/* ============================================================
   MiPlus 米加科技 · site-v2 设计系统
   主题：深空蓝科技风（Space Blue Tech）
   ============================================================ */

:root {
  /* 品牌色：时尚科技蓝 */
  --brand-50:  #eef6ff;
  --brand-100: #d9ebff;
  --brand-200: #b3d7ff;
  --brand-300: #84bdff;
  --brand-400: #529dff;
  --brand-500: #2e7fff;
  --brand-600: #1663f5;   /* 主品牌色 */
  --brand-700: #0f4fd0;
  --brand-800: #1242a6;
  --brand-900: #143b82;

  /* 深空背景 */
  --ink-950: #04070f;
  --ink-900: #070c1a;
  --ink-850: #0a1122;
  --ink-800: #0d1530;
  --ink-700: #132040;

  /* 辅助 */
  --cyan-400: #38e1ff;
  --cyan-500: #22d3ee;
  --violet-500: #7c6cff;

  /* 中性 */
  --gray-100: #f1f5fb;
  --gray-200: #dbe4f0;
  --gray-300: #b7c5d9;
  --gray-400: #8fa2bd;
  --gray-500: #6c819f;
  --gray-600: #4d6079;

  --bg: var(--ink-950);
  --bg-soft: var(--ink-900);
  --surface: rgba(255, 255, 255, 0.04);
  --surface-strong: rgba(255, 255, 255, 0.07);
  --stroke: rgba(255, 255, 255, 0.09);
  --stroke-strong: rgba(255, 255, 255, 0.16);

  --text-1: #eef4ff;
  --text-2: #b9c8e0;
  --text-3: #8296b5;

  --gradient-brand: linear-gradient(135deg, #1663f5 0%, #38e1ff 100%);
  --gradient-text: linear-gradient(120deg, #5aa2ff 0%, #38e1ff 55%, #8be9ff 100%);
  --gradient-hero: radial-gradient(60% 80% at 70% 10%, rgba(22, 99, 245, 0.35) 0%, transparent 60%),
                   radial-gradient(50% 60% at 15% 30%, rgba(56, 225, 255, 0.16) 0%, transparent 60%);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --shadow-card: 0 8px 30px rgba(2, 8, 23, 0.45);
  --shadow-glow: 0 0 0 1px rgba(56, 225, 255, 0.25), 0 10px 40px rgba(22, 99, 245, 0.35);

  --font-sans: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;

  --nav-h: 72px;
  --container: 1200px;
}

/* ============ Reset & Base ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-1);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img, svg, video, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
::selection { background: rgba(22, 99, 245, 0.5); color: #fff; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--ink-900); }
::-webkit-scrollbar-thumb { background: #1d2c4d; border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: var(--brand-600); }

.container { width: min(100% - 48px, var(--container)); margin-inline: auto; }

.section { position: relative; padding: clamp(72px, 10vw, 128px) 0; }

.section-head { max-width: 760px; margin: 0 auto clamp(40px, 6vw, 72px); text-align: center; }
.section-head .eyebrow { justify-content: center; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  border: 1px solid var(--stroke-strong);
  background: rgba(22, 99, 245, 0.12);
  color: #9ecbff; font-size: 13px; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan-400); box-shadow: 0 0 10px var(--cyan-400); }

h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; letter-spacing: -0.01em; }
.h-display { font-size: clamp(2.2rem, 5.4vw, 4rem); font-weight: 800; }
.h-1 { font-size: clamp(1.8rem, 3.6vw, 2.75rem); }
.h-2 { font-size: clamp(1.4rem, 2.6vw, 2rem); }
.lead { font-size: clamp(1.02rem, 1.4vw, 1.2rem); color: var(--text-2); }

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

.mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; } .mt-40 { margin-top: 40px; }

/* ============ 按钮 ============ */
.btn {
  --btn-bg: var(--gradient-brand);
  position: relative; display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 28px; border-radius: 999px;
  font-weight: 600; font-size: 15px; white-space: nowrap;
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.25s, background 0.25s, border-color 0.25s;
  isolation: isolate;
}
.btn-primary { background: var(--btn-bg); color: #fff; box-shadow: 0 8px 24px rgba(22, 99, 245, 0.4); }
.btn-primary::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; z-index: -1;
  background: linear-gradient(135deg, #2e7fff, #5be7ff);
  opacity: 0; transition: opacity 0.25s;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(22, 99, 245, 0.55); }
.btn-primary:hover::after { opacity: 1; }
.btn-ghost { border: 1px solid var(--stroke-strong); color: var(--text-1); background: rgba(255, 255, 255, 0.03); backdrop-filter: blur(8px); }
.btn-ghost:hover { border-color: rgba(56, 225, 255, 0.5); background: rgba(56, 225, 255, 0.08); transform: translateY(-2px); }
.btn .arr { transition: transform 0.25s; }
.btn:hover .arr { transform: translateX(4px); }

/* ============ 导航 ============ */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100; height: var(--nav-h);
  display: flex; align-items: center;
  transition: background 0.35s, border-color 0.35s, backdrop-filter 0.35s, box-shadow 0.35s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(6, 10, 24, 0.78);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom-color: var(--stroke);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
}
.nav-inner { display: flex; align-items: center; gap: 32px; width: min(100% - 48px, 1320px); margin-inline: auto; }

.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; font-size: 19px; letter-spacing: 0.02em; }
.brand-mark {
  width: 40px; height: 40px; border-radius: 12px; flex: none;
  overflow: hidden; display: block;
  box-shadow: 0 6px 18px rgba(22, 99, 245, 0.4);
}
.brand-mark img { width: 100%; height: 100%; object-fit: cover; }
/* 有底卡片式 logo（a-card 自带浅色底）无需 overflow 圆角裁切 */
.brand-mark.raw { overflow: visible; border-radius: 0; box-shadow: none; }
.brand-mark.raw img { border-radius: 12px; }
.brand small { display: block; font-size: 10.5px; font-weight: 500; color: var(--text-3); letter-spacing: 0.18em; }

.nav-links { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.nav-links a {
  position: relative; padding: 9px 15px; border-radius: 10px;
  color: var(--text-2); font-size: 15px; font-weight: 500;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: #fff; background: rgba(255, 255, 255, 0.06); }
.nav-links a.active { color: #fff; }
.nav-links a.active::after {
  content: ""; position: absolute; left: 15px; right: 15px; bottom: 3px; height: 2px; border-radius: 2px;
  background: var(--gradient-brand);
}
.nav-cta { margin-left: 8px; padding: 10px 20px; font-size: 14px; }

.nav-toggle { display: none; width: 44px; height: 44px; border-radius: 12px; border: 1px solid var(--stroke-strong); margin-left: auto; position: relative; }
.nav-toggle span { position: absolute; left: 11px; right: 11px; height: 2px; background: #fff; border-radius: 2px; transition: transform 0.3s, opacity 0.3s, top 0.3s; }
.nav-toggle span:nth-child(1) { top: 15px; }
.nav-toggle span:nth-child(2) { top: 21px; }
.nav-toggle span:nth-child(3) { top: 27px; }
.nav-toggle.open span:nth-child(1) { top: 21px; transform: rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { top: 21px; transform: rotate(-45deg); }

.nav-drawer {
  position: fixed; inset: var(--nav-h) 0 auto 0; z-index: 99;
  background: rgba(5, 8, 18, 0.96); backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--stroke);
  padding: 18px 24px 28px;
  display: none; flex-direction: column; gap: 4px;
  transform: translateY(-8px); opacity: 0; pointer-events: none;
  transition: transform 0.3s, opacity 0.3s;
}
.nav-drawer.open { transform: none; opacity: 1; pointer-events: auto; }
.nav-drawer a { padding: 14px 12px; border-radius: 12px; font-size: 16px; font-weight: 500; color: var(--text-2); border-bottom: 1px solid rgba(255,255,255,0.04); }
.nav-drawer a:hover { color: #fff; background: rgba(255,255,255,0.05); }
.nav-drawer .btn { margin-top: 14px; justify-content: center; }

/* ============ Hero ============ */
.hero {
  position: relative; min-height: 100svh;
  display: flex; align-items: center;
  padding: calc(var(--nav-h) + 48px) 0 80px;
  background: var(--gradient-hero);
  overflow: hidden;
}
.hero-canvas { position: absolute; inset: 0; z-index: 0; opacity: 0.9; }
.hero-grid-bg {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(90, 162, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(90, 162, 255, 0.055) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(70% 60% at 50% 35%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(70% 60% at 50% 35%, #000 30%, transparent 100%);
}
.hero .container { position: relative; z-index: 2; }
.hero-badge { margin-bottom: 26px; animation: heroUp 0.8s 0.05s cubic-bezier(0.22,1,0.36,1) both; }
.hero h1 { max-width: 20ch; animation: heroUp 0.8s 0.15s cubic-bezier(0.22,1,0.36,1) both; }
.hero .lead { max-width: 620px; margin-top: 24px; animation: heroUp 0.8s 0.25s cubic-bezier(0.22,1,0.36,1) both; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 40px; animation: heroUp 0.8s 0.35s cubic-bezier(0.22,1,0.36,1) both; }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  margin-top: clamp(48px, 7vw, 80px);
  background: var(--stroke); border: 1px solid var(--stroke); border-radius: var(--radius-lg);
  overflow: hidden; animation: heroUp 0.8s 0.45s cubic-bezier(0.22,1,0.36,1) both;
  backdrop-filter: blur(10px);
}
.stat { background: rgba(8, 13, 28, 0.72); padding: 26px 24px; }
.stat-num { font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight: 800; font-variant-numeric: tabular-nums; }
.stat-num em { font-style: normal; font-size: 0.55em; margin-left: 2px; color: var(--cyan-400); }
.stat-label { color: var(--text-3); font-size: 14px; margin-top: 4px; }

@keyframes heroUp { from { opacity: 0; transform: translateY(28px); } to { opacity: 1; transform: none; } }

.hero-orbit { position: absolute; z-index: 1; right: -140px; top: 50%; width: min(56vw, 720px); aspect-ratio: 1; transform: translateY(-50%); pointer-events: none; opacity: 0.75; }
.hero-orbit .ring { position: absolute; inset: 0; border-radius: 50%; border: 1px dashed rgba(90, 162, 255, 0.25); animation: spin 60s linear infinite; }
.hero-orbit .ring:nth-child(2) { inset: 14%; animation-duration: 45s; animation-direction: reverse; border-color: rgba(56, 225, 255, 0.2); }
.hero-orbit .ring:nth-child(3) { inset: 30%; animation-duration: 32s; }
.hero-orbit .core { position: absolute; inset: 42%; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #4f9dff, #0f4fd0 65%, #082a66); box-shadow: 0 0 90px rgba(22, 99, 245, 0.65), inset 0 0 40px rgba(139, 233, 255, 0.35); animation: pulse 5s ease-in-out infinite; }
.hero-orbit .sat { position: absolute; top: -5px; left: 50%; width: 10px; height: 10px; margin-left: -5px; border-radius: 50%; background: var(--cyan-400); box-shadow: 0 0 16px var(--cyan-400); }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.06); } }

/* ============ 跑马灯 ============ */
.marquee { --marquee-gap: 48px; border-block: 1px solid var(--stroke); background: rgba(255,255,255,0.02); padding: 20px 0; overflow: hidden; }
.marquee-track { display: flex; width: max-content; animation: marquee 72s linear infinite; will-change: transform; }
.marquee-group { display: flex; align-items: center; flex-shrink: 0; gap: var(--marquee-gap); padding-right: var(--marquee-gap); }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-item { display: flex; align-items: center; gap: 10px; color: var(--text-3); font-size: 15px; font-weight: 600; white-space: nowrap; }
.marquee-item i { width: 7px; height: 7px; border-radius: 50%; background: var(--brand-500); box-shadow: 0 0 10px rgba(46, 127, 255, 0.8); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ============ 卡片网格 ============ */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  position: relative; border-radius: var(--radius-lg);
  border: 1px solid var(--stroke);
  background: linear-gradient(180deg, var(--surface-strong), var(--surface));
  padding: 32px 28px;
  transition: transform 0.35s cubic-bezier(0.22,1,0.36,1), border-color 0.35s, box-shadow 0.35s;
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56, 225, 255, 0.6), transparent);
  opacity: 0; transition: opacity 0.35s;
}
.card:hover { transform: translateY(-6px); border-color: rgba(56, 225, 255, 0.35); box-shadow: var(--shadow-glow); }
.card:hover::before { opacity: 1; }
.card-icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: rgba(22, 99, 245, 0.15); border: 1px solid rgba(82, 157, 255, 0.3);
  color: #6db1ff; margin-bottom: 20px;
  transition: background 0.3s, color 0.3s, transform 0.3s;
}
.card:hover .card-icon { background: var(--gradient-brand); color: #fff; transform: scale(1.06) rotate(-4deg); }
.card h3 { font-size: 1.18rem; margin-bottom: 10px; }
.card p { color: var(--text-2); font-size: 0.95rem; }
.card .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tag { font-size: 12.5px; padding: 4px 11px; border-radius: 999px; border: 1px solid var(--stroke-strong); color: var(--text-3); background: rgba(255,255,255,0.03); }

/* ============ 特性展示（图文分栏） ============ */
.split { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(36px, 6vw, 88px); align-items: center; }
.split.reverse > .split-media { order: -1; }
.split h2 { margin: 18px 0 20px; }
.split p { color: var(--text-2); }
.check-list { display: grid; gap: 14px; margin-top: 28px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; color: var(--text-2); font-size: 0.98rem; }
.check-list li strong { color: var(--text-1); font-weight: 600; }
.check-list .ck {
  flex: none; width: 22px; height: 22px; margin-top: 3px; border-radius: 50%;
  background: rgba(56, 225, 255, 0.12); border: 1px solid rgba(56, 225, 255, 0.4);
  display: grid; place-items: center; color: var(--cyan-400); font-size: 12px;
}

.panel {
  border-radius: var(--radius-xl); border: 1px solid var(--stroke);
  background:
    radial-gradient(120% 120% at 80% 0%, rgba(22, 99, 245, 0.22) 0%, transparent 55%),
    linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  padding: clamp(24px, 3.5vw, 44px);
  box-shadow: var(--shadow-card);
  position: relative; overflow: hidden;
}
.panel-glow { position: absolute; width: 280px; height: 280px; border-radius: 50%; filter: blur(80px); background: rgba(56, 225, 255, 0.16); right: -90px; top: -90px; pointer-events: none; }

/* 模拟控制台 UI */
.console { border-radius: var(--radius-lg); border: 1px solid var(--stroke-strong); background: #070c1c; overflow: hidden; box-shadow: 0 24px 60px rgba(0,0,0,0.5); }
.console-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-bottom: 1px solid var(--stroke); background: rgba(255,255,255,0.03); }
.console-bar i { width: 11px; height: 11px; border-radius: 50%; }
.console-bar i:nth-child(1) { background: #ff5f57; } .console-bar i:nth-child(2) { background: #febc2e; } .console-bar i:nth-child(3) { background: #28c840; }
.console-bar span { margin-left: 8px; font-size: 12px; color: var(--text-3); font-family: ui-monospace, "Cascadia Code", Consolas, monospace; }
.console-body { padding: 20px; display: grid; gap: 14px; }
.chat-row { display: flex; gap: 10px; align-items: flex-end; }
.chat-row .avatar { flex: none; width: 32px; height: 32px; border-radius: 10px; background: var(--gradient-brand); display: grid; place-items: center; font-size: 13px; color: #fff; font-weight: 700; }
.chat-row.user { flex-direction: row-reverse; }
.chat-row.user .avatar { background: rgba(255,255,255,0.1); border: 1px solid var(--stroke-strong); color: var(--text-2); }
.bubble { max-width: 78%; padding: 11px 15px; border-radius: 14px 14px 14px 4px; background: rgba(22, 99, 245, 0.18); border: 1px solid rgba(82, 157, 255, 0.28); font-size: 13.5px; color: var(--text-1); }
.chat-row.user .bubble { border-radius: 14px 14px 4px 14px; background: rgba(255,255,255,0.06); border-color: var(--stroke-strong); color: var(--text-2); }
.typing { display: inline-flex; gap: 4px; padding: 14px 16px; }
.typing i { width: 6px; height: 6px; border-radius: 50%; background: #6db1ff; animation: blink 1.2s infinite; }
.typing i:nth-child(2) { animation-delay: 0.2s; } .typing i:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink { 0%, 60%, 100% { opacity: 0.25; transform: translateY(0); } 30% { opacity: 1; transform: translateY(-3px); } }

.kpi-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 4px; }
.kpi { border: 1px solid var(--stroke); border-radius: 12px; padding: 12px 14px; background: rgba(255,255,255,0.03); }
.kpi b { display: block; font-size: 1.15rem; color: #7fd4ff; font-variant-numeric: tabular-nums; }
.kpi span { font-size: 11.5px; color: var(--text-3); }

/* ============ 渠道九宫 / 徽章云 ============ */
.chips { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.chip {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 11px 18px; border-radius: 999px;
  border: 1px solid var(--stroke-strong); background: rgba(255,255,255,0.035);
  font-size: 14.5px; font-weight: 500; color: var(--text-2);
  transition: transform 0.25s, border-color 0.25s, color 0.25s, background 0.25s;
}
.chip svg { width: 17px; height: 17px; color: #6db1ff; }
.chip:hover { transform: translateY(-3px); border-color: rgba(56, 225, 255, 0.5); color: #fff; background: rgba(22, 99, 245, 0.14); }

/* ============ 解决方案 Tab ============ */
.tabs { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; }
.tab-btn {
  padding: 12px 24px; border-radius: 999px; border: 1px solid var(--stroke-strong);
  color: var(--text-2); font-weight: 600; font-size: 15px; background: rgba(255,255,255,0.03);
  transition: all 0.25s;
}
.tab-btn:hover { color: #fff; border-color: rgba(56,225,255,0.4); }
.tab-btn.active { background: var(--gradient-brand); border-color: transparent; color: #fff; box-shadow: 0 8px 22px rgba(22, 99, 245, 0.45); }
.tab-panel { display: none; animation: fadeSlide 0.45s cubic-bezier(0.22,1,0.36,1); }
.tab-panel.active { display: block; }
@keyframes fadeSlide { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; margin-top: 44px; }
.flow-step { position: relative; padding: 24px 20px; border-radius: var(--radius-md); border: 1px solid var(--stroke); background: rgba(255,255,255,0.03); counter-increment: step; }
.flow-step::before {
  content: "0" counter(step); display: block; font-size: 13px; font-weight: 800; letter-spacing: 0.1em;
  color: var(--cyan-400); margin-bottom: 10px; font-family: ui-monospace, monospace;
}
.flow-step h4 { font-size: 1.02rem; margin-bottom: 6px; }
.flow-step p { font-size: 0.88rem; color: var(--text-3); }
.flow-step:not(:last-child)::after {
  content: ""; position: absolute; top: 50%; right: -14px; width: 10px; height: 10px;
  border-top: 2px solid rgba(56,225,255,0.5); border-right: 2px solid rgba(56,225,255,0.5);
  transform: translateY(-50%) rotate(45deg);
}

/* ============ 合作伙伴 Logo 墙 ============ */
.logo-wall { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.logo-cell {
  height: 84px; border-radius: var(--radius-md); border: 1px solid var(--stroke);
  background: rgba(255,255,255,0.028); display: grid; place-items: center;
  color: var(--text-3); font-weight: 700; font-size: 15px; letter-spacing: 0.03em;
  transition: all 0.3s; text-align: center; padding: 0 12px;
}
.logo-cell:hover { border-color: rgba(56,225,255,0.4); color: #cfe6ff; background: rgba(22,99,245,0.1); transform: translateY(-3px); }

/* ============ CTA 横幅 ============ */
.cta-band { position: relative; border-radius: var(--radius-xl); overflow: hidden; padding: clamp(44px, 6vw, 80px) clamp(28px, 5vw, 72px); text-align: center; border: 1px solid rgba(82, 157, 255, 0.3);
  background: radial-gradient(90% 140% at 50% 0%, rgba(22, 99, 245, 0.4) 0%, rgba(7, 12, 26, 0.6) 65%); }
.cta-band::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(139, 233, 255, 0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(139, 233, 255, 0.06) 1px, transparent 1px); background-size: 40px 40px; mask-image: radial-gradient(60% 80% at 50% 0%, #000, transparent); -webkit-mask-image: radial-gradient(60% 80% at 50% 0%, #000, transparent); }
.cta-band > * { position: relative; }

/* ============ 页脚 ============ */
.footer { border-top: 1px solid var(--stroke); background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent); padding: 72px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 40px; }
.footer h5 { font-size: 15px; margin-bottom: 18px; color: #fff; }
.footer ul { display: grid; gap: 11px; }
.footer a, .footer li { color: var(--text-3); font-size: 14.5px; transition: color 0.2s; }
.footer a:hover { color: #7fd4ff; }
.footer-brand p { color: var(--text-3); font-size: 14px; margin-top: 16px; max-width: 34ch; }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; }
.footer-contact svg { flex: none; width: 16px; height: 16px; margin-top: 5px; color: #5aa2ff; }
.footer-bottom { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; align-items: center; margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--stroke); color: var(--gray-600); font-size: 13px; }

/* ============ 页面页头（子页） ============ */
.page-hero { position: relative; padding: calc(var(--nav-h) + clamp(56px, 8vw, 96px)) 0 clamp(48px, 7vw, 88px); background: var(--gradient-hero); overflow: hidden; }
.page-hero .crumb { display: flex; gap: 8px; align-items: center; color: var(--text-3); font-size: 13.5px; margin-bottom: 20px; }
.page-hero .crumb a:hover { color: #7fd4ff; }
.page-hero .lead { max-width: 680px; margin-top: 20px; }

/* ============ 入场动效 ============ */
[data-reveal] { opacity: 0; transform: translateY(34px); transition: opacity 0.7s cubic-bezier(0.22,1,0.36,1), transform 0.7s cubic-bezier(0.22,1,0.36,1); transition-delay: var(--d, 0s); will-change: opacity, transform; }
[data-reveal].in { opacity: 1; transform: none; }

/* ============ AI 助手浮窗 ============ */
.ai-fab {
  position: fixed; right: 24px; bottom: 24px; z-index: 120;
  width: 58px; height: 58px; border-radius: 50%;
  background: var(--gradient-brand);
  display: grid; place-items: center;
  box-shadow: 0 10px 30px rgba(22, 99, 245, 0.55);
  transition: transform 0.3s cubic-bezier(0.22,1,0.36,1), box-shadow 0.3s;
}
.ai-fab:hover { transform: scale(1.08) rotate(-6deg); box-shadow: 0 14px 40px rgba(22, 99, 245, 0.7); }
.ai-fab svg { width: 26px; height: 26px; color: #fff; }
.ai-fab::before { content: ""; position: absolute; inset: -4px; border-radius: 50%; border: 2px solid rgba(56, 225, 255, 0.5); animation: ripple 2.4s ease-out infinite; }
@keyframes ripple { 0% { transform: scale(0.9); opacity: 1; } 100% { transform: scale(1.5); opacity: 0; } }

.ai-panel {
  position: fixed; right: 24px; bottom: 96px; z-index: 120;
  width: min(380px, calc(100vw - 48px));
  border-radius: 20px; border: 1px solid var(--stroke-strong);
  background: rgba(8, 13, 28, 0.92); backdrop-filter: blur(20px);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.6);
  overflow: hidden;
  transform: translateY(16px) scale(0.97); opacity: 0; pointer-events: none;
  transform-origin: bottom right;
  transition: transform 0.32s cubic-bezier(0.22,1,0.36,1), opacity 0.32s;
}
.ai-panel.open { transform: none; opacity: 1; pointer-events: auto; }
.ai-head { display: flex; align-items: center; gap: 12px; padding: 16px 18px; border-bottom: 1px solid var(--stroke); background: linear-gradient(135deg, rgba(22,99,245,0.25), rgba(56,225,255,0.08)); }
.ai-head .dot { width: 9px; height: 9px; border-radius: 50%; background: #34d399; box-shadow: 0 0 8px #34d399; }
.ai-head b { font-size: 15px; }
.ai-head span { display: block; font-size: 12px; color: var(--text-3); }
.ai-body { height: 320px; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 12px; }
.ai-msg { max-width: 86%; padding: 11px 14px; border-radius: 14px; font-size: 13.5px; line-height: 1.6; }
.ai-msg.bot { align-self: flex-start; background: rgba(22, 99, 245, 0.16); border: 1px solid rgba(82, 157, 255, 0.25); border-bottom-left-radius: 4px; }
.ai-msg.user { align-self: flex-end; background: rgba(255, 255, 255, 0.07); border: 1px solid var(--stroke-strong); border-bottom-right-radius: 4px; color: var(--text-2); }
.ai-quick { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 18px 12px; }
.ai-quick button { font-size: 12.5px; padding: 7px 13px; border-radius: 999px; border: 1px solid rgba(82, 157, 255, 0.35); color: #9ecbff; background: rgba(22,99,245,0.1); transition: background 0.2s; }
.ai-quick button:hover { background: rgba(22,99,245,0.25); }
.ai-input { display: flex; gap: 10px; padding: 14px 16px; border-top: 1px solid var(--stroke); }
.ai-input input { flex: 1; background: rgba(255,255,255,0.05); border: 1px solid var(--stroke-strong); border-radius: 12px; padding: 11px 14px; color: #fff; font-size: 14px; outline: none; transition: border-color 0.2s; }
.ai-input input:focus { border-color: rgba(56, 225, 255, 0.55); }
.ai-input button { flex: none; width: 44px; border-radius: 12px; background: var(--gradient-brand); display: grid; place-items: center; }
.ai-input button svg { width: 18px; height: 18px; color: #fff; }

/* 返回顶部 */
.to-top { position: fixed; right: 24px; bottom: 96px; z-index: 110; width: 44px; height: 44px; border-radius: 12px; border: 1px solid var(--stroke-strong); background: rgba(8, 13, 28, 0.8); backdrop-filter: blur(10px); display: grid; place-items: center; color: var(--text-2); opacity: 0; pointer-events: none; transform: translateY(10px); transition: all 0.3s; }
.to-top.show { opacity: 1; pointer-events: auto; transform: none; }
.to-top:hover { color: #fff; border-color: rgba(56,225,255,0.5); }
body.ai-open .to-top { bottom: 490px; }

/* ============ 时间线（关于页） ============ */
.timeline { position: relative; max-width: 760px; margin: 0 auto; padding-left: 32px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(180deg, var(--brand-500), rgba(56,225,255,0.15)); border-radius: 2px; }
.timeline-item { position: relative; padding-bottom: 36px; }
.timeline-item::before { content: ""; position: absolute; left: -31px; top: 7px; width: 14px; height: 14px; border-radius: 50%; background: var(--ink-900); border: 3px solid var(--brand-500); box-shadow: 0 0 14px rgba(22, 99, 245, 0.7); }
.timeline-item h4 { color: #7fd4ff; font-size: 1.05rem; margin-bottom: 6px; }
.timeline-item p { color: var(--text-2); font-size: 0.95rem; }

/* ============ FAQ（GEO 友好） ============ */
.faq { max-width: 820px; margin: 0 auto; display: grid; gap: 14px; }
.faq-item { border: 1px solid var(--stroke); border-radius: var(--radius-md); background: rgba(255,255,255,0.03); overflow: hidden; }
.faq-q { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 20px 24px; text-align: left; font-size: 1.02rem; font-weight: 600; color: var(--text-1); transition: color 0.2s; }
.faq-q:hover { color: #7fd4ff; }
.faq-q .plus { flex: none; width: 26px; height: 26px; border-radius: 8px; border: 1px solid var(--stroke-strong); display: grid; place-items: center; font-size: 16px; color: var(--cyan-400); transition: transform 0.3s, background 0.3s; }
.faq-item.open .plus { transform: rotate(45deg); background: rgba(56,225,255,0.12); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.4s cubic-bezier(0.22,1,0.36,1); }
.faq-a p { padding: 0 24px 22px; color: var(--text-2); font-size: 0.95rem; }

/* ============ 响应式 ============ */
@media (max-width: 1080px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .logo-wall { grid-template-columns: repeat(4, 1fr); }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .flow-step:not(:last-child)::after { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-orbit { opacity: 0.35; }
}

@media (max-width: 900px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: block; }
  .nav-drawer { display: flex; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; }
  .split.reverse > .split-media { order: 0; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-orbit { display: none; }
}

@media (max-width: 600px) {
  body { font-size: 15px; }
  .marquee { --marquee-gap: 34px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 18px 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .card { padding: 26px 22px; }
  .ai-fab { right: 16px; bottom: 16px; }
  .ai-panel { right: 16px; bottom: 84px; }
  .to-top { right: 16px; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .kpi-strip { grid-template-columns: 1fr 1fr; }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; }
}