2a86e0;
  --brand-600: #1668c4;
  --brand-700: #0f4f9c;
  --brand-100: #cfe4fa;
  --brand-050: #eef5fd;

  --eco: #16a34a;
  --eco-soft: #e9f8ef;
  --danger: #d92d20;

  --ink-900: #0e1c2c;
  --ink-700: #33475b;
  --ink-500: #69788a;

  --line: #e3eaf2;
  --bg: #ffffff;
  --bg-soft: #f5f8fc;

  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(16, 40, 70, .06);
  --shadow-md: 0 12px 30px -18px rgba(16, 40, 70, .28);
  --shadow-lg: 0 24px 50px -22px rgba(16, 40, 70, .35);

  --header-h: 76px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-700);
  background: var(--bg);
  overflow-x: hidden;
}

body.nav-open { overflow: hidden; }

img { max-width: 100%; }
svg { display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
ul { margin: 0; padding: 0; }

h1, h2, h3, h4 { color: var(--ink-900); line-height: 1.28; font-weight: 800; }

:focus-visible {
  outline: 2px solid var(--brand-600);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: fixed; top: -60px; left: 16px; z-index: 200;
  padding: 10px 18px; border-radius: 0 0 10px 10px;
  background: var(--brand-700); color: #fff; font-size: 14px;
  transition: top .2s;
}
.skip-link:focus { top: 0; }

.section { padding: clamp(56px, 8vw, 104px) 0; }
.section--soft { background: var(--bg-soft); }
.section--dark { background: #0a1929; color: #fff; }
.section--dark .section-lead { color: #a9c3d8; }
.section--dark .section-title { color: #fff; }
#partner-map .eyebrow { display: flex; justify-content: center; }
#partner-map .section-title { text-align: center; }
.map-stats { display: flex; flex-wrap: wrap; justify-content: center; gap: clamp(20px, 5vw, 64px); margin: 0 0 30px; text-align: center; }
.map-stat b { display: block; font-size: clamp(24px, 3.4vw, 36px); font-weight: 800; color: #e8c547; text-shadow: 0 0 15px rgba(232,197,71,.4); }
.map-stat span { display: block; margin-top: 4px; font-size: clamp(11px, 1.2vw, 13px); letter-spacing: 2px; color: #a9c3d8; }
.map-frame { max-width: 1000px; margin: 8px auto 0; border-radius: 16px; overflow: hidden; box-shadow: 0 24px 60px rgba(0,0,0,.45); background: #0a1929; }
.map-frame iframe { display: block; width: 100%; height: 620px; border: 0; }

.section-head { max-width: 760px; margin-bottom: clamp(28px, 4vw, 48px); }
.section-head--center { margin-left: auto; margin-right: auto; text-align: center; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  margin: 0 0 12px;
  font-size: 13px; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; color: var(--brand-600);
}
.eyebrow::before {
  content: ""; width: 22px; height: 2px; border-radius: 2px;
  background: currentColor;
}
.section-head--center .eyebrow::after {
  content: ""; width: 22px; height: 2px; border-radius: 2px;
  background: currentColor;
}

.section-title {
  margin: 0 0 16px;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  letter-spacing: -.01em;
}

.section-lead {
  margin: 0;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.78;
  color: var(--ink-500);
}

/* -------------------------------------------------------- 2. 按钮与通用组件 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 15px; font-weight: 600; line-height: 1.2;
  white-space: nowrap; cursor: pointer;
  transition: transform .22s ease, box-shadow .22s ease, background-color .22s ease,
              border-color .22s ease, color .22s ease, opacity .22s ease;
}
.btn--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
  box-shadow: 0 12px 26px -14px rgba(22, 104, 196, .75);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 18px 32px -14px rgba(22, 104, 196, .8); }
.btn--primary:disabled { opacity: .65; cursor: not-allowed; transform: none; }

.btn--ghost {
  color: #fff;
  background: rgba(255, 255, 255, .07);
  border-color: rgba(255, 255, 255, .42);
}
.btn--ghost:hover { background: rgba(255, 255, 255, .18); border-color: rgba(255, 255, 255, .7); }

.btn--sm { padding: 10px 18px; font-size: 14px; }
.btn--lg { padding: 15px 30px; font-size: 16px; }
.btn--block { width: 100%; }

/* 入场动效 */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .65s ease, transform .65s cubic-bezier(.22, .7, .3, 1);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ------------------------------------------------------------- 3. 顶部导航 */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(180%) blur(10px);
  transition: box-shadow .25s ease;
}
.site-header.is-solid { box-shadow: 0 10px 30px -18px rgba(16, 40, 70, .35); }

.header-inner {
  display: flex; align-items: center; gap: 20px;
  height: var(--header-h);
}

.brand { display: flex; align-items: center; gap: 12px; margin-right: auto; flex: 0 0 auto; }
.brand-logo { height: 44px; width: auto; }
.brand-text { display: block; line-height: 1.25; }
.brand-text b { display: block; font-size: 17px; letter-spacing: .06em; color: var(--ink-900); }
.brand-text i {
  display: block; font-style: normal;
  font-size: 11.5px; color: var(--ink-500); letter-spacing: .04em;
}

.nav { display: flex; align-items: center; gap: 14px; }
.nav-list { display: flex; align-items: center; gap: 2px; list-style: none; }
.nav-link {
  position: relative;
  display: block; padding: 9px 14px; border-radius: 8px;
  font-size: 15px; font-weight: 500; color: var(--ink-700);
  transition: color .2s, background-color .2s;
}
.nav-link:hover { color: var(--brand-600); background: var(--brand-050); }
.nav-link.is-active { color: var(--brand-600); font-weight: 600; }
.nav-link.is-active::after {
  content: ""; position: absolute; left: 50%; bottom: 2px;
  width: 18px; height: 2px; border-radius: 2px;
  background: var(--brand-600); transform: translateX(-50%);
}

.header-actions { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; }

.lang-switch {
  display: inline-flex; align-items: center;
  padding: 3px; border-radius: 999px;
  background: var(--brand-050); border: 1px solid var(--brand-100);
}
.lang-btn {
  padding: 6px 14px; border: 0; border-radius: 999px;
  background: transparent; color: var(--ink-500);
  font-size: 13px; font-weight: 600; cursor: pointer;
  transition: background-color .2s, color .2s, box-shadow .2s;
}
.lang-btn:hover { color: var(--brand-600); }
.lang-btn.is-active {
  background: #fff; color: var(--brand-700);
  box-shadow: 0 2px 8px -3px rgba(16, 40, 70, .35);
}

.nav-toggle {
  display: none;
  width: 42px; height: 42px; padding: 11px 10px;
  border: 1px solid var(--line); border-radius: 10px;
  background: #fff; cursor: pointer;
}
.nav-toggle span {
  display: block; height: 2px; border-radius: 2px;
  background: var(--ink-900); transition: transform .25s, opacity .2s;
}
.nav-toggle span + span { margin-top: 5px; }
.nav-toggle.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-active span:nth-child(2) { opacity: 0; }
.nav-toggle.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------------------------------------------------------- 4. 首屏 Banner */
.hero {
  position: relative;
  overflow: hidden;
  background: #08243f;
  color: #fff;
}
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(100deg, rgba(6, 24, 44, .92) 0%, rgba(7, 30, 56, .78) 42%, rgba(8, 34, 62, .38) 100%),
    radial-gradient(120% 90% at 85% 15%, rgba(42, 134, 224, .28), transparent 60%);
}

.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: clamp(24px, 4vw, 56px); align-items: center;
  padding-top: clamp(48px, 7vw, 96px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.badge {
  display: inline-flex; align-items: center; gap: 10px;
  margin: 0 0 22px; padding: 8px 16px;
  border: 1px solid rgba(255, 255, 255, .22); border-radius: 999px;
  background: rgba(255, 255, 255, .1);
  font-size: 13px; color: rgba(255, 255, 255, .94);
  backdrop-filter: blur(4px);
}
.badge-dot {
  width: 8px; height: 8px; border-radius: 50%; background: #4ade80;
  box-shadow: 0 0 0 4px rgba(74, 222, 128, .22);
}

.hero-title {
  margin: 0 0 20px;
  font-size: clamp(1.8rem, 3.6vw, 2.7rem);
  line-height: 1.18;
  letter-spacing: -.01em;
  color: #fff;
}
.hero-title span {
  display: block;
  font-size: .75em; line-height: 1.35;
}
.hero-title em {
  display: block; font-style: normal;
  font-size: .75em; line-height: 1.35; white-space: nowrap;
  background: linear-gradient(92deg, #8fd8ff 0%, #9fe0ff 40%, #7ef0b0 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: #9fe0ff;
}
/* 英文行较长，允许换行避免溢出 */
.lang-en .hero-title em { white-space: normal; }

.hero-sub {
  margin: 0 0 32px;
  max-width: 560px;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.8;
  color: rgba(255, 255, 255, .8);
}

.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; }

.hero-stats {
  display: flex; flex-wrap: wrap; gap: clamp(24px, 4vw, 52px);
  margin-top: clamp(32px, 4vw, 46px);
  padding-top: 26px;
  border-top: 1px solid rgba(255, 255, 255, .16);
}
.stat-value {
  display: block;
  font-size: clamp(1.5rem, 2.6vw, 2.05rem);
  font-weight: 800; color: #fff; letter-spacing: -.01em;
}
.stat-label { display: block; margin-top: 4px; font-size: 13px; color: rgba(255, 255, 255, .68); }

.hero-visual { display: flex; flex-direction: column; align-items: stretch; }
.hero-card {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: 18px; overflow: hidden;
  background: #fff;
  box-shadow: 0 34px 70px -26px rgba(0, 0, 0, .6);
}
.hero-card img { display: block; width: 100%; height: auto; }
.hero-card .hero-float { z-index: 2; }
.hero-float {
  position: absolute; top: 16px; right: 16px;
  padding: 8px 14px; border-radius: 999px;
  background: linear-gradient(135deg, #22b45c, #0f8f45);
  color: #fff; font-size: 13.5px; font-weight: 700;
  box-shadow: 0 12px 24px -12px rgba(15, 143, 69, .9);
}
.hero-card-caption { margin-top: 16px; display: flex; flex-direction: column; gap: 4px; }
.hero-card-caption b { font-size: 15px; color: #fff; }
.hero-card-caption span { font-size: 13px; color: rgba(255, 255, 255, .7); }

/* ------------------------------------------------------------- 5. 品牌实力 */
.about-grid {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: clamp(28px, 4vw, 60px); align-items: start;
}
.about-p { margin: 16px 0 0; font-size: 15.5px; line-height: 1.85; color: var(--ink-500); }

.points {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px; margin: 34px 0 0; list-style: none;
}
.point {
  display: flex; gap: 14px;
  padding: 20px 18px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff;
  transition: transform .25s, box-shadow .25s, border-color .25s, opacity .5s ease;
}
.point:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--brand-100); }
.point-num { flex: 0 0 auto; font-size: 14px; font-weight: 800; color: var(--brand-500); letter-spacing: .04em; }
.point b { display: block; margin-bottom: 6px; font-size: 15.5px; color: var(--ink-900); }
.point p { margin: 0; font-size: 13.5px; line-height: 1.72; color: var(--ink-500); }

.about-figure {
  position: sticky; top: calc(var(--header-h) + 28px);
  margin: 0; overflow: hidden;
  border: 1px solid var(--line); border-radius: 18px;
  background: #fff; box-shadow: var(--shadow-md);
}
.about-slides { position: relative; aspect-ratio: 4 / 3; overflow: hidden; }
.about-figure .hero-dots--card { z-index: 2; }
.about-figure img { display: block; width: 100%; height: auto; }
.about-figure figcaption {
  padding: 12px 18px; font-size: 12.5px; color: var(--ink-500);
  border-top: 1px solid var(--line); background: #fafcff;
}

/* 轮播图右上角文字角标 */
.slide-tag {
  position: absolute; top: 14px; right: 14px; z-index: 2;
  padding: 6px 14px; border-radius: 999px;
  background: var(--brand-600); color: #fff;
  font-size: 12.5px; font-weight: 700; letter-spacing: .02em;
  box-shadow: 0 4px 12px rgba(12, 42, 76, .28);
}

/* 自主研发 */
.rd-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 18px 26px; margin: 0 0 24px; }
.rd-badge {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-width: 108px; padding: 12px 22px; border-radius: 16px;
  background: linear-gradient(135deg, var(--brand-700), var(--brand-500)); color: #fff;
  box-shadow: var(--shadow-md);
}
.rd-badge b { font-size: 26px; line-height: 1.15; }
.rd-badge span { font-size: 12.5px; opacity: .92; }
.rd-flow { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; margin: 0; padding: 0; }
.rd-flow li { position: relative; padding: 8px 22px; background: linear-gradient(135deg, var(--brand-700), var(--brand-500)); border: none; border-radius: 999px; font-size: 13.5px; font-weight: 600; color: #fff; box-shadow: var(--shadow-sm); }
.rd-flow li + li { margin-left: 26px; }
.rd-flow li + li::before {
  content: '→'; position: absolute; left: -23px; top: 50%; transform: translateY(-50%);
  color: rgba(255, 255, 255, .85); font-weight: 800;
}
/* 证书墙（双行反向滚动，小尺寸防细节泄露） */
.cert-wall { overflow: hidden; margin: 0 0 10px; }
.cert-row { position: relative; overflow: hidden; padding: 7px 0; }
.cert-row::before, .cert-row::after {
  content: ''; position: absolute; top: 0; bottom: 0; width: 72px; z-index: 2; pointer-events: none;
}
.cert-row::before { left: 0; background: linear-gradient(90deg, #fff, rgba(255, 255, 255, 0)); }
.cert-row::after { right: 0; background: linear-gradient(270deg, #fff, rgba(255, 255, 255, 0)); }
.cert-track {
  display: flex; width: max-content;
  animation: certScroll 64s linear infinite;
  will-change: transform;
}
.cert-track--reverse { animation-duration: 78s; animation-direction: reverse; }
.cert-row:hover .cert-track { animation-play-state: paused; }
@keyframes certScroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.cert-item {
  flex: none; width: 148px; margin-right: 14px;
  border: 1px solid var(--line); border-radius: 10px; overflow: hidden;
  background: #fff; box-shadow: var(--shadow-sm);
}
.cert-item img {
  display: block; width: 100%; height: auto;
  pointer-events: none; user-select: none; -webkit-user-drag: none;
}
.cert-item--wide { width: 280px; }
.patent-note { margin: 0 0 28px; text-align: center; font-size: 12.5px; color: var(--ink-500); }

/* ------------------------------------------------ 6. 节能特性与省电对比 */
.feature-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(284px, 1fr));
  gap: 22px;
}
.feature-card {
  position: relative; overflow: hidden;
  padding: 28px 24px;
  border: 1px solid var(--line); border-radius: 16px;
  background: #fff;
  transition: transform .25s, box-shadow .25s, border-color .25s, opacity .5s ease;
}
.feature-card::before {
  content: ""; position: absolute; top: 0; left: 24px; right: 24px; height: 3px;
  border-radius: 0 0 3px 3px;
  background: linear-gradient(90deg, var(--brand-500), var(--eco));
  opacity: 0; transition: opacity .25s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--brand-100); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  display: grid; place-items: center;
  width: 48px; height: 48px; margin-bottom: 18px;
  border-radius: 12px;
  background: var(--brand-050); color: var(--brand-600);
}
.feature-icon svg { width: 24px; height: 24px; }
.feature-card h3 { margin: 0 0 10px; font-size: 16.5px; }
.feature-card p { margin: 0; font-size: 14px; line-height: 1.78; color: var(--ink-500); }

.compare {
  margin-top: clamp(40px, 5vw, 72px);
  padding: clamp(24px, 3.4vw, 44px);
  border: 1px solid var(--line); border-radius: 20px;
  background: #fff; box-shadow: var(--shadow-md);
}
.compare-head { max-width: 660px; margin-bottom: 30px; }
.compare-title { margin: 0 0 10px; font-size: clamp(1.25rem, 2.2vw, 1.75rem); }
.compare-lead { margin: 0; font-size: 15px; line-height: 1.75; color: var(--ink-500); }

.compare-bars { display: grid; gap: 22px; }
.bar-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 12px;
  margin-bottom: 9px; font-size: 14.5px; color: var(--ink-700);
}
.bar-head b { font-size: 18px; font-weight: 800; color: var(--ink-900); }
.bar-head b.is-eco { color: var(--eco); }
.bar-track { height: 12px; border-radius: 999px; background: #eef2f7; overflow: hidden; }
.bar-fill { display: block; height: 100%; border-radius: 999px; }
.bar-fill--legacy { background: linear-gradient(90deg, #bcc9d8, #8ea3b8); }
.bar-fill--ours { background: linear-gradient(90deg, var(--brand-500), var(--eco)); }
.bar-note {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  margin: 9px 0 0; font-size: 13.5px; color: var(--ink-500);
}
.bar-tag {
  padding: 3px 11px; border-radius: 999px;
  background: var(--eco-soft); color: #0f7c46;
  font-size: 12.5px; font-style: normal; font-weight: 700;
}

.compare-cards {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px; margin-top: 32px;
}
.mini-card {
  padding: 22px 20px;
  border: 1px solid #e8eef6; border-radius: 14px;
  background: #f6f9fd;
}
.mini-card b {
  display: block;
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  font-weight: 800; line-height: 1.15; color: var(--brand-600);
}
.mini-card b.is-eco { color: var(--eco); }
.mini-card span { display: block; margin-top: 6px; font-size: 13.5px; font-weight: 700; color: var(--ink-700); }
.mini-card p { margin: 6px 0 0; font-size: 12.5px; line-height: 1.65; color: var(--ink-500); }

.compare-note {
  margin: 24px 0 0; padding-top: 18px;
  border-top: 1px dashed var(--line);
  font-size: 12.5px; line-height: 1.75; color: var(--ink-500);
}

/* ------------------------------------------------------------- 7. 技术参数 */
.table-hint {
  display: none; align-items: center; gap: 8px;
  margin: 0 0 12px; font-size: 13px; color: var(--brand-600);
}
.table-hint svg { width: 18px; height: 18px; }

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line); border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow-sm);
  -webkit-overflow-scrolling: touch;
  transition: box-shadow .25s, opacity .5s ease, transform .5s ease;
}
.table-scroll:not(.is-end) {
  box-shadow: inset -22px 0 22px -22px rgba(16, 40, 70, .35), var(--shadow-sm);
}

.specs-table { width: 100%; min-width: 780px; border-collapse: collapse; font-size: 14px; }
.specs-table th,
.specs-table td {
  padding: 14px 18px; text-align: left;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.specs-table thead th {
  background: #f1f7fd; color: var(--brand-700);
  font-size: 14px; font-weight: 700;
}
.specs-table tbody th {
  background: #fbfdff; color: var(--ink-700); font-weight: 600;
}
.specs-table tbody tr:hover th,
.specs-table tbody tr:hover td { background: #f4f9fe; }
.specs-table .spec-img { display: block; width: 118px; height: 150px; object-fit: contain; margin: 0 auto; background: #fff; border-radius: 8px; }
.specs-table tbody tr:last-child th,
.specs-table tbody tr:last-child td { border-bottom: 0; }
.specs-table th:first-child {
  position: sticky; left: 0; z-index: 2;
  box-shadow: 1px 0 0 var(--line);
}

/* 型号参数卡片 */
.model-grid {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px;
  margin: 34px 0 26px;
}
.model-card {
  display: flex; flex-direction: column;
  background: linear-gradient(180deg, #ffffff 0%, #eaf4fe 100%);
  border: 1px solid #d7e7f8; border-radius: 18px; overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease;
}
.model-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.model-card__media { background: linear-gradient(160deg, #dcecfd, #c6e1fa); }
.model-card__media img { display: block; width: 100%; aspect-ratio: 1 / 1; object-fit: cover; }
.model-card__body { display: flex; flex-direction: column; flex: 1; padding: 16px 16px 14px; }
.model-card__head { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; margin-bottom: 10px; }
.model-card__head h3 { margin: 0; font-size: 17.5px; letter-spacing: .3px; color: var(--brand-700); }
.model-card__tag {
  display: inline-block; padding: 4px 12px; border-radius: 999px;
  background: linear-gradient(135deg, var(--brand-700), var(--brand-500));
  color: #fff; font-size: 12px; font-weight: 600; letter-spacing: .5px;
}
.model-card__specs { list-style: none; margin: 0; padding: 0; }
.model-card__specs li {
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  padding: 9px 0; border-top: 1px dashed #c9dff4; font-size: 13px;
}
.model-card__specs li:first-child { border-top: 0; }
.model-card__specs span { color: var(--ink-500); }
.model-card__specs b { color: var(--ink-900); font-size: 14.5px; white-space: nowrap; }

.specs-note { margin: 14px 0 0; font-size: 12.5px; line-height: 1.75; color: var(--ink-500); }

.cta-band {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
  margin-top: clamp(28px, 3.6vw, 44px);
  padding: clamp(22px, 3vw, 34px);
  border-radius: 18px;
  background: linear-gradient(118deg, #0c2a4c 0%, #12507f 58%, #0e6b6b 100%);
  color: #fff;
}
.cta-band-text b { display: block; margin-bottom: 8px; font-size: clamp(1.05rem, 1.8vw, 1.35rem); }
.cta-band-text p { margin: 0; max-width: 620px; font-size: 14.5px; line-height: 1.75; color: rgba(255, 255, 255, .78); }
.cta-band .btn { flex: 0 0 auto; background: #fff; color: var(--brand-700); box-shadow: none; }
.cta-band .btn:hover { background: #eaf4ff; }

/* ------------------------------------------------------------- 8. 应用案例 */
.case-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.case-card {
  display: flex; flex-direction: column; overflow: hidden;
  border: 1px solid var(--line); border-radius: 18px;
  background: #fff;
  transition: transform .25s, box-shadow .25s, border-color .25s, opacity .5s ease;
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--brand-100); }
.case-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: #eef3f9; }
.case-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .55s ease; }
.case-card:hover .case-media img { transform: scale(1.06); }
.case-tag {
  position: absolute; top: 14px; left: 14px;
  padding: 5px 12px; border-radius: 999px;
  background: rgba(10, 36, 64, .82); color: #fff;
  font-size: 12.5px; font-weight: 600;
  backdrop-filter: blur(4px);
}
.case-body { display: flex; flex-direction: column; gap: 10px; flex: 1; padding: 20px; }
.case-body h3 { margin: 0; font-size: 16.5px; }
.case-body p { margin: 0; font-size: 14px; line-height: 1.78; color: var(--ink-500); }
.case-body .case-metric {
  margin-top: auto; padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13.5px; font-weight: 700; color: var(--eco);
}
.cases-more {
  margin: clamp(28px, 3.6vw, 44px) 0 0;
  text-align: center; font-size: 14.5px; color: var(--ink-500);
}

/* ------------------------------------------------------ 9. 联系我们与表单 */
.contact-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 60px); align-items: start;
}

.info-list { display: grid; gap: 16px; margin: clamp(24px, 3vw, 36px) 0 0; list-style: none; }
.info-item {
  display: flex; gap: 16px;
  padding: 18px 20px;
  border: 1px solid var(--line); border-radius: 14px;
  background: #fff;
}
.info-icon {
  display: grid; place-items: center; flex: 0 0 auto;
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--brand-050); color: var(--brand-600);
}
.info-icon svg { width: 22px; height: 22px; }
.info-label { display: block; margin-bottom: 4px; font-size: 12.5px; color: var(--ink-500); }
.info-value { display: block; font-size: 15.5px; line-height: 1.6; color: var(--ink-900); word-break: break-word; }
a.info-value:hover { color: var(--brand-600); }
.info-value.is-strong { font-size: 22px; font-weight: 800; color: var(--brand-600); letter-spacing: .02em; }
.info-tip { display: block; margin-top: 4px; font-size: 12px; color: var(--ink-500); }

.contact-form-wrap { position: sticky; top: calc(var(--header-h) + 28px); }
.contact-form {
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line); border-radius: 20px;
  background: #fff; box-shadow: var(--shadow-md);
}
.contact-form h3 { margin: 0 0 8px; font-size: 1.25rem; }
.form-desc { margin: 0 0 22px; font-size: 13px; color: var(--ink-500); }

.field { margin-bottom: 16px; }
.field label {
  display: block; margin-bottom: 8px;
  font-size: 13.5px; font-weight: 600; color: var(--ink-700);
}
.field label i { font-style: normal; color: var(--danger); }
.field input,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line); border-radius: 10px;
  background: #fbfdff;
  font: inherit; font-size: 14.5px; color: var(--ink-900);
  transition: border-color .2s, box-shadow .2s, background-color .2s;
}
.field textarea { resize: vertical; min-height: 108px; }
.field input::placeholder,
.field textarea::placeholder { color: #9aa8b8; }
.field input:focus,
.field textarea:focus {
  outline: none; background: #fff;
  border-color: var(--brand-500);
  box-shadow: 0 0 0 3px rgba(42, 134, 224, .14);
}
.field.has-error input,
.field.has-error textarea { border-color: var(--danger); background: #fff7f7; }
.field-error { display: none; margin-top: 6px; font-size: 12.5px; color: var(--danger); }
.field.has-error .field-error { display: block; }

.form-privacy { margin: 12px 0 0; font-size: 12px; line-height: 1.7; color: var(--ink-500); }
.form-message {
  margin: 14px 0 0; padding: 12px 14px;
  border-radius: 10px; font-size: 13.5px; line-height: 1.7;
}
.form-message--success { border: 1px solid #b7e6cd; background: var(--eco-soft); color: #0f7c46; }
.form-message--fail { border: 1px solid #f4c7c3; background: #fff4f4; color: #b42318; }

/* --------------------------------------------------- 10. 页脚与悬浮按钮 */
.site-footer { background: #0b213a; color: rgba(255, 255, 255, .72); }
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.1fr auto;
  gap: 32px; padding-top: clamp(44px, 6vw, 72px); padding-bottom: 44px;
}
.footer-qrs { display: flex; gap: 18px; }
.footer-qr { margin: 0; text-align: center; }
.footer-qr img {
  display: block; width: 92px; height: 92px;
  border-radius: 10px; background: #fff; padding: 5px;
}
.footer-qr figcaption { margin-top: 8px; font-size: 12.5px; color: rgba(255,255,255,.72); }

/* 服务客户 Logo 墙 */
.client-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(132px, 1fr));
  gap: 14px; margin-top: 36px;
}
.client-card {
  background: #fff; border: 1px solid rgba(15, 46, 87, .08);
  border-radius: 12px; overflow: hidden;
  box-shadow: 0 6px 18px -12px rgba(15, 46, 87, .25);
  transition: transform .25s ease, box-shadow .25s ease;
}
.client-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 28px -14px rgba(15, 46, 87, .35);
}
.client-card img { display: block; width: 100%; height: auto; }

/* 招商政策页 */
.join-hero {
  margin: 0 0 44px;
  background: linear-gradient(135deg, var(--brand-700), var(--brand-500));
  border-radius: 16px; padding: clamp(28px, 4vw, 44px) clamp(20px, 4vw, 34px);
  text-align: center; color: #fff; box-shadow: var(--shadow-md);
}
.join-hero__title { margin: 0; color: #fff; font-size: clamp(24px, 3.4vw, 34px); letter-spacing: .02em; }
.join-hero__title small { display: block; margin-top: 8px; font-size: clamp(16px, 2vw, 20px); font-weight: 600; color: #ffe9a8; }
.join-hero__tags { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin: 24px 0 0; padding: 0; }
.join-hero__tags li { background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.4); border-radius: 999px; padding: 8px 18px; font-size: 14.5px; font-weight: 600; }
.join-policy { margin: 0 0 44px; }
.policy-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; align-items: start; }
.join-policy__banner { margin: 0 0 6px; text-align: center; font-size: clamp(20px, 2.6vw, 26px); color: var(--brand-700); }
.join-policy .join-sub { margin: 0; text-align: center; font-size: 16px; color: var(--brand-600); }
.policy-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; margin-top: 20px; box-shadow: var(--shadow-sm); }
.policy-card h4 { margin: 0 0 14px; font-size: 17px; color: var(--brand-700); text-align: center; }
.join-table { width: 100%; border-collapse: collapse; margin: 0; }
.join-table th, .join-table td {
  border: 1px solid rgba(15, 46, 87, .12); padding: 10px 14px;
  font-size: 14.5px; text-align: left;
}
.join-table th { width: 110px; background: #f1f7fd; color: var(--brand-700); }
.join-table td.policy-num { font-weight: 800; font-size: 16px; color: var(--brand-600); text-align: center; }
.join-support { margin: 0; padding-left: 20px; display: grid; gap: 8px; }
.join-support li { font-size: 14px; line-height: 1.7; color: var(--ink-700); }
.join-block-title { margin: 0 0 18px; text-align: center; font-size: clamp(20px, 2.6vw, 26px); }
.join-why, .join-flow { margin: 0 0 44px; }
.why-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.why-card {
  display: grid; grid-template-columns: 230px 1fr; overflow: hidden;
  border-radius: var(--radius); background: var(--brand-600); color: #fff;
  box-shadow: var(--shadow-md);
}
.why-card--flip { grid-template-columns: 1fr 230px; }
.why-card img { width: 100%; height: 100%; object-fit: cover; display: block; }
.why-card__body { padding: 18px 20px; }
.why-tag { display: inline-block; background: #fff; color: var(--brand-700); font-weight: 800; font-size: 14px; padding: 3px 12px; border-radius: 6px; margin-bottom: 10px; }
.why-card__body ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.why-card__body li { font-size: 14px; line-height: 1.6; color: #eaf3ff; }
.flow-steps { list-style: none; margin: 26px 0 0; padding: 0; display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.flow-steps li { position: relative; background: var(--brand-050); border: 1px solid var(--brand-100); border-radius: var(--radius); padding: 20px 10px 14px; text-align: center; }
.flow-steps i { position: absolute; top: -11px; left: 50%; transform: translateX(-50%); background: var(--brand-600); color: #fff; font-style: normal; font-weight: 800; font-size: 12px; padding: 2px 10px; border-radius: 999px; }
.flow-steps span { font-size: 15px; font-weight: 700; color: var(--ink-900); }
.join-flow__lead { margin: 8px 0 0; font-size: 14.5px; color: var(--ink-500); text-align: center; }
.join-form-wrap { margin: 0 auto; background: #fff; border-radius: 16px; padding: 34px 32px; box-shadow: var(--shadow-lg); }
.join-form { max-width: 760px; margin: 0 auto; }
.join-form h3 { margin: 0 0 6px; font-size: 22px; }

/* 新闻中心 */
.news-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.news-card {
  display: flex; flex-direction: column; overflow: hidden;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); transition: transform .25s ease, box-shadow .25s ease;
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.news-card__cover { display: block; aspect-ratio: 16 / 9; background: linear-gradient(135deg, var(--brand-700), var(--brand-500)); }
.news-card__cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.news-card__brand {
  display: flex; align-items: center; justify-content: center; height: 100%;
  color: rgba(255, 255, 255, .85); font-weight: 800; letter-spacing: .12em; font-size: 15px;
}
.news-card__body { display: flex; flex-direction: column; gap: 8px; flex: 1; padding: 18px 20px 20px; }
.news-card__date { font-size: 12.5px; color: var(--ink-500); }
.news-card__title { margin: 0; font-size: 16.5px; line-height: 1.5; }
.news-card__title a { color: var(--ink-900); text-decoration: none; }
.news-card__title a:hover { color: var(--brand-600); }
.news-card__summary { margin: 0; flex: 1; font-size: 13.5px; line-height: 1.7; color: var(--ink-500); }
.news-card__more { font-size: 13.5px; font-weight: 700; color: var(--brand-600); }
.news-empty { margin: 30px 0 0; text-align: center; color: var(--ink-500); font-size: 14.5px; }

/* 即时聚焦：大图铺底 + 右侧标题浮层 */
.focus-section { padding-bottom: clamp(32px, 4vw, 56px); }
.focus-hero {
  position: relative; overflow: hidden;
  height: clamp(340px, 36vw, 500px);
  border-radius: calc(var(--radius) + 4px);
  background: #0b1624; box-shadow: var(--shadow-md);
}
/* 同图虚化铺底：主图按原比例完整显示，四周留白由虚化层补齐 */
.focus-hero__blur {
  position: absolute; inset: -60px; z-index: 0;
  background-position: center; background-size: cover; background-repeat: no-repeat;
  filter: blur(34px) saturate(1.25) brightness(.52);
  transform: scale(1.08);
}
.focus-hero__bg {
  position: absolute; inset: 0; z-index: 1;
  display: block; width: 100%; height: 100%;
  object-fit: contain; object-position: left center;
}
.focus-hero__hit { position: absolute; inset: 0; z-index: 2; }
.focus-hero__tag {
  position: absolute; z-index: 4; top: 18px; left: 18px;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px 7px 15px; border-radius: 999px;
  background: rgba(11, 24, 39, .78); color: #fff;
  font-size: 13px; font-weight: 800; letter-spacing: .08em;
  box-shadow: 0 6px 18px rgba(0, 0, 0, .28);
}
.focus-hero__tag::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: #7cc0ff; box-shadow: 0 0 0 4px rgba(124, 192, 255, .28);
}
.focus-hero__panel {
  position: absolute; z-index: 3; top: 0; right: 0; bottom: 0;
  display: flex; align-items: center;
  width: min(430px, 42%); padding: 26px 18px 26px 44px;
  background: linear-gradient(90deg, rgba(8, 19, 32, 0) 0%, rgba(8, 19, 32, .86) 28%, rgba(8, 19, 32, .96) 100%);
}
.focus-list { width: 100%; list-style: none; margin: 0; padding: 0; }
.focus-item + .focus-item { margin-top: 3px; }
.focus-item a {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 8px 12px; border-radius: 8px;
  color: rgba(255, 255, 255, .84);
  font-size: 14.5px; line-height: 1.5;
  transition: background-color .25s, color .25s;
}
.focus-item a:hover { color: #fff; background: rgba(255, 255, 255, .12); }
.focus-item__idx {
  flex: 0 0 auto; padding-top: 1px;
  font-size: 12px; font-weight: 800; letter-spacing: .04em;
  color: rgba(255, 255, 255, .45);
}
.focus-item__text { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.focus-item.is-active a {
  background: linear-gradient(90deg, var(--brand-600), var(--brand-500));
  color: #fff; font-weight: 700;
  box-shadow: 0 8px 20px rgba(0, 74, 145, .38);
}
.focus-item.is-active .focus-item__idx { color: rgba(255, 255, 255, .85); }

/* 行业资讯：标题 + 发布时间列表 */
.news-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.news-row { border-bottom: 1px dashed var(--line); }
.news-row__link {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 17px 6px;
  transition: background-color .25s;
}
.news-row__title {
  min-width: 0; color: var(--ink-900);
  font-size: 15.5px; font-weight: 600; line-height: 1.6;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  transition: color .25s;
}
.news-row__date {
  flex: 0 0 auto; color: var(--ink-500); font-size: 13.5px;
  letter-spacing: .02em; font-variant-numeric: tabular-nums;
}
.news-row__link:hover { background: var(--brand-050); }
.news-row__link:hover .news-row__title { color: var(--brand-700); }
.news-list .news-row:first-child .news-row__title { color: var(--brand-600); }

@media (max-width: 1023px) {
  .focus-hero { height: auto; }
  .focus-hero__bg {
    position: relative; z-index: 1;
    width: 100%; height: auto; max-height: 74vw;
    object-fit: contain; object-position: center;
  }
  .focus-hero__blur { filter: blur(22px) saturate(1.2) brightness(.5); }
  .focus-hero__hit { display: none; }
  .focus-hero__tag { top: 12px; left: 12px; font-size: 12.5px; padding: 6px 13px 6px 12px; }
  .focus-hero__panel {
    position: relative; z-index: 3; width: 100%; padding: 14px 12px;
    align-items: stretch; background: #0e1c2c;
  }
  .focus-item a { padding: 9px 10px; font-size: 14px; }
  .news-row__link { gap: 12px; padding: 14px 4px; }
  .news-row__title {
    white-space: normal;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  }
}

/* 新闻管理入口 */
.news-admin { margin: 34px auto 0; max-width: 720px; border: 1px dashed var(--line); border-radius: 12px; padding: 14px 18px; background: #fafcff; }
.news-admin summary { cursor: pointer; font-size: 13.5px; font-weight: 600; color: var(--ink-500); }
.news-admin__row { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.news-admin__row input { flex: 1 1 320px; padding: 10px 14px; border: 1px solid var(--line); border-radius: 10px; font-size: 14px; font-family: inherit; }
.news-admin__row input:focus { outline: 2px solid var(--brand-100); border-color: var(--brand-500); }
.news-admin__msg { margin: 10px 0 0; font-size: 13px; color: var(--brand-600); line-height: 1.6; }

@media (max-width: 1023px) {
  .policy-cards { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .flow-steps { grid-template-columns: repeat(3, 1fr); }
  .news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .why-card, .why-card--flip { grid-template-columns: 1fr; }
  .why-card--flip img { order: -1; }
  .why-card img { height: 170px; }
  .flow-steps { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .cert-item { width: 112px; margin-right: 10px; }
  .cert-item--wide { width: 208px; }
  .cert-row::before, .cert-row::after { width: 40px; }
  .model-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 24px 0 18px; }
  .model-card__head h3 { font-size: 15.5px; }
  .model-card__body { padding: 12px 12px 10px; }
  .model-card__specs li { font-size: 12px; padding: 7px 0; }
  .model-card__specs b { font-size: 13px; }
}

/* 19.8元方案咨询二维码弹窗 */
.qr-modal { position: fixed; inset: 0; z-index: 120; }
.qr-modal__backdrop {
  position: absolute; inset: 0;
  background: rgba(7, 22, 41, .66);
  backdrop-filter: blur(3px);
}
.qr-modal__panel {
  position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: min(360px, calc(100vw - 40px));
  background: #fff; border-radius: 18px;
  padding: 30px 26px 24px; text-align: center;
  box-shadow: 0 40px 90px -30px rgba(0, 0, 0, .55);
}
.qr-modal__close {
  position: absolute; right: 10px; top: 10px;
  width: 32px; height: 32px; border: 0; border-radius: 50%;
  background: rgba(15, 46, 87, .08); color: #0f2e57;
  font-size: 18px; line-height: 1; cursor: pointer;
}
.qr-modal__close:hover { background: rgba(15, 46, 87, .16); }
.qr-modal__panel h3 {
  margin: 0 0 8px; font-size: 19px; color: #0f2e57;
}
.qr-modal__panel p {
  margin: 0 0 16px; font-size: 13.5px; line-height: 1.7;
  color: rgba(15, 46, 87, .72);
}
.qr-modal__panel img {
  display: block; width: 230px; height: 230px;
  margin: 0 auto; border-radius: 12px;
  border: 1px solid rgba(15, 46, 87, .1);
}
.qr-modal__tip { margin: 14px 0 0 !important; font-size: 12.5px !important; color: rgba(15, 46, 87, .55) !important; }
body.qr-modal-open { overflow: hidden; }
.footer-logo {
  height: 40px; width: auto; margin-bottom: 16px;
  filter: brightness(0) invert(1); opacity: .95;
}
.footer-brand p { margin: 0 0 18px; max-width: 360px; font-size: 13.5px; line-height: 1.85; }
.lang-switch--footer {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px; border: 1px solid rgba(255, 255, 255, .2); border-radius: 999px;
  background: rgba(255, 255, 255, .08); color: #fff;
  font-size: 13px; cursor: pointer;
  transition: background-color .2s, border-color .2s;
}
.lang-switch--footer:hover { background: rgba(255, 255, 255, .16); border-color: rgba(255, 255, 255, .4); }
.lang-switch--footer svg { width: 16px; height: 16px; }

.footer-col h4 { margin: 0 0 16px; font-size: 14px; color: #fff; }
.footer-links { display: grid; gap: 11px; list-style: none; }
.footer-links a { font-size: 13.5px; transition: color .2s; }
.footer-links a:hover { color: #fff; }
.footer-links--plain li { font-size: 13.5px; line-height: 1.6; }

.footer-bottom {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 10px; padding-top: 20px; padding-bottom: 24px;
  border-top: 1px solid rgba(255, 255, 255, .1);
  font-size: 12.5px; color: rgba(255, 255, 255, .55);
}
.footer-bottom p { margin: 0; }

.back-to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 90;
  display: grid; place-items: center;
  width: 46px; height: 46px;
  border: 0; border-radius: 50%;
  background: var(--brand-600); color: #fff;
  box-shadow: var(--shadow-lg); cursor: pointer;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity .25s, transform .25s, visibility .25s, background-color .2s;
}
.back-to-top.is-show { opacity: 1; visibility: visible; transform: none; }
.back-to-top:hover { background: var(--brand-700); }
.back-to-top svg { width: 22px; height: 22px; }

/* -------------------------------------------------------- 0. 首屏轮播 */
.hero-slides { position: absolute; inset: 0; }
.hero-slide {
  position: absolute; inset: 0;
  opacity: 0; transform: scale(1.06);
  transition: opacity 1.1s ease, transform 6s ease;
}
.hero-slide.is-active { opacity: 1; transform: scale(1); }
.hero-slide img { width: 100%; height: 100%; object-fit: cover; }
.hero-bg::after { z-index: 1; }
.hero-dots {
  position: absolute; left: 0; right: 0; bottom: 22px; z-index: 2;
  display: flex; gap: 10px; justify-content: center;
}
.hero-dot {
  width: 10px; height: 10px; padding: 0; border: 0; border-radius: 50%;
  background: rgba(255, 255, 255, .45); cursor: pointer;
  transition: background .25s, transform .25s;
}
.hero-dot.is-active { background: #fff; transform: scale(1.25); }
/* 产品卡片内的圆点 */
.hero-dots--card { bottom: 12px; }
.hero-dots--card .hero-dot { width: 8px; height: 8px; background: rgba(16, 40, 70, .3); }
.hero-dots--card .hero-dot.is-active { background: var(--brand-600); }

/* -------------------------------------------------------- 0. 独立页头 */
.page-banner {
  background: linear-gradient(118deg, #0c2a4c 0%, #12507f 58%, #0e6b6b 100%);
  color: #fff;
  padding: clamp(48px, 7vw, 84px) 0;
}
.page-banner .eyebrow { color: #9fe0ff; }
.page-banner .eyebrow::before { background: #9fe0ff; }
.page-banner .eyebrow::after { background: #9fe0ff; }
.page-banner h1 {
  margin: 0 0 12px; color: #fff;
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
}
.page-banner p {
  margin: 0; max-width: 680px;
  color: rgba(255, 255, 255, .8); font-size: 15.5px; line-height: 1.8;
}

/* ------------------------------------------------------------ 11. 响应式 */
/* 英文文案较长，做轻微排版适配 */
.lang-en .hero-title { letter-spacing: -.02em; }
.lang-en .nav-link { font-size: 14.5px; }
.lang-en .point b,
.lang-en .feature-card h3,
.lang-en .case-body h3 { letter-spacing: -.01em; }

/* 中型桌面：收起导航按钮，避免挤压 */
@media (max-width: 1199px) {
  .nav-cta { display: none; }
  .nav-link { padding: 9px 10px; font-size: 14.5px; }
  .lang-en .nav-link { font-size: 14px; }
}

/* 平板：切换为抽屉式导航，主体改单列 */
@media (max-width: 1023px) {
  :root { --header-h: 68px; }

  .brand-logo { height: 38px; }
  .brand-text { display: none; }
  .nav-toggle { display: block; }

  .nav {
    position: fixed; left: 0; right: 0; top: var(--header-h);
    display: block;
    padding: 10px 20px 24px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px -24px rgba(16, 40, 70, .45);
    opacity: 0; visibility: hidden; transform: translateY(-12px);
    transition: opacity .25s ease, transform .25s ease, visibility .25s;
  }
  .nav.is-open { opacity: 1; visibility: visible; transform: none; }

  .nav-list { display: block; }
  .nav-list li + li { border-top: 1px solid var(--line); }
  .nav-link { padding: 15px 4px; border-radius: 0; font-size: 16px; }
  .lang-en .nav-link { font-size: 16px; }
  .nav-link:hover { background: transparent; }
  .nav-link.is-active::after { display: none; }
  .nav-cta { display: flex; width: 100%; margin-top: 18px; padding: 14px 20px; }

  .hero-inner { grid-template-columns: minmax(0, 1fr); }
  .hero-visual { order: 2; max-width: 560px; }
  .hero-bg::after {
    background:
      linear-gradient(180deg, rgba(6, 24, 44, .9) 0%, rgba(7, 30, 56, .82) 60%, rgba(8, 34, 62, .9) 100%);
  }

  .about-grid,
  .contact-grid { grid-template-columns: minmax(0, 1fr); }
  .about-figure,
  .contact-form-wrap { position: static; }

  .case-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* 手机 */
@media (max-width: 767px) {
  .container { padding: 0 18px; }
  .section { padding: 56px 0; }

  .header-inner { gap: 10px; }
  .lang-btn { padding: 6px 11px; font-size: 12.5px; }

  .hero-visual { display: none; }
  .hero-stats { gap: 22px 32px; }
  .hero-title { font-size: 1.4rem; }

  .points { grid-template-columns: minmax(0, 1fr); gap: 14px; }
  .case-grid { grid-template-columns: minmax(0, 1fr); }
  .compare-cards { grid-template-columns: minmax(0, 1fr); }
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 28px; }

  .model-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 24px 0 18px; }

  .cta-band { flex-direction: column; align-items: stretch; text-align: left; }
  .cta-band .btn { width: 100%; }

  .client-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .map-frame iframe { height: clamp(210px, 64vw, 360px); }

  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .back-to-top { right: 16px; bottom: 16px; width: 42px; height: 42px; }
}

/* 平板：型号卡片 3 列 */
@media (min-width: 768px) and (max-width: 1180px) {
  .model-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
}

/* 小屏微调 */
@media (max-width: 400px) {
  .brand-logo { height: 34px; }
  .hero-title { font-size: 1.3rem; }
  .hero-title span, .hero-title em { font-size: .95em; }
  .badge { font-size: 12px; padding: 7px 12px; }
}

/* 降低动效偏好 */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}