/* ============================================================
   京楚印象官网 · 深色科技风
   ============================================================ */
:root {
  --bg-0: #04070d;
  --bg-1: #070c16;
  --bg-2: #0a1120;
  --panel: rgba(146, 180, 255, 0.05);
  --panel-strong: rgba(146, 180, 255, 0.09);
  --line: rgba(146, 180, 255, 0.14);
  --text: #eaf0fa;
  --muted: #93a1b8;
  --cyan: #35e2c2;
  --blue: #5b8cff;
  --violet: #b07bff;
  --grad: linear-gradient(100deg, var(--cyan), var(--blue) 52%, var(--violet));
  --radius: 16px;
  --nav-h: 68px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 12px); }

body {
  font-family: var(--font);
  background: var(--bg-0);
  color: var(--text);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
b { font-weight: 700; }

.container { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.on { opacity: 1; transform: none; }

/* ============================================================
   导航
   ============================================================ */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(5, 9, 17, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}
.nav-inner {
  width: min(1240px, calc(100% - 48px));
  margin: 0 auto; height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark {
  width: 40px; height: 40px; border-radius: 11px;
  display: grid; place-items: center;
  font-size: 20px; font-weight: 800; color: #04121a;
  background: var(--grad);
  box-shadow: 0 4px 18px rgba(53, 226, 194, 0.35);
}
.brand-text { font-size: 19px; font-weight: 800; letter-spacing: 2px; line-height: 1.15; }
.brand-text small { display: block; font-size: 10px; font-weight: 500; letter-spacing: 1.6px; color: var(--muted); }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 8px 14px; border-radius: 10px;
  font-size: 15px; color: var(--muted);
  transition: color 0.25s, background 0.25s;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--text); background: var(--panel-strong); }
.nav-links a.active { color: var(--text); }
.nav-links a.nav-cta {
  margin-left: 10px; padding: 9px 20px;
  color: #04121a; font-weight: 700;
  background: var(--grad); border-radius: 999px;
  box-shadow: 0 4px 18px rgba(53, 226, 194, 0.3);
}
.nav-links a.nav-cta:hover { filter: brightness(1.1); }

.nav-burger { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-burger span { display: block; width: 24px; height: 2px; margin: 5px 0; background: var(--text); border-radius: 2px; transition: 0.3s; }
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   首屏
   ============================================================ */
.hero {
  position: relative; min-height: 100svh;
  display: flex; align-items: center; justify-content: center;
  padding: calc(var(--nav-h) + 48px) 24px 90px;
  background:
    radial-gradient(1000px 520px at 82% -10%, rgba(176, 123, 255, 0.16), transparent 62%),
    radial-gradient(900px 520px at 8% 110%, rgba(53, 226, 194, 0.13), transparent 60%),
    linear-gradient(180deg, var(--bg-1), var(--bg-0) 70%);
  overflow: hidden;
}
#starfield { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-glow { position: absolute; border-radius: 50%; filter: blur(90px); pointer-events: none; }
.hero-glow-a { width: 480px; height: 480px; left: -140px; top: 12%; background: rgba(53, 226, 194, 0.12); animation: drift 14s ease-in-out infinite alternate; }
.hero-glow-b { width: 560px; height: 560px; right: -160px; bottom: -10%; background: rgba(176, 123, 255, 0.14); animation: drift 18s ease-in-out infinite alternate-reverse; }
@keyframes drift { from { transform: translate(0, 0); } to { transform: translate(40px, -36px); } }

.hero-inner { position: relative; z-index: 2; max-width: 980px; text-align: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 8px 18px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--panel);
  font-size: 13.5px; color: var(--muted); letter-spacing: 1px;
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); animation: pulse 2.2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

.hero-company { margin-top: 26px; font-size: 16px; letter-spacing: 6px; color: var(--muted); }
.hero-title { margin-top: 12px; font-size: clamp(34px, 6vw, 62px); font-weight: 800; line-height: 1.28; letter-spacing: 2px; }
.hero-desc { margin: 22px auto 0; max-width: 680px; font-size: 16.5px; color: var(--muted); }

.hero-actions { margin-top: 36px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 34px; border-radius: 999px;
  font-size: 16px; font-weight: 700; letter-spacing: 1px;
  transition: transform 0.25s, filter 0.25s, background 0.25s, border-color 0.25s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #04121a; background: var(--grad); box-shadow: 0 8px 28px rgba(53, 226, 194, 0.32); }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { border: 1px solid var(--line); background: var(--panel); color: var(--text); }
.btn-ghost:hover { border-color: rgba(53, 226, 194, 0.5); background: var(--panel-strong); }

.hero-cards { margin-top: 58px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; text-align: left; }
.hero-card {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 18px 20px; border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(146, 180, 255, 0.08), rgba(146, 180, 255, 0.02));
  backdrop-filter: blur(6px);
  transition: transform 0.3s, border-color 0.3s;
}
.hero-card:hover { transform: translateY(-4px); border-color: rgba(53, 226, 194, 0.45); }
.hero-card-icon {
  flex-shrink: 0; width: 40px; height: 40px; border-radius: 11px;
  display: grid; place-items: center;
  background: rgba(53, 226, 194, 0.12); border: 1px solid rgba(53, 226, 194, 0.3);
}
.hero-card-icon svg { width: 20px; height: 20px; fill: var(--cyan); }
.hero-card b { display: block; font-size: 15.5px; margin-bottom: 2px; }
.hero-card span { font-size: 13px; color: var(--muted); line-height: 1.6; display: block; }

.hero-scroll {
  position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%); z-index: 2;
  width: 26px; height: 42px; border: 2px solid rgba(147, 161, 184, 0.55); border-radius: 14px;
}
.hero-scroll span {
  position: absolute; left: 50%; top: 8px; transform: translateX(-50%);
  width: 4px; height: 8px; border-radius: 2px; background: var(--cyan);
  animation: scrollHint 1.8s infinite;
}
@keyframes scrollHint { 0% { opacity: 1; top: 8px; } 70% { opacity: 0; top: 22px; } 100% { opacity: 0; top: 8px; } }

/* ============================================================
   数据条
   ============================================================ */
.stats { padding: 30px 0; border-block: 1px solid var(--line); background: var(--bg-1); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat { text-align: center; padding: 18px 8px; }
.stat-num { font-size: clamp(30px, 3.6vw, 44px); font-weight: 800; letter-spacing: 1px; }
.stat-num span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-num i { font-style: normal; font-size: 0.48em; margin-left: 4px; color: var(--cyan); }
.stat p { margin-top: 4px; font-size: 14px; color: var(--muted); }

/* ============================================================
   通用 section
   ============================================================ */
.section { padding: 104px 0; }
.section-alt {
  background:
    radial-gradient(800px 400px at 90% 0%, rgba(176, 123, 255, 0.07), transparent 60%),
    var(--bg-1);
  border-block: 1px solid rgba(146, 180, 255, 0.07);
}
.section-head { max-width: 780px; margin-bottom: 56px; }
.section-label {
  display: inline-block; margin-bottom: 14px;
  font-size: 13px; letter-spacing: 3px; color: var(--cyan);
  padding: 5px 14px; border: 1px solid rgba(53, 226, 194, 0.35); border-radius: 999px;
  background: rgba(53, 226, 194, 0.07);
}
.section-head h2 { font-size: clamp(27px, 3.6vw, 40px); font-weight: 800; letter-spacing: 1.5px; line-height: 1.35; }
.section-desc { margin-top: 16px; color: var(--muted); font-size: 15.5px; }

/* ============================================================
   关于我们
   ============================================================ */
.about-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 26px; align-items: stretch; }
.about-main {
  padding: 34px; border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(165deg, rgba(53, 226, 194, 0.07), rgba(146, 180, 255, 0.03));
}
.about-main h3 { font-size: 21px; margin-bottom: 14px; letter-spacing: 1px; }
.about-main > p { color: var(--muted); font-size: 15.5px; }
.about-note {
  margin-top: 26px; padding: 20px 22px; border-radius: 12px;
  border: 1px solid rgba(53, 226, 194, 0.25);
  background: rgba(53, 226, 194, 0.06);
}
.about-note b { color: var(--cyan); font-size: 15.5px; }
.about-note p { margin-top: 6px; font-size: 14px; color: var(--muted); }

.about-mv { display: grid; gap: 26px; }
.mv-card {
  padding: 26px 28px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--panel);
  transition: transform 0.3s, border-color 0.3s;
}
.mv-card:hover { transform: translateY(-4px); border-color: rgba(176, 123, 255, 0.45); }
.mv-icon {
  width: 42px; height: 42px; border-radius: 12px; margin-bottom: 14px;
  display: grid; place-items: center;
  background: rgba(176, 123, 255, 0.13); border: 1px solid rgba(176, 123, 255, 0.32);
}
.mv-icon svg { width: 21px; height: 21px; fill: var(--violet); }
.mv-card b { font-size: 17px; }
.mv-card p { margin-top: 8px; font-size: 14px; color: var(--muted); }

.timeline { margin-top: 26px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.tl-item {
  position: relative; padding: 28px 26px 26px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--panel);
  overflow: hidden; transition: transform 0.3s, border-color 0.3s;
}
.tl-item::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 3px;
  background: var(--grad);
}
.tl-item:hover { transform: translateY(-4px); border-color: rgba(53, 226, 194, 0.4); }
.tl-year {
  font-size: 34px; font-weight: 800;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.tl-item b { display: block; margin: 6px 0 8px; font-size: 17px; }
.tl-item p { font-size: 14px; color: var(--muted); }

/* ============================================================
   核心业务
   ============================================================ */
.biz-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.biz-card {
  position: relative; padding: 32px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--panel);
  transition: transform 0.3s, border-color 0.3s, background 0.3s;
}
.biz-card:hover { transform: translateY(-5px); border-color: rgba(53, 226, 194, 0.45); background: var(--panel-strong); }
.biz-tag {
  position: absolute; top: 24px; right: 24px;
  font-size: 12px; letter-spacing: 2px; color: #04121a; font-weight: 700;
  padding: 4px 12px; border-radius: 999px; background: var(--grad);
}
.biz-icon {
  width: 50px; height: 50px; border-radius: 14px; margin-bottom: 18px;
  display: grid; place-items: center;
  background: rgba(91, 140, 255, 0.13); border: 1px solid rgba(91, 140, 255, 0.35);
}
.biz-icon svg { width: 25px; height: 25px; fill: var(--blue); }
.biz-card h3 { font-size: 20px; margin-bottom: 10px; letter-spacing: 1px; }
.biz-card p { font-size: 14.5px; color: var(--muted); }
.biz-card p b { color: var(--cyan); }

.ad-card {
  margin-top: 26px; padding: 34px; border-radius: var(--radius);
  border: 1px solid rgba(176, 123, 255, 0.3);
  background: linear-gradient(150deg, rgba(176, 123, 255, 0.1), rgba(91, 140, 255, 0.04));
}
.ad-head h3 { font-size: 21px; letter-spacing: 1px; }
.ad-head p { margin-top: 6px; font-size: 14.5px; color: var(--muted); }
.ad-list { margin-top: 22px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.ad-item {
  padding: 20px 22px; border-radius: 12px;
  border: 1px solid var(--line); background: rgba(4, 7, 13, 0.45);
  transition: border-color 0.3s, transform 0.3s;
}
.ad-item:hover { border-color: rgba(176, 123, 255, 0.5); transform: translateY(-3px); }
.ad-item b { font-size: 16px; color: var(--violet); }
.ad-item p { margin-top: 6px; font-size: 13.5px; color: var(--muted); }

/* ============================================================
   工业化流水线
   ============================================================ */
.pipe-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.pipe-step {
  position: relative; padding: 26px 22px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--panel);
  transition: transform 0.3s, border-color 0.3s;
}
.pipe-step:hover { transform: translateY(-5px); border-color: rgba(53, 226, 194, 0.45); }
.pipe-step:not(:last-child)::after {
  content: ""; position: absolute; top: 50%; right: -15px;
  width: 12px; height: 12px;
  border-top: 2px solid var(--cyan); border-right: 2px solid var(--cyan);
  transform: translateY(-50%) rotate(45deg); opacity: 0.7;
}
.pipe-no {
  font-size: 30px; font-weight: 800;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.pipe-step b { display: block; margin: 10px 0 8px; font-size: 16px; }
.pipe-step p { font-size: 13px; color: var(--muted); }

/* ============================================================
   爆款案例
   ============================================================ */
.case-featured {
  display: grid; grid-template-columns: 340px 1fr; gap: 40px; align-items: center;
  padding: 36px; border-radius: 20px;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(53, 226, 194, 0.08), rgba(176, 123, 255, 0.05));
  box-shadow: var(--shadow);
}
.case-poster { border-radius: 14px; overflow: hidden; box-shadow: 0 16px 44px rgba(0, 0, 0, 0.5); }
.case-poster img { width: 100%; transition: transform 0.5s ease; }
.case-featured:hover .case-poster img { transform: scale(1.04); }
.case-badge {
  display: inline-block; padding: 6px 16px; border-radius: 999px;
  font-size: 13px; font-weight: 700; letter-spacing: 1px; color: #04121a;
  background: var(--grad);
}
.case-info h3 { margin-top: 16px; font-size: clamp(23px, 2.6vw, 32px); letter-spacing: 1px; }
.case-stats { margin-top: 22px; display: grid; grid-template-columns: repeat(3, auto); gap: 14px 40px; justify-content: start; }
.case-stats b {
  font-size: clamp(24px, 2.4vw, 32px); font-weight: 800;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.case-stats span { display: block; margin-top: 2px; font-size: 13px; color: var(--muted); }
.case-platforms { margin-top: 20px; font-size: 14.5px; }
.case-platforms span {
  margin-right: 12px; padding: 3px 12px; border-radius: 999px;
  font-size: 12.5px; color: var(--cyan);
  border: 1px solid rgba(53, 226, 194, 0.4); background: rgba(53, 226, 194, 0.08);
}
.case-note { margin-top: 14px; font-size: 14px; color: var(--muted); }

.case-gallery { margin-top: 26px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.case-item {
  border-radius: 14px; overflow: hidden;
  border: 1px solid var(--line); background: var(--panel);
  transition: transform 0.3s, border-color 0.3s;
}
.case-item:hover { transform: translateY(-6px); border-color: rgba(53, 226, 194, 0.45); }
.case-item img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; object-position: top; }
.case-item figcaption { padding: 14px 16px 16px; }
.case-item figcaption b { display: block; font-size: 14.5px; line-height: 1.5; }
.case-item figcaption span { font-size: 12.5px; color: var(--muted); }

.case-proof {
  margin-top: 26px; padding: 34px; border-radius: 20px;
  border: 1px solid var(--line); background: var(--panel);
  display: grid; grid-template-columns: 1fr 340px; gap: 36px; align-items: center;
}
.proof-text h3 { font-size: 22px; letter-spacing: 1px; }
.proof-text ul { margin-top: 16px; list-style: none; display: grid; gap: 12px; }
.proof-text li { position: relative; padding-left: 22px; font-size: 15px; color: var(--muted); }
.proof-text li::before {
  content: ""; position: absolute; left: 0; top: 0.62em;
  width: 9px; height: 9px; border-radius: 3px; background: var(--grad);
}
.proof-text li b { color: var(--text); }
.proof-tip { margin-top: 18px; font-size: 12.5px; color: var(--muted); opacity: 0.75; }
.proof-shots { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.proof-shots img {
  width: 100%; border-radius: 12px;
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}

/* ============================================================
   团队优势
   ============================================================ */
.team-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 22px; }
.team-card {
  grid-column: span 2;
  padding: 28px 26px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--panel);
  transition: transform 0.3s, border-color 0.3s;
}
.team-card:hover { transform: translateY(-5px); border-color: rgba(176, 123, 255, 0.45); }
.team-card-big { grid-column: span 3; background: linear-gradient(160deg, rgba(53, 226, 194, 0.09), rgba(146, 180, 255, 0.03)); }
.team-num {
  font-size: 46px; font-weight: 800; line-height: 1.2;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.team-num i { font-style: normal; font-size: 0.42em; }
.team-card b { display: block; margin-top: 8px; font-size: 17px; }
.team-card p { margin-top: 8px; font-size: 14px; color: var(--muted); }

/* ============================================================
   产学研
   ============================================================ */
.edu-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 40px; align-items: start; }
.edu-photos { position: relative; }
.edu-photo-main { border-radius: 16px; border: 1px solid var(--line); box-shadow: var(--shadow); }
.edu-photo-sub {
  position: absolute; right: -18px; bottom: 52px; width: 46%;
  border-radius: 12px; border: 3px solid var(--bg-1);
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.55);
}
.edu-caption { margin-top: 18px; font-size: 13px; color: var(--muted); }
.edu-text > p { font-size: 15.5px; color: var(--muted); }
.edu-schools { margin-top: 24px; }
.edu-schools b { font-size: 16px; color: var(--cyan); }
.school-chips { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 10px; }
.school-chips span {
  padding: 9px 18px; border-radius: 999px; font-size: 14px;
  border: 1px solid var(--line); background: var(--panel);
  transition: border-color 0.3s, background 0.3s;
}
.school-chips span:hover { border-color: rgba(53, 226, 194, 0.5); background: rgba(53, 226, 194, 0.08); }
.edu-benefits { margin-top: 24px; display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.edu-benefit {
  padding: 20px 22px; border-radius: 12px;
  border: 1px solid var(--line); background: var(--panel);
}
.edu-benefit .mv-icon { margin-bottom: 10px; width: 38px; height: 38px; }
.edu-benefit b { font-size: 15.5px; }
.edu-benefit p { margin-top: 6px; font-size: 13.5px; color: var(--muted); }

/* ============================================================
   市场前景
   ============================================================ */
.market-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.market-card {
  padding: 30px 28px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--panel);
  transition: transform 0.3s, border-color 0.3s;
}
.market-card:hover { transform: translateY(-5px); border-color: rgba(91, 140, 255, 0.5); }
.market-no {
  font-size: 15px; font-weight: 800; letter-spacing: 2px; color: var(--blue);
  padding-bottom: 12px; margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.market-card b { font-size: 17.5px; }
.market-card p { margin-top: 10px; font-size: 14px; color: var(--muted); }
.market-insight {
  margin-top: 26px; padding: 22px 30px; border-radius: 14px;
  text-align: center; font-size: 15.5px; letter-spacing: 0.5px;
  border: 1px solid rgba(53, 226, 194, 0.3);
  background: linear-gradient(90deg, rgba(53, 226, 194, 0.09), rgba(176, 123, 255, 0.09));
}

/* ============================================================
   合作生态
   ============================================================ */
.eco-rows { display: grid; gap: 20px; }
.eco-row {
  display: grid; grid-template-columns: 300px 1fr; gap: 26px; align-items: center;
  padding: 26px 30px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--panel);
  transition: border-color 0.3s;
}
.eco-row:hover { border-color: rgba(53, 226, 194, 0.4); }
.eco-row-head b { font-size: 18px; color: var(--cyan); }
.eco-row-head span { display: block; margin-top: 4px; font-size: 13px; color: var(--muted); }
.eco-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.eco-tags span {
  padding: 8px 18px; border-radius: 999px; font-size: 14px;
  border: 1px solid var(--line); background: rgba(4, 7, 13, 0.4);
  transition: border-color 0.25s, color 0.25s, background 0.25s;
}
.eco-tags span:hover { border-color: rgba(176, 123, 255, 0.55); color: var(--violet); background: rgba(176, 123, 255, 0.07); }

.eco-flow { margin-top: 34px; display: flex; align-items: stretch; gap: 14px; }
.eco-flow-item {
  flex: 1; text-align: center; padding: 22px 14px; border-radius: 14px;
  border: 1px solid rgba(53, 226, 194, 0.28);
  background: linear-gradient(165deg, rgba(53, 226, 194, 0.09), rgba(91, 140, 255, 0.04));
}
.eco-flow-item b { display: block; font-size: 17px; letter-spacing: 1px; }
.eco-flow-item span { display: block; margin-top: 5px; font-size: 12.5px; color: var(--muted); }
.eco-flow-arrow { align-self: center; flex-shrink: 0; width: 14px; height: 14px; border-top: 2px solid var(--cyan); border-right: 2px solid var(--cyan); transform: rotate(45deg); opacity: 0.75; }

/* ============================================================
   联系我们 + 页脚
   ============================================================ */
.contact {
  padding: 110px 0 0;
  background:
    radial-gradient(900px 480px at 50% -10%, rgba(176, 123, 255, 0.13), transparent 62%),
    var(--bg-1);
  border-top: 1px solid rgba(146, 180, 255, 0.07);
}
.contact-cta { text-align: center; max-width: 720px; margin: 0 auto; }
.contact-cta h2 { font-size: clamp(30px, 4.4vw, 48px); font-weight: 800; letter-spacing: 3px; }
.contact-cta p { margin-top: 18px; color: var(--muted); font-size: 16px; }
.contact-grid { margin-top: 54px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.contact-card {
  padding: 30px 28px; border-radius: var(--radius); text-align: center;
  border: 1px solid var(--line); background: var(--panel);
  transition: transform 0.3s, border-color 0.3s;
}
.contact-card:hover { transform: translateY(-4px); border-color: rgba(53, 226, 194, 0.45); }
.contact-card .mv-icon { margin: 0 auto 14px; }
.contact-card b { font-size: 17px; }
.contact-card p { margin-top: 8px; font-size: 14.5px; color: var(--muted); }
.contact-card em { font-style: normal; color: var(--cyan); }

.footer { margin-top: 84px; padding: 26px 0; border-top: 1px solid var(--line); background: rgba(4, 7, 13, 0.6); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap; }
.footer p { font-size: 13.5px; color: var(--muted); }
.footer-icp { opacity: 0.7; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .biz-grid, .about-grid { grid-template-columns: 1fr; }
  .pipe-grid { grid-template-columns: repeat(3, 1fr); }
  .pipe-step:nth-child(3)::after { display: none; }
  .case-featured { grid-template-columns: 280px 1fr; gap: 28px; }
  .case-gallery { grid-template-columns: repeat(2, 1fr); }
  .case-proof { grid-template-columns: 1fr; }
  .proof-shots { max-width: 480px; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .team-card, .team-card-big { grid-column: span 1; }
  .edu-grid { grid-template-columns: 1fr; }
  .edu-photo-sub { right: 10px; }
  .market-grid { grid-template-columns: 1fr; }
  .eco-row { grid-template-columns: 1fr; gap: 14px; }
  .eco-flow { flex-direction: column; }
  .eco-flow-arrow { transform: rotate(135deg); margin: 2px auto; }
}

@media (max-width: 720px) {
  :root { --nav-h: 60px; }
  .nav-links {
    position: fixed; inset: var(--nav-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 4px;
    padding: 16px 22px 22px;
    background: rgba(5, 9, 17, 0.97); backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-130%); transition: transform 0.35s ease;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: 12px 14px; font-size: 16px; }
  .nav-links a.nav-cta { margin: 10px 0 0; text-align: center; }
  .nav-burger { display: block; }

  .hero { padding-bottom: 70px; }
  .hero-cards { grid-template-columns: 1fr; margin-top: 40px; }
  .hero-company { letter-spacing: 3px; font-size: 14px; }
  .section { padding: 72px 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 4px; }
  .pipe-grid { grid-template-columns: 1fr; }
  .pipe-step::after { display: none !important; }
  .case-featured { grid-template-columns: 1fr; padding: 24px; }
  .case-poster { max-width: 320px; margin: 0 auto; }
  .case-gallery { grid-template-columns: 1fr 1fr; gap: 14px; }
  .case-stats { grid-template-columns: 1fr 1fr; }
  .ad-list { grid-template-columns: 1fr; }
  .edu-benefits { grid-template-columns: 1fr; }
  .edu-photo-sub { width: 42%; bottom: 40px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { justify-content: center; text-align: center; }
}