/* ==========================================================
   海豚AI课堂 · 招商官网 样式表
   主题：浅色高级风 —— 云白底 + 海豚蓝点缀 + 金色招商高亮
   ========================================================== */

:root {
  --bg-page:   #e3eefb;   /* 柔和海蓝底（白卡片的清晰画布） */
  --bg-alt:    #d5e5f8;   /* 稍深海蓝底（隔段） */
  --bg-card:   #ffffff;
  --border:    rgba(13, 35, 80, .14);
  --text:      #0d2350;   /* 加深海军蓝文字 */
  --text-dim:  #47597e;
  --cyan:      #0a8fc4;
  --blue:      #1663e8;
  --sky:       #2f97ff;
  --gold:      #c78c04;
  --gold-btn:  #f5c542;
  --grad:      linear-gradient(100deg, #0a8fc4, #1663e8 55%, #2f97ff);
  --grad-gold: linear-gradient(100deg, #f8d97a, #f5c542 50%, #e8a920);
  --radius:    18px;
  --shadow:    0 14px 40px rgba(23, 64, 146, .14);
  --shadow-lg: 0 22px 60px rgba(23, 64, 146, .2);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
  background: var(--bg-page);
  color: var(--text);
  line-height: 1.75;
  overflow-x: hidden;
}

.container { width: min(1180px, 92%); margin: 0 auto; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style-position: inside; }

/* ---------- 渐变文字 ---------- */
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ==========================================================
   导航栏
   ========================================================== */
.navbar {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  padding: 14px 0;
  transition: all .35s ease;
  background: transparent;
}
.navbar.scrolled {
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  padding: 9px 0;
  box-shadow: 0 6px 24px rgba(23, 64, 146, .06);
}
.nav-inner { display: flex; align-items: center; gap: 28px; }

.brand { display: flex; align-items: center; gap: 10px; font-size: 21px; font-weight: 700; letter-spacing: 1px; color: var(--text); }
.brand-logo-img { width: 34px; height: 34px; border-radius: 9px; object-fit: contain; box-shadow: 0 3px 10px rgba(23, 64, 146, .18); }
.brand-logo { font-size: 27px; filter: drop-shadow(0 4px 10px rgba(30, 111, 245, .3)); }
.brand-text b { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  padding: 8px 13px; font-size: 14.5px; color: var(--text-dim);
  border-radius: 10px; transition: all .25s;
}
.nav-links a:hover { color: var(--blue); background: rgba(30, 111, 245, .08); }
.nav-links .nav-cta {
  color: #fff; font-weight: 700;
  background: var(--grad);
  box-shadow: 0 6px 18px rgba(30, 111, 245, .3);
}
.nav-links .nav-cta:hover { color: #fff; transform: translateY(-1px); box-shadow: 0 9px 24px rgba(30, 111, 245, .42); }

.nav-phone { text-align: right; line-height: 1.3; }
.nav-phone-label { display: block; font-size: 11px; color: var(--text-dim); letter-spacing: 2px; }
.nav-phone-num { font-size: 17px; font-weight: 800; color: var(--gold); letter-spacing: 1px; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 24px; height: 2.5px; background: var(--text); border-radius: 2px; transition: .3s; }

/* ==========================================================
   Hero 首屏
   ========================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  padding: 130px 0 90px;
  background: linear-gradient(180deg, #cd-def5 0%, #dceafa 55%, var(--bg-page) 100%);
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }

.orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .5; animation: drift 14s ease-in-out infinite alternate; }
.orb-1 { width: 480px; height: 480px; background: rgba(30, 111, 245, .30); top: -160px; left: -120px; }
.orb-2 { width: 420px; height: 420px; background: rgba(10, 159, 212, .26); bottom: -140px; right: -100px; animation-delay: -5s; }
.orb-3 { width: 300px; height: 300px; background: rgba(56, 168, 255, .30); top: 34%; left: 60%; animation-delay: -9s; }
@keyframes drift { to { transform: translate(50px, -36px) scale(1.12); } }

.grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(30, 111, 245, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 111, 245, .06) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(ellipse 75% 62% at 50% 42%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 75% 62% at 50% 42%, #000 30%, transparent 75%);
}

.wave-line {
  position: absolute; left: 0; right: 0; bottom: 0; height: 130px;
  background: var(--bg-page);
  clip-path: ellipse(85% 100% at 50% 100%);
}

.hero-content { position: relative; z-index: 2; }

.hero-badge {
  display: inline-block;
  padding: 8px 22px; margin-bottom: 30px;
  font-size: 14px; color: #0a7fae; letter-spacing: 2px;
  border: 1px solid rgba(10, 159, 212, .35);
  border-radius: 999px;
  background: rgba(10, 159, 212, .08);
  backdrop-filter: blur(6px);
}

.hero-title {
  font-size: clamp(44px, 7vw, 78px);
  font-weight: 900; line-height: 1.18; letter-spacing: 3px;
  color: var(--text);
}
.hero-sub-title {
  display: block; margin-top: 12px;
  font-size: clamp(22px, 3.2vw, 34px);
  font-style: normal; font-weight: 700;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 6px;
}

.hero-slogan {
  margin: 26px auto 0; font-size: clamp(14px, 1.7vw, 17px);
  color: var(--text-dim); letter-spacing: 3px;
}

.hero-actions { margin-top: 44px; display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-block; padding: 13px 34px;
  border-radius: 999px; font-size: 16px; font-weight: 700;
  border: 0; cursor: pointer; transition: all .28s ease;
  letter-spacing: 1px;
}
.btn-lg { padding: 15px 42px; font-size: 17px; }
.btn-gold {
  color: #3d2a00;
  background: var(--grad-gold);
  box-shadow: 0 10px 30px rgba(232, 169, 32, .4);
}
.btn-gold:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(232, 169, 32, .55); }
.btn-ghost { color: var(--blue); border: 1.5px solid rgba(30, 111, 245, .35); background: rgba(255, 255, 255, .7); }
.btn-ghost:hover { border-color: var(--blue); background: #fff; transform: translateY(-3px); box-shadow: 0 10px 24px rgba(30, 111, 245, .15); }
.btn-outline { color: var(--gold); border: 1.5px solid rgba(217, 154, 6, .5); background: #fff; }
.btn-outline:hover { background: #fffaf0; box-shadow: 0 8px 22px rgba(232, 169, 32, .18); }
.btn-block { display: block; width: 100%; text-align: center; }

.hero-stats {
  margin-top: 72px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
}
.stat {
  padding: 22px 10px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: #ffffff;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}
.stat-num { font-size: clamp(28px, 3.4vw, 40px); font-weight: 900; line-height: 1.1; }
.stat-num em { font-style: normal; font-size: .5em; margin-left: 2px; color: var(--blue); }
.stat-num .counter { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { margin-top: 6px; font-size: 13px; color: var(--text-dim); letter-spacing: 1px; }

.scroll-hint { position: absolute; left: 50%; bottom: 24px; transform: translateX(-50%); z-index: 2; opacity: .7; }
.mouse { display: block; width: 24px; height: 40px; border: 2px solid rgba(16, 41, 92, .4); border-radius: 14px; position: relative; }
.mouse::after {
  content: ""; position: absolute; left: 50%; top: 8px;
  width: 4px; height: 8px; border-radius: 2px;
  background: var(--blue); transform: translateX(-50%);
  animation: wheel 1.6s infinite;
}
@keyframes wheel { 0% { opacity: 1; top: 8px; } 100% { opacity: 0; top: 24px; } }

/* ==========================================================
   通用 Section
   ========================================================== */
.section { padding: 96px 0; position: relative; }
.section-alt { background: var(--bg-alt); }

.section-head { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block; margin-bottom: 14px;
  font-size: 13px; letter-spacing: 4px; color: #0a7fae;
  padding: 5px 18px; border-radius: 999px;
  border: 1px solid rgba(10, 159, 212, .3);
  background: rgba(10, 159, 212, .07);
}
.section-title { font-size: clamp(26px, 3.6vw, 38px); font-weight: 800; letter-spacing: 1px; color: var(--text); }
.section-desc { margin-top: 12px; color: var(--text-dim); font-size: 15.5px; }

/* ---------- 滚动渐入 ---------- */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .8s ease, transform .8s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ==========================================================
   关于我们
   ========================================================== */
.about-grid { display: grid; grid-template-columns: 1.35fr .9fr; gap: 48px; align-items: center; }
.about-text p { margin-bottom: 18px; color: var(--text-dim); font-size: 15.5px; }
.about-text b { color: var(--text); }
.about-mission { display: flex; gap: 16px; margin-top: 26px; flex-wrap: wrap; }
.mission-item {
  display: flex; align-items: center; gap: 10px;
  padding: 13px 20px; border-radius: 14px;
  border: 1px solid var(--border); background: #fff;
  font-size: 14.5px; box-shadow: var(--shadow);
}
.mission-icon { font-size: 22px; }

.about-team { display: flex; flex-direction: column; gap: 16px; }
.team-card {
  display: grid; grid-template-columns: 52px 1fr; align-items: center; gap: 6px 16px;
  padding: 22px 24px; border-radius: var(--radius);
  border: 1px solid var(--border); background: #fff;
  box-shadow: var(--shadow); transition: all .3s;
}
.team-card:hover { transform: translateX(8px); border-color: rgba(30, 111, 245, .4); box-shadow: var(--shadow-lg); }
.team-icon { grid-row: span 2; font-size: 34px; }
.team-card b { font-size: 17px; }
.team-card i { font-style: normal; font-size: 13px; color: var(--text-dim); }

/* ==========================================================
   产品定位
   ========================================================== */
.vs-wrap {
  display: grid; grid-template-columns: 1fr 90px 1.4fr;
  align-items: stretch; gap: 0; margin-bottom: 46px;
}
.vs-col {
  padding: 34px 36px; border-radius: var(--radius);
  border: 1px solid var(--border);
}
.vs-no {
  background: #dbe7f5;
  border-color: rgba(13, 35, 80, .16);
}
.vs-yes {
  background: linear-gradient(140deg, rgba(10, 159, 212, .08), rgba(30, 111, 245, .08)), #fff;
  border-color: rgba(30, 111, 245, .35);
  box-shadow: var(--shadow);
}
.vs-title { font-size: 20px; font-weight: 800; margin-bottom: 18px; color: var(--text); }
.vs-yes .vs-title { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.vs-col ul { list-style: none; }
.vs-col li { padding: 9px 0; font-size: 15.5px; color: var(--text-dim); border-bottom: 1px dashed rgba(16, 41, 92, .1); }
.vs-col li:last-child { border-bottom: 0; }
.vs-col li b { color: var(--text); }
.vs-no li { color: #8b98b4; }
.vs-divider { display: flex; align-items: center; justify-content: center; }
.vs-divider span {
  font-weight: 900; font-size: 18px; color: var(--gold);
  border: 2px solid rgba(217, 154, 6, .35); border-radius: 50%;
  width: 56px; height: 56px; display: flex; align-items: center; justify-content: center;
  background: #fff;
  box-shadow: 0 8px 20px rgba(232, 169, 32, .18);
}

.pain-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.pain-card {
  padding: 30px 28px; text-align: center;
  border-radius: var(--radius); border: 1px solid var(--border); background: #fff;
  box-shadow: var(--shadow); transition: all .32s;
}
.pain-card:hover { transform: translateY(-7px); border-color: rgba(30, 111, 245, .35); box-shadow: var(--shadow-lg); }
.pain-icon { font-size: 38px; }
.pain-card h4 { margin: 12px 0 8px; font-size: 18px; }
.pain-card p { font-size: 14.5px; color: var(--text-dim); }

/* ==========================================================
   AI 技术
   ========================================================== */
.tech-flow { display: flex; align-items: stretch; gap: 12px; margin-bottom: 46px; }
.tech-step {
  flex: 1; padding: 28px 26px; text-align: center; position: relative;
  border-radius: var(--radius); border: 1px solid var(--border); background: #fff;
  box-shadow: var(--shadow); transition: all .32s;
}
.tech-step:hover { border-color: rgba(10, 159, 212, .45); transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.tech-step-num {
  font-size: 40px; font-weight: 900; line-height: 1;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  opacity: .6; margin-bottom: 10px;
}
.tech-step h4 { font-size: 17px; margin-bottom: 6px; }
.tech-step p { font-size: 13.5px; color: var(--text-dim); }
.tech-arrow { display: flex; align-items: center; font-size: 24px; color: var(--blue); opacity: .7; }

.memory-level {
  padding: 34px 36px; border-radius: var(--radius);
  border: 1px solid var(--border); background: #fff;
  box-shadow: var(--shadow);
  margin-bottom: 34px;
}
.ml-head { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; flex-wrap: wrap; }
.ml-tag { font-size: 17px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.ml-note { font-size: 13px; color: var(--text-dim); letter-spacing: 1px; }
.ml-bars { display: grid; gap: 9px; }
.ml-bar { display: grid; grid-template-columns: 86px 1fr; align-items: center; gap: 14px; }
.ml-bar span { font-size: 13px; color: var(--text-dim); text-align: right; }
.ml-bar i {
  height: 16px; border-radius: 8px; display: block;
  background: linear-gradient(90deg, #9fd8f5, #1e6ff5 calc(var(--lv) * 14%), #e3ecf8 calc(var(--lv) * 14%));
  box-shadow: inset 0 0 0 1px rgba(16, 41, 92, .06);
}
.ml-legend { display: flex; justify-content: space-between; margin-top: 20px; font-size: 13.5px; color: var(--text-dim); flex-wrap: wrap; gap: 8px; }

.tech-slogan {
  text-align: center; font-size: clamp(17px, 2.2vw, 22px); font-weight: 600; color: var(--text);
  padding: 26px; border-radius: var(--radius);
  background: linear-gradient(100deg, rgba(10, 159, 212, .08), rgba(30, 111, 245, .08)), #fff;
  border: 1px solid rgba(10, 159, 212, .25);
  box-shadow: var(--shadow);
}
.tech-slogan b { color: var(--gold); font-weight: 800; }

/* ==========================================================
   课程体系
   ========================================================== */
.gift-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-bottom: 40px; }
.gift-card {
  position: relative; text-align: center; padding: 36px 26px 32px;
  border-radius: var(--radius); border: 1px solid var(--border); background: #fff;
  box-shadow: var(--shadow); transition: all .32s;
}
.gift-card-hot {
  border-color: rgba(217, 154, 6, .45);
  background: linear-gradient(150deg, #fff8e6, #ffffff);
}
.gift-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.gift-badge {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  font-size: 12.5px; font-weight: 700; color: #3d2a00; letter-spacing: 2px;
  padding: 5px 18px; border-radius: 999px; background: var(--grad-gold);
  box-shadow: 0 6px 16px rgba(232, 169, 32, .35);
  white-space: nowrap;
}
.gift-card h4 { font-size: 21px; margin-bottom: 8px; }
.gift-arrow { color: var(--blue); font-size: 18px; margin-bottom: 8px; }
.gift-card p { font-size: 16px; color: var(--text-dim); }
.gift-card p b { color: var(--gold); font-size: 18px; }

.course-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 14px; }
.course-item {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 22px; font-size: 15px;
  border-radius: 14px; border: 1px solid var(--border); background: #fff;
  box-shadow: var(--shadow); transition: all .28s;
}
.course-item:hover { border-color: rgba(30, 111, 245, .4); transform: translateX(6px); }
.ci-icon { font-size: 20px; }
.course-note { text-align: center; margin-top: 26px; color: var(--text-dim); font-size: 15.5px; }
.course-note b { color: var(--blue); }

/* ==========================================================
   三端数据
   ========================================================== */
.triple-wrap { display: flex; align-items: center; gap: 0; margin-bottom: 16px; }
.triple-node {
  flex: 1; text-align: center; padding: 26px 18px;
  border-radius: var(--radius); border: 1px solid var(--border); background: #fff;
  box-shadow: var(--shadow); transition: all .3s;
}
.triple-node:hover { border-color: rgba(10, 159, 212, .45); transform: translateY(-4px); }
.triple-node b { display: block; font-size: 17px; margin-top: 8px; }
.triple-node i { font-style: normal; font-size: 13px; color: var(--text-dim); }
.tn-icon { font-size: 32px; }
.triple-center {
  border-color: rgba(30, 111, 245, .45);
  background: linear-gradient(150deg, rgba(30, 111, 245, .08), rgba(10, 159, 212, .06)), #fff;
  transform: scale(1.08);
}
.triple-line { flex: .55; height: 2px; background: linear-gradient(90deg, var(--cyan), var(--blue)); opacity: .6; }
.triple-extra { max-width: 420px; margin: 0 auto 44px; }
.triple-extra .triple-node { transform: none; border-color: rgba(10, 159, 212, .35); }

.parent-features { max-width: 860px; margin: 0 auto; }
.pf-title { text-align: center; font-size: 19px; margin-bottom: 22px; color: #0a7fae; letter-spacing: 2px; }
.pf-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.pf-item {
  padding: 15px 22px; font-size: 14.5px;
  border-radius: 14px; border: 1px solid var(--border); background: #fff;
  box-shadow: var(--shadow);
}
.pf-note { text-align: center; margin-top: 22px; color: var(--text-dim); font-size: 15px; }
.pf-note b { color: var(--gold); }

/* ==========================================================
   落地模式
   ========================================================== */
.model-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.model-card {
  text-align: center; padding: 34px 22px;
  border-radius: var(--radius); border: 1px solid var(--border); background: #fff;
  box-shadow: var(--shadow); transition: all .32s;
}
.model-card:hover { transform: translateY(-7px); border-color: rgba(10, 159, 212, .4); box-shadow: var(--shadow-lg); }
.model-icon { font-size: 40px; }
.model-card h4 { margin: 14px 0 8px; font-size: 17px; }
.model-card p { font-size: 13.8px; color: var(--text-dim); }

/* ==========================================================
   核心优势
   ========================================================== */
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.adv-card {
  padding: 32px 28px; border-radius: var(--radius);
  border: 1px solid var(--border); background: #fff;
  box-shadow: var(--shadow);
  transition: all .32s; position: relative; overflow: hidden;
}
.adv-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: var(--grad); opacity: 0; transition: opacity .3s;
}
.adv-card:hover { transform: translateY(-7px); border-color: rgba(30, 111, 245, .35); box-shadow: var(--shadow-lg); }
.adv-card:hover::before { opacity: 1; }
.adv-card-gold::before { background: var(--grad-gold); }
.adv-card-gold { border-color: rgba(217, 154, 6, .4); background: linear-gradient(150deg, #fffaf0, #ffffff); }
.adv-icon { font-size: 34px; }
.adv-card h4 { margin: 13px 0 7px; font-size: 18.5px; }
.adv-card h4::after { content: ""; display: block; width: 26px; height: 3px; margin-top: 9px; border-radius: 2px; background: var(--grad); }
.adv-card-gold h4::after { background: var(--grad-gold); }
.adv-card p { font-size: 14.5px; color: var(--text-dim); }

/* ==========================================================
   下载中心
   ========================================================== */
.download-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.download-grid-campus { grid-template-columns: repeat(2, 1fr); max-width: 600px; margin: 0 auto; }
.dl-group-title {
  text-align: center; margin: 34px 0 20px; font-size: 17px; font-weight: 800;
  color: #0a7fae; letter-spacing: 3px;
}
.dl-group-title:first-of-type { margin-top: 0; }
.dl-card {
  position: relative; text-align: center;
  padding: 34px 22px 28px;
  border-radius: var(--radius); border: 1px solid var(--border); background: #fff;
  box-shadow: var(--shadow); transition: all .32s;
}
.dl-card:hover { transform: translateY(-7px); border-color: rgba(30, 111, 245, .4); box-shadow: var(--shadow-lg); }
.dl-card-hot {
  border-color: rgba(217, 154, 6, .45);
  background: linear-gradient(150deg, #fffaf0, #ffffff);
}
.dl-badge {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  font-size: 12px; font-weight: 800; color: #3d2a00; letter-spacing: 2px;
  padding: 4px 16px; border-radius: 999px; background: var(--grad-gold);
  box-shadow: 0 6px 16px rgba(232, 169, 32, .35);
  white-space: nowrap;
}
.dl-icon { font-size: 46px; line-height: 1.2; }
.dl-card h4 { margin: 12px 0 6px; font-size: 18px; }
.dl-card p { font-size: 13.5px; color: var(--text-dim); margin-bottom: 18px; min-height: 44px; }
.download-note { text-align: center; margin-top: 26px; font-size: 13.5px; color: var(--text-dim); }

/* ==========================================================
   扶持体系
   ========================================================== */
.support-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; margin-bottom: 40px; }
.support-col {
  border-radius: var(--radius); border: 1px solid var(--border); background: #fff;
  box-shadow: var(--shadow);
  padding: 0 28px 24px; overflow: hidden;
}
.support-col-head {
  display: flex; align-items: center; gap: 12px;
  margin: 0 -28px 20px; padding: 19px 28px;
  font-size: 18px; font-weight: 800;
}
.support-col-head small { margin-left: auto; font-size: 12.5px; font-weight: 400; color: var(--text-dim); }
.sh-online { background: linear-gradient(100deg, rgba(10, 159, 212, .12), rgba(30, 111, 245, .05)); border-bottom: 1px solid rgba(10, 159, 212, .3); }
.sh-offline { background: linear-gradient(100deg, rgba(56, 168, 255, .14), rgba(30, 111, 245, .05)); border-bottom: 1px solid rgba(56, 168, 255, .35); }
.sc-icon { font-size: 24px; }

.support-list { list-style: none; counter-reset: sup; }
.support-list li {
  counter-increment: sup;
  padding: 13px 0 13px 44px; position: relative;
  border-bottom: 1px dashed rgba(16, 41, 92, .1);
}
.support-list li:last-child { border-bottom: 0; }
.support-list li::before {
  content: counter(sup, decimal-leading-zero);
  position: absolute; left: 0; top: 15px;
  font-size: 13px; font-weight: 800;
  color: #0a7fae;
  border: 1px solid rgba(10, 159, 212, .4); border-radius: 8px;
  padding: 1px 7px;
  background: rgba(10, 159, 212, .06);
}
.support-list b { display: block; font-size: 15.5px; margin-bottom: 3px; }
.support-list span { font-size: 13.5px; color: var(--text-dim); display: block; }

.materials {
  border-radius: var(--radius); border: 1px solid rgba(217, 154, 6, .35);
  background: linear-gradient(150deg, #fffaf0, #ffffff);
  box-shadow: var(--shadow);
  padding: 0 30px 26px; overflow: hidden;
}
.materials-head {
  display: flex; align-items: center; gap: 12px;
  margin: 0 -30px 20px; padding: 18px 30px;
  font-size: 18px; font-weight: 800;
  background: linear-gradient(100deg, rgba(245, 197, 66, .25), rgba(245, 197, 66, .06));
  border-bottom: 1px solid rgba(217, 154, 6, .3);
}
.materials-head small { margin-left: auto; font-size: 12.5px; font-weight: 400; color: var(--text-dim); }
.materials-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.mat-item {
  padding: 14px 20px; font-size: 14.5px;
  border-radius: 12px; border: 1px solid rgba(217, 154, 6, .25); background: #fffdf5;
}

/* ==========================================================
   招商合作
   ========================================================== */
.coop { padding: 100px 0; background: linear-gradient(180deg, var(--bg-page) 0%, #cddef5 100%); }

.coop-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 60px; align-items: stretch; }
.coop-card {
  position: relative; text-align: center;
  padding: 44px 30px 36px;
  border-radius: 22px; border: 1px solid var(--border); background: #fff;
  box-shadow: var(--shadow); transition: all .32s;
}
.coop-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.coop-card-hot {
  border-color: rgba(217, 154, 6, .5);
  background: linear-gradient(160deg, #fffdf2, #ffffff);
  box-shadow: 0 18px 50px rgba(232, 169, 32, .18);
}
.coop-ribbon {
  position: absolute; top: -15px; left: 50%; transform: translateX(-50%);
  padding: 6px 22px; border-radius: 999px;
  font-size: 13px; font-weight: 800; color: #3d2a00; letter-spacing: 1px;
  background: var(--grad-gold);
  box-shadow: 0 8px 24px rgba(232, 169, 32, .4);
  white-space: nowrap;
}
.coop-name { font-size: 21px; font-weight: 800; margin-bottom: 14px; }
.coop-price { font-size: 52px; font-weight: 900; line-height: 1; color: var(--gold); }
.coop-price em { font-style: normal; font-size: .5em; margin-right: 4px; }
.coop-quota { margin: 12px 0 20px; font-size: 15px; color: var(--blue); letter-spacing: 1px; }
.coop-points { list-style: none; text-align: left; margin-bottom: 26px; }
.coop-points li { padding: 8px 0; font-size: 14.5px; color: var(--text-dim); border-bottom: 1px dashed rgba(16, 41, 92, .1); }
.coop-points li:last-child { border-bottom: 0; }
.coop-card-note { display: flex; flex-direction: column; }
.coop-note-slogan {
  margin-top: auto; padding-top: 20px;
  font-size: 15px; font-weight: 700; letter-spacing: 2px;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

/* ---------- 联系方式 ---------- */
.contact-wrap {
  display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px;
  padding: 46px; border-radius: 24px;
  border: 1px solid var(--border);
  background: #fff;
  box-shadow: var(--shadow-lg);
  align-items: center;
}
.contact-info h3 { font-size: 26px; font-weight: 800; margin-bottom: 14px; }
.contact-info > p { color: var(--text-dim); font-size: 15px; margin-bottom: 18px; }
.contact-info ul { list-style: none; margin-bottom: 0; }
.contact-info li { padding: 6px 0; font-size: 14.5px; color: var(--text-dim); }
.contact-lines { display: flex; flex-direction: column; gap: 12px; }
.contact-line {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 22px; border-radius: 12px;
  border: 1px solid var(--border); background: var(--bg-alt);
  font-size: 14.5px;
}
.contact-line span { color: var(--text-dim); }
.contact-line b { color: var(--gold); font-size: 16px; }

/* ==========================================================
   页脚（深蓝收尾，与浅色主体形成高级对比）
   ========================================================== */
.footer { padding: 60px 0 40px; text-align: center; background: #0a2350; border-top: 1px solid rgba(255, 255, 255, .08); }
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.footer-brand { font-size: 23px; font-weight: 800; color: #fff; display: flex; align-items: center; gap: 10px; }
.brand-logo-img-footer { width: 30px; height: 30px; border-radius: 8px; }
.footer-brand b { background: linear-gradient(100deg, #29b6f6, #38a8ff); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.footer-slogan { margin-top: 12px; font-size: 17px; font-weight: 700; letter-spacing: 3px; background: linear-gradient(100deg, #29b6f6, #38a8ff); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.footer-slogan-sub { color: #9db4dd; font-size: 14px; letter-spacing: 4px; }
.footer-company { margin-top: 14px; color: #9db4dd; font-size: 13.5px; }
.footer-copy { margin-top: 6px; color: rgba(255, 255, 255, .35); font-size: 12.5px; }
.footer-icp { margin-top: 4px; }
.footer-icp a { color: rgba(255, 255, 255, .35); font-size: 12.5px; transition: color .25s; }
.footer-icp a:hover { color: #9db4dd; }

/* ==========================================================
   响应式
   ========================================================== */
@media (max-width: 1024px) {
  .nav-phone { display: none; }
  .about-grid, .support-cols, .contact-wrap { grid-template-columns: 1fr; }
  .vs-wrap { grid-template-columns: 1fr; }
  .vs-divider { padding: 14px 0; }
  .model-grid, .adv-grid, .coop-grid { grid-template-columns: 1fr 1fr; }
  .download-grid { grid-template-columns: 1fr 1fr; }
  .tech-flow { flex-direction: column; }
  .tech-arrow { justify-content: center; transform: rotate(90deg); }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; gap: 2px; padding: 14px;
    background: rgba(255, 255, 255, .98); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 20px 40px rgba(23, 64, 146, .12);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 16px; }

  .hero { padding-top: 110px; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .pain-grid, .gift-grid, .model-grid, .adv-grid, .coop-grid,
  .pf-grid, .materials-grid { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: 1fr 1fr; }
  .triple-wrap { flex-direction: column; gap: 14px; }
  .triple-line { width: 2px; height: 26px; flex: none; margin: 0 auto; background: linear-gradient(180deg, var(--cyan), var(--blue)); }
  .triple-center { transform: none; }
  .contact-wrap { padding: 30px 22px; }
  .section { padding: 68px 0; }
}

/* ---------- 减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}