/* ==========================================================================
   哈尔滨沐麦科技有限公司 官网样式
   ========================================================================== */

:root {
  --primary: #1a5bff;
  --primary-dark: #0f42c4;
  --primary-soft: #eaf0ff;
  --cyan: #22d3ee;
  --green: #16a34a;
  --ink: #0f172a;
  --text: #475569;
  --muted: #94a3b8;
  --line: #e2e8f0;
  --bg: #ffffff;
  --bg-alt: #f6f8fc;
  --radius: 16px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 12px 32px rgba(15, 23, 42, 0.10);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.16);
  --maxw: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img, svg { display: block; max-width: 100%; }

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

h1, h2, h3, h4 { color: var(--ink); line-height: 1.25; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: 999px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; transition: all .25s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px rgba(26, 91, 255, .28); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 12px 26px rgba(26, 91, 255, .36); }
.btn-ghost { background: rgba(255,255,255,.08); color: #fff; border-color: rgba(255,255,255,.35); backdrop-filter: blur(6px); }
.btn-ghost:hover { background: rgba(255,255,255,.18); transform: translateY(-2px); }
.btn-sm { padding: 9px 20px; font-size: 14px; }
.btn-lg { padding: 15px 32px; font-size: 16px; }
.btn-block { width: 100%; }

/* 顶部导航 */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background .3s ease, box-shadow .3s ease, padding .3s ease;
  padding: 18px 0;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, .92); backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm); padding: 10px 0;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }

.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 19px; color: #fff; letter-spacing: .5px; }
.brand-text small { font-size: 11px; color: rgba(255,255,255,.7); letter-spacing: .5px; }
.site-header.scrolled .brand-text strong { color: var(--ink); }
.site-header.scrolled .brand-text small { color: var(--muted); }

.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 8px 15px; border-radius: 999px; font-size: 15px; font-weight: 500;
  color: rgba(255,255,255,.85); transition: all .2s ease;
}
.nav-link:hover { color: #fff; background: rgba(255,255,255,.12); }
.nav-link.active { color: #fff; background: rgba(255,255,255,.16); }
.site-header.scrolled .nav-link { color: var(--text); }
.site-header.scrolled .nav-link:hover { color: var(--primary); background: var(--primary-soft); }
.site-header.scrolled .nav-link.active { color: var(--primary); background: var(--primary-soft); }

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

.nav-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 42px; height: 42px; border: none; border-radius: 10px;
  background: rgba(255,255,255,.12); cursor: pointer; padding: 10px;
}
.nav-toggle span { display: block; height: 2px; width: 100%; background: #fff; border-radius: 2px; transition: all .3s ease; }
.site-header.scrolled .nav-toggle { background: var(--primary-soft); }
.site-header.scrolled .nav-toggle span { background: var(--primary); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-toggle.open { background: var(--primary-soft); }
.nav-toggle.open span { background: var(--primary); }

/* Hero */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  background: linear-gradient(150deg, #081a45 0%, #0b2f7a 45%, #123f9e 100%);
  color: #fff; overflow: hidden; padding: 140px 0 100px;
}
.hero-bg { position: absolute; inset: 0; }
.grid-lines {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 60px 60px;
  -webkit-mask-image: radial-gradient(ellipse at 30% 40%, #000 0%, transparent 70%);
  mask-image: radial-gradient(ellipse at 30% 40%, #000 0%, transparent 70%);
}
.glow { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .55; }
.glow-a { width: 500px; height: 500px; background: #1a5bff; top: -120px; right: -80px; }
.glow-b { width: 420px; height: 420px; background: #22d3ee; bottom: -140px; left: -100px; opacity: .3; }

.hero-inner {
  position: relative; z-index: 2; display: grid;
  grid-template-columns: 1.1fr .9fr; gap: 60px; align-items: center;
}
.hero-badge {
  display: inline-block; padding: 7px 16px; border-radius: 999px; font-size: 13px; font-weight: 600;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.25);
  color: #cfe3ff; margin-bottom: 22px; letter-spacing: 1px;
}
.hero h1 { font-size: clamp(32px, 4.5vw, 52px); font-weight: 800; color: #fff; letter-spacing: .5px; }
.text-gradient { background: linear-gradient(90deg, #6ea8ff, #22d3ee); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-slogan { margin-top: 16px; font-size: clamp(18px, 2.6vw, 24px); font-weight: 600; color: #a7c4ff; letter-spacing: 1px; }
.hero-sub { margin: 18px 0 30px; font-size: 17px; color: rgba(255,255,255,.82); max-width: 620px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }

/* Hero 可视化 */
.hero-visual { position: relative; }
.meter-card {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.16);
  border-radius: 20px; backdrop-filter: blur(14px); box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.meter-card-head {
  display: flex; align-items: center; gap: 8px; padding: 14px 18px;
  font-size: 13px; color: rgba(255,255,255,.85); border-bottom: 1px solid rgba(255,255,255,.12);
}
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot-green { background: #34d399; }
.dot-red { background: #f87171; }
.dot-yellow { background: #fbbf24; }
.meter-card-body { padding: 24px; display: flex; gap: 24px; align-items: center; }
.meter-ring { position: relative; flex-shrink: 0; }
.meter-ring-num {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; line-height: 1;
}
.meter-ring-num { font-size: 26px; font-weight: 800; color: #fff; }
.meter-ring-num span { font-size: 16px; color: var(--cyan); }
.meter-ring-num small { font-size: 11px; color: rgba(255,255,255,.6); margin-top: 6px; }
.meter-stats { flex: 1; display: flex; flex-direction: column; gap: 16px; }
.meter-stats li { display: flex; flex-direction: column; line-height: 1.3; }
.meter-stats span { font-size: 12px; color: rgba(255,255,255,.6); }
.meter-stats strong { font-size: 22px; color: #fff; font-weight: 800; }
.meter-stats small { color: rgba(255,255,255,.5); font-size: 12px; }

.float-chip {
  position: absolute; display: flex; align-items: center; gap: 10px;
  background: #fff; color: var(--ink); border-radius: 14px; padding: 12px 16px;
  box-shadow: var(--shadow-md); animation: float 5s ease-in-out infinite;
}
.float-chip .chip-icon { font-size: 22px; }
.float-chip strong { display: block; font-size: 14px; line-height: 1.2; }
.float-chip small { color: var(--muted); font-size: 12px; }
.chip-a { top: -18px; right: -8px; }
.chip-b { bottom: -20px; left: -14px; animation-delay: 1.2s; }

@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }

.scroll-hint {
  position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%);
  width: 26px; height: 42px; border: 2px solid rgba(255,255,255,.4); border-radius: 999px;
  display: flex; justify-content: center; padding-top: 8px;
}
.scroll-hint span { width: 3px; height: 8px; border-radius: 3px; background: #fff; animation: scrollDot 1.6s infinite; }
@keyframes scrollDot { 0% { opacity: 0; transform: translateY(0); } 40% { opacity: 1; } 80% { opacity: 0; transform: translateY(14px); } 100% { opacity: 0; } }

/* 通用 section */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-tag {
  display: inline-block; padding: 6px 16px; border-radius: 999px; font-size: 13px; font-weight: 600;
  background: var(--primary-soft); color: var(--primary); margin-bottom: 16px; letter-spacing: 1px;
}
.section-head h2 { font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; margin-bottom: 16px; }
.section-head p { font-size: 16px; color: var(--text); }

/* 关于我们 */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.about-text p { margin-bottom: 16px; font-size: 16px; }
.about-text b { color: var(--ink); }
.about-list { margin: 22px 0 28px; display: flex; flex-direction: column; gap: 12px; }
.about-list li { display: flex; align-items: center; gap: 12px; font-weight: 500; color: var(--ink); }
.about-list span {
  width: 24px; height: 24px; border-radius: 50%; background: var(--primary-soft);
  color: var(--primary); display: inline-flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; flex-shrink: 0;
}
.about-cta { display: flex; gap: 14px; flex-wrap: wrap; }

.about-visual { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.about-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 24px; box-shadow: var(--shadow-sm); transition: all .3s ease;
}
.about-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--primary); }
.about-card-icon { font-size: 34px; margin-bottom: 14px; }
.about-card h3 { font-size: 18px; margin-bottom: 8px; }
.about-card p { font-size: 14px; color: var(--text); }

/* 产品中心 */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.product-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 28px; box-shadow: var(--shadow-sm); transition: all .3s ease;
  position: relative; overflow: hidden;
}
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); border-color: var(--primary); }
.product-card::after {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--cyan)); opacity: 0; transition: opacity .3s ease;
}
.product-card:hover::after { opacity: 1; }
.product-thumb {
  width: 96px; height: 96px; border-radius: 20px; display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.thumb-1 { background: #eaf0ff; }
.thumb-2 { background: #e0f2fe; }
.thumb-3 { background: #dcfce7; }
.thumb-4 { background: #f3e8ff; }
.thumb-5 { background: #fef3c7; }
.thumb-6 { background: #cffafe; }
.product-card h3 { font-size: 19px; margin-bottom: 10px; }
.product-card p { font-size: 14px; margin-bottom: 18px; }
.product-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.product-tags li {
  font-size: 12px; padding: 4px 12px; border-radius: 999px;
  background: var(--bg-alt); color: var(--text); border: 1px solid var(--line);
}

/* 云售电平台 —— 真实运行界面展示 */
.platform-shot { margin: 0 auto; max-width: 1180px; text-align: center; }
.platform-shot-img {
  display: block; width: 100%; height: auto;
  border-radius: 18px; background: #fff;
  border: 1px solid var(--hairline, rgba(16,24,40,.08));
  box-shadow: 0 2px 6px rgba(4,16,40,.06), 0 18px 40px rgba(4,16,40,.14), 0 50px 110px rgba(4,16,40,.22);
}
.platform-shot figcaption {
  margin-top: 22px; display: flex; flex-direction: column; gap: 6px;
  font-size: 14px; color: var(--muted);
}
.platform-shot figcaption strong { color: var(--ink); font-size: 16px; font-weight: 700; letter-spacing: -.01em; }
.platform-shot figcaption span { font-size: 13.5px; letter-spacing: .3px; }

.platform-features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 64px; }
.feature {
  display: flex; gap: 14px; align-items: flex-start; background: #fff;
  border: 1px solid var(--line); border-radius: 14px; padding: 20px; transition: all .3s ease;
}
.feature:hover { border-color: var(--primary); box-shadow: var(--shadow-sm); transform: translateY(-3px); }
.feature-icon { font-size: 26px; flex-shrink: 0; }
.feature h3 { font-size: 16px; margin-bottom: 4px; }
.feature p { font-size: 13.5px; color: var(--text); }

/* 私有化部署 */
.section-deploy {
  position: relative; color: #fff; overflow: hidden;
  background: linear-gradient(160deg, #081a45 0%, #0b2f7a 55%, #123f9e 100%);
}
.deploy-bg { position: absolute; inset: 0; }
.section-deploy .grid-lines {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 60px 60px;
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 75%);
  mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 75%);
}
.deploy-inner { position: relative; z-index: 2; }
.section-deploy .section-head h2 { color: #fff; }
.section-deploy .section-head p { color: rgba(255,255,255,.8); }
.section-deploy .section-tag { background: rgba(255,255,255,.12); color: #cfe3ff; border: 1px solid rgba(255,255,255,.22); }

.deploy-points { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 8px; }
.deploy-point {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--radius); padding: 28px 24px; transition: all .3s ease; backdrop-filter: blur(8px);
}
.deploy-point:hover { transform: translateY(-6px); background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.3); }
.deploy-point-icon { font-size: 34px; margin-bottom: 14px; }
.deploy-point h3 { color: #fff; font-size: 18px; margin-bottom: 8px; }
.deploy-point p { color: rgba(255,255,255,.75); font-size: 14px; }

.deploy-modes { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 44px; }
.deploy-mode {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--radius); padding: 30px 28px;
}
.deploy-mode h3 { color: #fff; font-size: 20px; margin-bottom: 10px; }
.deploy-mode > p { color: rgba(255,255,255,.75); font-size: 14.5px; margin-bottom: 18px; }
.deploy-mode ul { display: flex; flex-direction: column; gap: 10px; }
.deploy-mode ul li { color: rgba(255,255,255,.8); font-size: 14px; padding-left: 22px; position: relative; }
.deploy-mode ul li::before { content: "✓"; position: absolute; left: 0; color: #7db4ff; font-weight: 700; }
.deploy-mode-hot {
  background: linear-gradient(135deg, rgba(26,91,255,.3), rgba(34,211,238,.16));
  border: 1px solid rgba(110,168,255,.55); box-shadow: 0 0 42px rgba(26,91,255,.28); position: relative;
}
.mode-badge {
  position: absolute; top: -13px; left: 28px; background: linear-gradient(90deg, #1a5bff, #22d3ee);
  color: #fff; font-size: 12px; font-weight: 700; padding: 4px 14px; border-radius: 999px;
}

.deploy-flow { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 44px; }
.flow-step {
  flex: 1 1 150px; text-align: center; background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12); border-radius: 14px; padding: 22px 12px;
}
.flow-step span { display: block; font-size: 22px; font-weight: 800; color: var(--cyan); margin-bottom: 8px; }
.flow-step strong { display: block; color: #fff; font-size: 15px; margin-bottom: 4px; }
.flow-step small { color: rgba(255,255,255,.55); font-size: 12px; }

.deploy-cta { text-align: center; margin-top: 44px; }

/* 平台功能条 */
.feature-strip { background: linear-gradient(120deg, #0b2f7a, #123f9e); padding: 40px 0; }
.feature-strip-inner { display: flex; flex-wrap: wrap; gap: 16px 36px; justify-content: center; }
.fs-item { color: #fff; font-size: 16px; font-weight: 500; display: flex; align-items: center; gap: 8px; }

/* 解决方案 */
.solution-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.solution-card {
  background: #fff; border-radius: var(--radius); padding: 34px 26px;
  border: 1px solid var(--line); box-shadow: var(--shadow-sm); text-align: center; transition: all .3s ease;
}
.solution-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); border-color: var(--primary); }
.solution-icon {
  width: 64px; height: 64px; margin: 0 auto 18px; border-radius: 18px; font-size: 30px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary-soft), #e0fbff);
}
.solution-card h3 { font-size: 19px; margin-bottom: 10px; }
.solution-card p { font-size: 14px; }

/* 成功案例（单行跑马灯） */
.case-marquee {
  position: relative; width: 100%; overflow: hidden; padding: 10px 0 26px;
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 7%, #000 93%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0, #000 7%, #000 93%, transparent 100%);
}
.case-track {
  display: flex; width: max-content;
  animation: caseMarquee 48s linear infinite;
  will-change: transform;
}
.case-marquee:hover .case-track { animation-play-state: paused; }

@keyframes caseMarquee {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(-50%, 0, 0); }
}

.case-card {
  flex: 0 0 auto; width: 340px; margin-right: 24px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column; align-items: flex-start;
  transition: transform .5s var(--ease, ease), box-shadow .5s var(--ease, ease), border-color .35s ease;
}
.case-card:hover { transform: translateY(-6px); border-color: var(--primary); }
.case-icon {
  width: 58px; height: 58px; border-radius: 16px; font-size: 28px; display: flex;
  align-items: center; justify-content: center; background: var(--bg-alt); margin-bottom: 16px;
}
.case-tag {
  font-size: 12px; color: var(--primary); background: var(--primary-soft);
  padding: 3px 12px; border-radius: 999px; margin-bottom: 10px;
}
.case-card h3 { font-size: 19px; margin-bottom: 8px; }
.case-card p { font-size: 14px; color: var(--text); }

/* 新闻 */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.news-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; display: flex; gap: 20px; box-shadow: var(--shadow-sm); transition: all .3s ease;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--primary); }
.news-date {
  flex-shrink: 0; text-align: center; min-width: 56px; height: 62px;
  background: var(--primary-soft); border-radius: 12px; display: flex; flex-direction: column;
  align-items: center; justify-content: center; line-height: 1.1;
}
.news-date strong { font-size: 22px; color: var(--primary); }
.news-date span { font-size: 11px; color: var(--text); }
.news-body h3 { font-size: 16px; margin-bottom: 8px; }
.news-body p { font-size: 13.5px; color: var(--text); margin-bottom: 12px; }
.news-link { color: var(--primary); font-weight: 600; font-size: 14px; }

/* 联系我们 */
.contact-info { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.contact-card {
  background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 24px;
  display: flex; gap: 14px; align-items: flex-start; box-shadow: var(--shadow-sm);
}
.contact-icon { font-size: 26px; }
.contact-card h3 { font-size: 15px; margin-bottom: 6px; }
.contact-card p { font-size: 13.5px; color: var(--text); }

/* 页脚 */
.site-footer { background: #081a45; color: rgba(255,255,255,.72); }
.footer-inner {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 40px; padding: 64px 24px 40px;
}
.footer-brand p { margin-top: 18px; font-size: 14px; max-width: 320px; }
.footer-brand .brand-text strong { color: #fff; }
.footer-brand .brand-text small { color: rgba(255,255,255,.55); }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 18px; }
.footer-col a { display: block; font-size: 14px; margin-bottom: 12px; transition: color .2s; }
.footer-col a:hover { color: var(--cyan); }
.footer-col p { font-size: 14px; margin-bottom: 10px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 22px 0; }
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,.45); text-align: center; }
.footer-bottom .icp { margin-top: 6px; }
.footer-bottom .icp a { color: rgba(255,255,255,.5); transition: color .2s; }
.footer-bottom .icp a:hover { color: var(--cyan); }

/* 滚动进入动画 */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* 响应式 */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 50px; }
  .hero-visual { max-width: 480px; margin: 0 auto; }
  .platform-features { grid-template-columns: repeat(2, 1fr); }
  .solution-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-info { grid-template-columns: repeat(2, 1fr); }
  .deploy-points { grid-template-columns: repeat(2, 1fr); }
  .deploy-modes { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .main-nav {
    position: fixed; top: 0; right: -100%; width: 76%; max-width: 320px; height: 100vh;
    background: #fff; flex-direction: column; align-items: flex-start; padding: 96px 28px 40px;
    gap: 6px; box-shadow: var(--shadow-lg); transition: right .35s ease;
  }
  .main-nav.open { right: 0; }
  .main-nav .nav-link { color: var(--ink) !important; width: 100%; padding: 13px 16px; font-size: 16px; }
  .main-nav .nav-link:hover, .main-nav .nav-link.active { background: var(--primary-soft); color: var(--primary) !important; }
  .nav-toggle { display: flex; z-index: 101; }
  .header-actions .btn-sm { display: none; }

  /* Hero 移动端 */
  .hero { padding: 110px 0 70px; }
  .hero h1 { font-size: 32px; }
  .hero-sub { font-size: 15px; }
  .hero-badge { font-size: 12px; padding: 6px 14px; }
  .hero-btns .btn-lg { padding: 12px 24px; font-size: 15px; }
  .hero-visual { max-width: 360px; }
  .chip-a { right: 4px; top: -14px; }
  .chip-b { left: 4px; bottom: -14px; }
  .float-chip { padding: 10px 12px; gap: 8px; }
  .float-chip .chip-icon { font-size: 18px; }
  .scroll-hint { display: none; }

  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-visual { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .platform-features { grid-template-columns: 1fr; }
  .solution-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .case-card { width: 292px; margin-right: 16px; padding: 26px 22px; }
  .case-track { animation-duration: 34s; }
  .contact-info { grid-template-columns: 1fr; }
  .deploy-points { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .section { padding: 68px 0; }
  .section-head { margin-bottom: 40px; }
  .section-head h2 { font-size: 26px; }

  /* 平台界面：图片圆角与投影收窄 */
  .platform-shot-img { border-radius: 14px; }
  .platform-features { margin-top: 44px; }
  .platform-shot figcaption { margin-top: 16px; font-size: 13px; }
  .platform-shot figcaption strong { font-size: 15px; }
}

/* 小屏手机 */
@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .hero { padding: 96px 0 56px; }
  .hero h1 { font-size: 26px; }
  .hero-sub { font-size: 14px; }
  .hero-btns { flex-direction: column; align-items: stretch; }
  .hero-btns .btn { width: 100%; }
  .brand-text small { display: none; }
  .meter-card-body { padding: 16px; gap: 12px; }
  .meter-ring svg { width: 92px; height: 92px; }
  .meter-ring-num { font-size: 22px; }
  .meter-stats strong { font-size: 18px; }
  .meter-stats span, .meter-stats small { font-size: 11px; }
  .section-head h2 { font-size: 23px; }
}

/* ==========================================================================
   高级感视觉升级层 (Premium Polish Layer)
   ========================================================================== */

:root {
  --ease: cubic-bezier(.22, 1, .36, 1);
  --ease-soft: cubic-bezier(.4, 0, .2, 1);
  --ink-900: #0b1220;
  --hairline: rgba(16, 24, 40, .08);
  --elev-1: 0 1px 2px rgba(16,24,40,.04), 0 4px 14px rgba(16,24,40,.05);
  --elev-2: 0 2px 6px rgba(16,24,40,.05), 0 14px 34px rgba(16,24,40,.09);
  --elev-3: 0 10px 24px rgba(16,24,40,.08), 0 32px 64px rgba(16,24,40,.14);
  --noise: url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20width='160'%20height='160'%3E%3Cfilter%20id='n'%3E%3CfeTurbulence%20type='fractalNoise'%20baseFrequency='.85'%20numOctaves='3'%20stitchTiles='stitch'/%3E%3C/filter%3E%3Crect%20width='160'%20height='160'%20filter='url(%23n)'%20opacity='.42'/%3E%3C/svg%3E");
}

/* --- 细节：滚动条 / 选中态 / 字体渲染 --- */
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: #f4f7fb; }
::-webkit-scrollbar-thumb { background: #c7d2e2; border-radius: 99px; border: 3px solid #f4f7fb; }
::-webkit-scrollbar-thumb:hover { background: #a8b7cd; }
::selection { background: rgba(26, 91, 255, .16); color: var(--ink-900); }
body { text-rendering: optimizeLegibility; }

/* --- 排版：标题字距与行高 --- */
h1, h2, h3, h4 { letter-spacing: -.02em; }
.section-head h2 { letter-spacing: -.035em; line-height: 1.18; }
.section-head p { line-height: 1.85; }

/* --- 区块留白与装饰线 --- */
.section { padding: 116px 0; }
.section-head { margin-bottom: 64px; }
.section-tag {
  padding: 7px 18px; letter-spacing: 2.5px; font-weight: 600;
  box-shadow: inset 0 0 0 1px rgba(26,91,255,.14), 0 2px 8px rgba(26,91,255,.08);
}
.section-head h2::after {
  content: ""; display: block; width: 52px; height: 3px; border-radius: 3px;
  margin: 24px auto 0;
  background: linear-gradient(90deg, var(--primary), var(--cyan));
}

/* --- 按钮：渐变 + 内高光 + 柔和投影 --- */
.btn {
  letter-spacing: .2px;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease),
              background .3s var(--ease-soft), color .3s var(--ease-soft), border-color .3s var(--ease-soft);
}
.btn-primary {
  background: linear-gradient(135deg, #2c6bff 0%, #1148dd 100%);
  box-shadow: 0 1px 2px rgba(12,45,140,.24), 0 10px 24px rgba(26,91,255,.28),
              inset 0 1px 0 rgba(255,255,255,.24);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #3d78ff 0%, #1750ea 100%);
  transform: translateY(-2px);
  box-shadow: 0 2px 5px rgba(12,45,140,.26), 0 18px 36px rgba(26,91,255,.34),
              inset 0 1px 0 rgba(255,255,255,.3);
}
.btn-ghost { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.28); }
.btn-ghost:hover { background: rgba(255,255,255,.2); border-color: rgba(255,255,255,.5); }

/* --- 顶部导航：磨砂玻璃 --- */
.site-header { transition: padding .4s var(--ease), background .4s var(--ease-soft), box-shadow .4s var(--ease-soft); }
.site-header.scrolled {
  background: rgba(255,255,255,.76);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--hairline);
  box-shadow: 0 1px 0 rgba(16,24,40,.02), 0 10px 30px rgba(16,24,40,.06);
}
.nav-link { transition: color .3s var(--ease-soft), background .3s var(--ease-soft); }

/* --- Hero：多层光晕 + 细腻颗粒质感 --- */
.hero {
  background:
    radial-gradient(1100px 620px at 82% 8%, rgba(34,211,238,.20), transparent 62%),
    radial-gradient(900px 560px at 10% 92%, rgba(26,91,255,.30), transparent 64%),
    linear-gradient(158deg, #04102b 0%, #071d47 42%, #0b2f75 100%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 1;
  background-image: var(--noise); opacity: .35; mix-blend-mode: overlay;
}
.hero-inner { z-index: 3; }
.scroll-hint { z-index: 3; }
.hero h1 { letter-spacing: -.03em; text-shadow: 0 2px 34px rgba(4,16,43,.5); }
.hero-badge {
  backdrop-filter: blur(8px);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.18), 0 6px 20px rgba(4,16,43,.3);
}
.meter-card { box-shadow: 0 30px 70px rgba(3,12,34,.55), inset 0 1px 0 rgba(255,255,255,.14); }
.float-chip { box-shadow: 0 12px 30px rgba(3,12,34,.28), inset 0 0 0 1px rgba(16,24,40,.04); }

/* --- 卡片：统一留白、描边与悬浮层次 --- */
.product-card, .about-card, .solution-card, .case-card,
.news-card, .feature, .contact-card {
  border-color: var(--hairline);
  box-shadow: var(--elev-1);
  transition: transform .5s var(--ease), box-shadow .5s var(--ease), border-color .35s var(--ease-soft);
}
.product-card:hover, .about-card:hover, .solution-card:hover,
.case-card:hover, .news-card:hover, .contact-card:hover {
  box-shadow: var(--elev-3);
  border-color: rgba(26,91,255,.22);
}

/* --- 图标容器 --- */
.product-thumb { border-radius: 22px; box-shadow: inset 0 0 0 1px rgba(16,24,40,.05); }
.solution-icon { box-shadow: inset 0 0 0 1px rgba(26,91,255,.1), 0 8px 18px rgba(26,91,255,.1); }
.case-icon { box-shadow: inset 0 0 0 1px rgba(16,24,40,.05); }
.about-card-icon { filter: drop-shadow(0 6px 14px rgba(16,24,40,.12)); }

/* --- 标签与文字细节 --- */
.product-tags li { background: #f8fafc; border-color: var(--hairline); }
.case-tag { letter-spacing: .5px; box-shadow: inset 0 0 0 1px rgba(26,91,255,.12); }
.news-date { box-shadow: inset 0 0 0 1px rgba(26,91,255,.1); }
.news-link { display: inline-block; transition: transform .3s var(--ease); }
.news-card:hover .news-link { transform: translateX(4px); }

/* --- 平台实拍图 / 功能卡 --- */
.platform-shot { position: relative; }
.platform-shot::before {
  content: ""; position: absolute; left: 8%; right: 8%; bottom: -34px; height: 120px; z-index: -1;
  background: radial-gradient(60% 100% at 50% 50%, rgba(26,91,255,.22), transparent 70%);
  filter: blur(28px); pointer-events: none;
}
.platform-shot-img { transition: transform .6s var(--ease), box-shadow .6s var(--ease); }
.platform-shot:hover .platform-shot-img {
  transform: translateY(-4px);
  box-shadow: 0 4px 10px rgba(4,16,40,.07), 0 26px 56px rgba(4,16,40,.18), 0 60px 130px rgba(4,16,40,.26);
}
.feature { backdrop-filter: blur(4px); }

/* --- 私有化部署：玻璃卡质感 --- */
.deploy-point, .deploy-mode {
  backdrop-filter: blur(10px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.12), 0 18px 40px rgba(3,12,34,.28);
}
.deploy-mode-hot { box-shadow: inset 0 1px 0 rgba(255,255,255,.18), 0 22px 54px rgba(26,91,255,.32); }
.flow-step { backdrop-filter: blur(8px); transition: transform .45s var(--ease), border-color .35s var(--ease-soft); }
.flow-step:hover { transform: translateY(-4px); border-color: rgba(110,168,255,.5); }

/* --- 页脚：顶部渐变细线 --- */
.site-footer { position: relative; background: linear-gradient(180deg, #071634 0%, #050f28 100%); }
.site-footer::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34,211,238,.45), rgba(26,91,255,.45), transparent);
}

/* --- 错落入场节奏 --- */
.reveal { transition: opacity .85s var(--ease), transform .85s var(--ease); }
.product-grid .reveal:nth-child(3n+2), .solution-grid .reveal:nth-child(4n+2) { transition-delay: .07s; }
.product-grid .reveal:nth-child(3n), .solution-grid .reveal:nth-child(4n+3) { transition-delay: .14s; }
.solution-grid .reveal:nth-child(4n) { transition-delay: .21s; }

/* --- 无障碍：尊重减弱动效偏好 --- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  /* 跑马灯改为可手动横向滚动 */
  .case-marquee { overflow-x: auto; -webkit-mask-image: none; mask-image: none; }
  .case-track { animation: none; }
}

/* --- 升级层的响应式微调 --- */
@media (max-width: 768px) {
  .section { padding: 76px 0; }
  .section-head { margin-bottom: 42px; }
  .section-head h2::after { width: 42px; margin-top: 18px; }
}