/* =====================================================================
   LaQuake 官网 · Liquid Glass Design
   参考：Apple Human Interface Guidelines - Liquid Glass
        github.com/samasante/liquid-glass（SDF 折射思路的 CSS 渐进实现）
   ===================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  --bg-0: #04070f;
  --bg-1: #070d1c;

  --ink-1: #eef3ff;
  --ink-2: #a9b6d6;
  --ink-3: #7583a6;

  --line: rgba(255, 255, 255, 0.10);
  --line-strong: rgba(255, 255, 255, 0.22);

  --cyan: #22d3ee;
  --sky: #38bdf8;
  --indigo: #818cf8;
  --violet: #a78bfa;
  --emerald: #34d399;
  --rose: #fb7185;
  --amber: #fbbf24;

  --grad-primary: linear-gradient(135deg, #2dd4bf 0%, #38bdf8 45%, #818cf8 100%);
  --grad-text: linear-gradient(100deg, #67e8f9 0%, #7dd3fc 35%, #a5b4fc 75%, #c4b5fd 100%);

  --glass-fill: linear-gradient(140deg,
      rgba(255, 255, 255, 0.10) 0%,
      rgba(255, 255, 255, 0.045) 38%,
      rgba(255, 255, 255, 0.018) 70%,
      rgba(255, 255, 255, 0.06) 100%);
  --glass-blur: blur(24px) saturate(180%);
  --glass-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.20),
    inset 0 -1px 0 rgba(255, 255, 255, 0.05),
    inset 0 0 24px rgba(255, 255, 255, 0.03),
    0 24px 60px -24px rgba(2, 8, 24, 0.75);

  --r-lg: 26px;
  --r-md: 20px;
  --r-sm: 14px;

  --ease-spring: cubic-bezier(0.34, 1.4, 0.36, 1);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);

  --container: 1180px;
  --nav-h: 72px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 96px; }

body {
  font-family: "OPPO Sans", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
    "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--ink-1);
  background: var(--bg-0);
  line-height: 1.7;
  font-size: 16px;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed; inset: 0;
  background:
    radial-gradient(1200px 800px at 80% -10%, rgba(56, 189, 248, 0.08), transparent 60%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 55%, #03050b 100%);
  z-index: -2;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
code { font-family: "JetBrains Mono", "Cascadia Code", Consolas, "Courier New", monospace; }
::selection { background: rgba(56, 189, 248, 0.35); color: #fff; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

.container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }

.svg-defs { position: absolute; width: 0; height: 0; overflow: hidden; }

svg use { pointer-events: none; }

/* ---------- Aurora 动态背景 ---------- */
.aurora {
  position: fixed; inset: 0; z-index: -1;
  overflow: hidden;
  filter: blur(10px);
}
.blob {
  position: absolute;
  border-radius: 50%;
  opacity: 0.5;
  will-change: transform;
}
.blob-1 { width: 46vw; height: 46vw; max-width: 680px; max-height: 680px;
  top: -14%; left: -8%;
  background: radial-gradient(circle at 35% 35%, rgba(34, 211, 238, 0.55), transparent 65%);
  animation: drift-1 34s var(--ease-out) infinite alternate; }
.blob-2 { width: 40vw; height: 40vw; max-width: 600px; max-height: 600px;
  top: -10%; right: -10%;
  background: radial-gradient(circle at 60% 40%, rgba(129, 140, 248, 0.5), transparent 65%);
  animation: drift-2 40s ease-in-out infinite alternate; }
.blob-3 { width: 42vw; height: 42vw; max-width: 640px; max-height: 640px;
  bottom: -22%; left: 12%;
  background: radial-gradient(circle at 45% 55%, rgba(45, 212, 191, 0.38), transparent 65%);
  animation: drift-3 46s ease-in-out infinite alternate; }
.blob-4 { width: 34vw; height: 34vw; max-width: 520px; max-height: 520px;
  bottom: -12%; right: 6%;
  background: radial-gradient(circle at 50% 50%, rgba(167, 139, 250, 0.4), transparent 65%);
  animation: drift-1 38s ease-in-out infinite alternate-reverse; }
.blob-5 { width: 22vw; height: 22vw; max-width: 340px; max-height: 340px;
  top: 38%; left: 44%;
  background: radial-gradient(circle at 50% 50%, rgba(251, 191, 36, 0.14), transparent 60%);
  animation: drift-2 52s linear infinite alternate; }

.aurora-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 75%);
}

@keyframes drift-1 {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(6vw, 8vh, 0) scale(1.12); }
  100% { transform: translate3d(-4vw, 14vh, 0) scale(0.95); }
}
@keyframes drift-2 {
  0%   { transform: translate3d(0, 0, 0) scale(1.05); }
  50%  { transform: translate3d(-7vw, 10vh, 0) scale(0.92); }
  100% { transform: translate3d(3vw, -6vh, 0) scale(1.15); }
}
@keyframes drift-3 {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(8vw, -10vh, 0) scale(1.18); }
}

/* ---------- 液态玻璃基元 ---------- */
.glass {
  position: relative;
  background: var(--glass-fill);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--line);
  box-shadow: var(--glass-shadow);
  border-radius: var(--r-lg);
  isolation: isolate;
}
/* 玻璃边缘高光环（顶部受光、底部微弱反射） */
.glass::before {
  content: "";
  position: absolute; inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg,
    rgba(255, 255, 255, 0.55) 0%,
    rgba(255, 255, 255, 0.10) 26%,
    rgba(255, 255, 255, 0) 48%,
    rgba(160, 200, 255, 0.08) 72%,
    rgba(255, 255, 255, 0.22) 100%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  z-index: 1;
}
/* 随指针移动的镜面高光（由 JS 写入 --mx / --my） */
.tilt.glass::after,
.modal::after {
  content: "";
  position: absolute; inset: 0;
  border-radius: inherit;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, -20%),
    rgba(180, 220, 255, 0.13), transparent 55%);
  opacity: 0;
  transition: opacity .4s ease;
  pointer-events: none;
  z-index: 0;
}
.tilt.glass:hover::after,
.modal:hover::after { opacity: 1; }

/* Chromium / Edge：SVG 位移折射（渐进增强，失败自动忽略） */
@supports (backdrop-filter: url(#lg-displace)) or (-webkit-backdrop-filter: url(#lg-displace)) {
  .nav.glass, .modal.glass {
    -webkit-backdrop-filter: var(--glass-blur) url(#lg-displace);
    backdrop-filter: var(--glass-blur) url(#lg-displace);
  }
}

.glass-chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  backdrop-filter: blur(14px) saturate(160%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
  font-size: 13px;
  color: var(--ink-2);
  white-space: nowrap;
}
.glass-chip svg { width: 15px; height: 15px; color: var(--cyan); }

/* ---------- 按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-size: 15px; font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform .35s var(--ease-spring), box-shadow .35s ease, background .3s ease, border-color .3s ease;
  overflow: hidden;
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; flex: none; }

.btn-primary {
  color: #04121f;
  background: var(--grad-primary);
  background-size: 160% 160%;
  box-shadow:
    0 10px 30px -8px rgba(56, 189, 248, 0.55),
    0 2px 10px rgba(129, 140, 248, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.55),
    inset 0 -2px 6px rgba(8, 47, 78, 0.25);
}
.btn-primary:hover {
  transform: translateY(-2px) scale(1.015);
  background-position: 100% 50%;
  box-shadow:
    0 18px 42px -10px rgba(56, 189, 248, 0.7),
    0 4px 14px rgba(129, 140, 248, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.65),
    inset 0 -2px 6px rgba(8, 47, 78, 0.25);
}
.btn-primary:active { transform: translateY(0) scale(0.98); }
/* 流光扫过 */
.btn-primary::after {
  content: "";
  position: absolute; top: 0; bottom: 0;
  left: -80%; width: 55%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.55), transparent);
  transform: skewX(-20deg);
  animation: sheen 4.8s ease-in-out infinite;
}
@keyframes sheen {
  0%, 60% { left: -80%; }
  100% { left: 130%; }
}

.btn-glass {
  color: var(--ink-1);
  border-radius: 999px;
  padding: 14px 26px;
  font-size: 15px; font-weight: 600;
}
.btn-glass:hover { transform: translateY(-2px); border-color: var(--line-strong); background: rgba(255, 255, 255, 0.1); }
.btn-glass:active { transform: translateY(0) scale(0.98); }

.btn-ghost {
  color: var(--ink-1);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 11px 18px;
  font-size: 14px;
  background: rgba(255, 255, 255, 0.04);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.btn-ghost:hover { border-color: var(--line-strong); background: rgba(255, 255, 255, 0.1); transform: translateY(-2px); }
.btn-block { width: 100%; }

/* ---------- 顶部导航 ---------- */
.nav-wrap {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; justify-content: center;
  padding: 14px 20px 0;
  transition: padding .3s ease;
}
.nav {
  width: min(var(--container), 100%);
  min-height: 58px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
  padding: 8px 12px 8px 20px;
  border-radius: var(--r-md);
  transition: background .35s ease, box-shadow .35s ease, min-height .35s var(--ease-out), padding .35s var(--ease-out), border-radius .35s var(--ease-out);
}
.nav-wrap.scrolled { padding-top: 8px; }
.nav-wrap.scrolled .nav {
  min-height: 52px;
  padding-top: 6px;
  padding-bottom: 6px;
  border-radius: 999px;
  background: linear-gradient(140deg, rgba(14, 24, 46, 0.72), rgba(10, 17, 34, 0.6));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.16),
    0 18px 40px -18px rgba(0, 0, 0, 0.8);
}
.nav-wrap.scrolled .brand-logo { width: 32px; height: 32px; }
.nav-wrap.scrolled .brand-text { max-width: 0; opacity: 0; margin-left: -4px; }
.nav-wrap.scrolled .nav-brand { gap: 0; }
.nav-wrap.scrolled .nav-link { padding: 7px 13px; font-size: 14px; }
.nav-wrap.scrolled .nav-fluid { height: 32px; }

.nav-brand { display: flex; align-items: center; gap: 11px; font-weight: 700; font-size: 19px; }
.brand-logo {
  width: 40px; height: 40px; flex: none;
  border-radius: 11px;
  object-fit: cover;
  box-shadow: 0 6px 18px -6px rgba(56, 189, 248, 0.65), inset 0 0 0 1px rgba(255, 255, 255, 0.18);
  transition: width .35s var(--ease-out), height .35s var(--ease-out);
}
.brand-text {
  letter-spacing: 0.04em;
  white-space: nowrap;
  overflow: hidden;
  max-width: 140px;
  opacity: 1;
  transition: max-width .35s var(--ease-out), opacity .25s ease;
}

/* iOS 26 式流体选中玻璃块 */
.nav-menu { position: relative; display: flex; align-items: center; gap: 2px; }
.nav-fluid {
  position: absolute;
  top: 50%; left: 0;
  height: 36px;
  width: 0;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  transform: translateX(0) translateY(-50%);
  background: linear-gradient(140deg,
    rgba(255, 255, 255, 0.24) 0%,
    rgba(190, 225, 255, 0.13) 55%,
    rgba(255, 255, 255, 0.09) 100%);
  border: 1px solid rgba(255, 255, 255, 0.28);
  -webkit-backdrop-filter: blur(14px) saturate(180%);
  backdrop-filter: blur(14px) saturate(180%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.5),
    inset 0 -1px 0 rgba(255, 255, 255, 0.08),
    0 8px 22px -10px rgba(56, 189, 248, 0.55);
  transition:
    transform .62s cubic-bezier(0.34, 1.32, 0.4, 1),
    width .62s cubic-bezier(0.34, 1.32, 0.4, 1),
    opacity .3s ease;
}
.nav-fluid.is-on { opacity: 1; }
.nav-fluid.flowing { animation: fluid-stretch .62s cubic-bezier(0.34, 1.32, 0.4, 1); }
@keyframes fluid-stretch {
  0%   { scale: 1 1; }
  38%  { scale: 1.07 0.94; }
  70%  { scale: 0.97 1.03; }
  100% { scale: 1 1; }
}
.nav-link {
  position: relative;
  z-index: 1;
  padding: 8px 15px;
  border-radius: 999px;
  font-size: 14.5px;
  color: var(--ink-2);
  transition: color .3s ease;
}
.nav-link:hover { color: var(--ink-1); }
.nav-link.is-active { color: var(--ink-1); }
.nav-menu-cta {
  display: inline-flex; align-items: center; gap: 7px;
  margin-left: 8px;
  padding: 9px 17px;
  border-radius: 999px;
  color: #04121f !important;
  background: var(--grad-primary);
  font-weight: 600;
  white-space: nowrap;
  transition: filter .25s ease, transform .25s var(--ease-spring);
  box-shadow: 0 6px 18px -8px rgba(56, 189, 248, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}
.nav-menu-cta svg { width: 16px; height: 16px; }
.nav-menu-cta:hover { filter: brightness(1.08); transform: translateY(-1px); }
.nav-wrap.scrolled .nav-menu-cta { padding: 7px 15px; font-size: 14px; }
.nav-menu-icon {
  display: grid; place-items: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  color: var(--ink-2);
  transition: color .25s ease, background .25s ease;
}
.nav-menu-icon:hover { color: var(--ink-1); background: rgba(255, 255, 255, 0.07); }
.nav-menu-icon svg { width: 19px; height: 19px; }

.nav-toggle { display: none; padding: 9px; }
.nav-toggle svg { width: 20px; height: 20px; }

/* ---------- 通用 Section ---------- */
.section { padding: 58px 0; }
.section-head { max-width: 680px; margin-bottom: 36px; }
.section-head h2 {
  font-size: clamp(30px, 4vw, 42px);
  line-height: 1.22;
  font-weight: 700;
  letter-spacing: 0.01em;
  margin: 16px 0 14px;
}
.section-head p { color: var(--ink-2); font-size: 16px; }
.section-head a { color: var(--sky); display: inline-flex; align-items: center; gap: 4px; border-bottom: 1px solid rgba(125, 211, 252, 0.4); }
.section-head a svg { width: 14px; height: 14px; }
.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--sky);
}
.kicker svg { width: 16px; height: 16px; }
.grad-text {
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  align-items: center; gap: 48px;
  padding-top: calc(var(--nav-h) + 24px);
  padding-bottom: 36px;
}
.hero h1 {
  font-size: clamp(38px, 5.4vw, 62px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: 0.01em;
  margin: 22px 0 22px;
}
.hero-sub { color: var(--ink-2); font-size: 17px; max-width: 540px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 34px 0 30px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; color: var(--ink-3); font-size: 13.5px; }
.hero-meta li { display: inline-flex; align-items: center; gap: 8px; }
.hero-meta svg { width: 16px; height: 16px; color: var(--cyan); }

/* 真实预警窗预览（紧急 / 普通） */
.hero-visual { position: relative; display: grid; place-items: center; padding-top: 26px; }

.alert-toggle {
  position: absolute; top: 0; right: 0;
  z-index: 3; padding: 5px; gap: 4px;
}
.at-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12.5px; font-weight: 600;
  color: var(--ink-3);
  transition: color .3s ease, background .35s ease, box-shadow .35s ease;
}
.at-btn svg { width: 13px; height: 13px; }
.at-btn.is-active { color: #fff; }
.at-btn.is-active[data-mode="urgent"] {
  background: linear-gradient(135deg, #ff6b63, #dc322f);
  box-shadow: 0 6px 16px -6px rgba(220, 50, 47, 0.85), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}
.at-btn.is-active[data-mode="normal"] {
  background: linear-gradient(135deg, #5b9bff, #3a6de0);
  box-shadow: 0 6px 16px -6px rgba(58, 109, 224, 0.85), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.alert-card {
  position: relative;
  width: min(410px, 100%);
  padding: 24px 22px 22px;
  border-radius: 30px;
  color: #fff;
  background:
    radial-gradient(135% 88% at 50% -10%, rgba(132, 164, 214, 0.55), transparent 55%),
    linear-gradient(174deg, #3c5273 0%, #2b3c58 38%, #1d2942 72%, #131b2e 100%);
  border: 1px solid rgba(255, 255, 255, 0.16);
  -webkit-backdrop-filter: blur(8px) saturate(150%);
  backdrop-filter: blur(8px) saturate(150%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    inset 0 -1px 0 rgba(255, 255, 255, 0.05),
    0 50px 90px -30px rgba(8, 18, 40, 0.9);
  animation: float-y 7s ease-in-out infinite;
  transition: background .6s ease, border-color .6s ease, box-shadow .6s ease;
  z-index: 1;
}
.alert-card.is-urgent {
  background:
    radial-gradient(135% 88% at 50% -10%, rgba(255, 138, 116, 0.42), transparent 55%),
    linear-gradient(174deg, #a83638 0%, #82242a 38%, #581b22 72%, #381118 100%);
  border-color: rgba(255, 180, 170, 0.2);
}
@keyframes float-y {
  0%, 100% { transform: translateY(0) rotate(-0.4deg); }
  50% { transform: translateY(-12px) rotate(0.4deg); }
}

.ac-head { display: flex; align-items: center; gap: 12px; }
.ac-badge {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 15px; font-weight: 800; letter-spacing: 0.04em;
  color: #fff; white-space: nowrap;
  background: linear-gradient(135deg, #5b9bff, #3a6de0);
  box-shadow: 0 8px 18px -8px rgba(58, 109, 224, 0.9), inset 0 1px 0 rgba(255, 255, 255, 0.35);
  transition: background .5s ease, box-shadow .5s ease;
}
.is-urgent .ac-badge {
  background: linear-gradient(135deg, #ff6a62, #dc322f);
  box-shadow: 0 8px 18px -8px rgba(220, 50, 47, 0.9), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}
.ac-report { font-size: 17px; font-weight: 500; color: rgba(255, 255, 255, 0.78); }
.ac-x {
  margin-left: auto;
  width: 40px; height: 40px; flex: none;
  display: grid; place-items: center;
  border-radius: 50%;
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15);
}
.ac-x svg { width: 17px; height: 17px; }

.ac-place {
  font-size: 30px; font-weight: 800;
  line-height: 1.2; letter-spacing: 0.01em;
  margin: 18px 0 2px;
}
.ac-mag { font-size: 17px; color: rgba(255, 255, 255, 0.72); margin-bottom: 18px; }
.ac-mag b { font-weight: 700; margin-left: 6px; }

.panel {
  background: rgba(8, 12, 22, 0.32);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.ac-count { padding: 18px 20px 16px; text-align: center; }
.ac-count p { font-size: 14.5px; color: rgba(255, 255, 255, 0.72); letter-spacing: 0.05em; }
.ac-num {
  display: flex; align-items: baseline; justify-content: center;
  font-size: 88px; font-weight: 800; line-height: 1.05;
  font-variant-numeric: tabular-nums;
}
.ac-num span { display: inline-block; min-width: 1.35em; text-align: center; }
.ac-num em { font-style: normal; font-size: 24px; font-weight: 600; margin-left: 8px; color: rgba(255, 255, 255, 0.75); }
.ac-num.tick span { animation: num-tick .45s ease; }
@keyframes num-tick {
  0% { transform: translateY(-8px); opacity: 0.2; }
  100% { transform: translateY(0); opacity: 1; }
}

.ac-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 14px; }
.ac-row .panel { padding: 16px 12px; text-align: center; }
.ac-row b { display: block; font-size: 34px; font-weight: 800; line-height: 1.15; font-variant-numeric: tabular-nums; }
.ac-row b em { font-style: normal; font-size: 15px; font-weight: 600; margin-left: 4px; color: rgba(255, 255, 255, 0.65); }
.ac-row p { font-size: 13.5px; color: rgba(255, 255, 255, 0.62); margin-top: 3px; }

.ac-advice {
  margin-top: 14px;
  padding: 15px 18px;
  border-radius: 18px;
  background: rgba(8, 12, 22, 0.34);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 15px; text-align: center; letter-spacing: 0.02em;
  color: #f3ead2;
}
.ac-advice b { color: #ffd24a; font-weight: 700; }

.alert-glow {
  position: absolute; inset: 10% -8% -8%;
  border-radius: 40%;
  background: radial-gradient(ellipse at center, rgba(70, 120, 210, 0.35), transparent 70%);
  filter: blur(44px);
  z-index: 0;
  transition: background .6s ease;
}
.hero-visual.is-urgent .alert-glow {
  background: radial-gradient(ellipse at center, rgba(220, 60, 50, 0.32), transparent 70%);
}

/* ---------- 功能卡片 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.card {
  padding: 28px 26px;
  border-radius: var(--r-md);
  transition: transform .45s var(--ease-out), border-color .3s ease, box-shadow .4s ease;
}
.tilt:hover {
  transform: translateY(-6px);
  border-color: rgba(165, 220, 255, 0.28);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.26),
    inset 0 -1px 0 rgba(255, 255, 255, 0.05),
    0 30px 60px -22px rgba(10, 30, 60, 0.85),
    0 0 40px -18px rgba(56, 189, 248, 0.4);
}
.card-icon {
  width: 48px; height: 48px;
  display: grid; place-items: center;
  border-radius: 15px;
  margin-bottom: 18px;
  color: #bae6fd;
  background: linear-gradient(150deg, rgba(56, 189, 248, 0.22), rgba(129, 140, 248, 0.12));
  border: 1px solid rgba(125, 211, 252, 0.22);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25), 0 8px 22px -10px rgba(56, 189, 248, 0.5);
}
.card-icon svg { width: 24px; height: 24px; }
.card h3 { font-size: 17.5px; font-weight: 700; margin-bottom: 8px; }
.card p { font-size: 14px; color: var(--ink-2); }

/* ---------- 下载平台 ---------- */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.plat {
  border-radius: var(--r-md);
  padding: 26px 24px;
  display: flex; flex-direction: column;
  transition: transform .4s var(--ease-out), border-color .3s ease, box-shadow .4s ease;
}
.plat:hover { transform: translateY(-5px); }
.plat-icon {
  width: 50px; height: 50px;
  display: grid; place-items: center;
  border-radius: 15px;
  margin-bottom: 16px;
  color: #e0f2fe;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2);
}
.plat-icon svg { width: 25px; height: 25px; }
.plat h3 { font-size: 18px; display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.plat h3 span { font-size: 12.5px; color: var(--ink-3); font-weight: 500; }
.plat p { font-size: 13.5px; color: var(--ink-2); margin: 4px 0 16px; }

.plat-main {
  grid-column: span 4;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px 32px;
  align-items: center;
  padding: 32px 34px;
}
.plat-top { display: flex; align-items: center; gap: 18px; }
.plat-top .plat-icon { margin-bottom: 0; width: 58px; height: 58px; }
.plat-top .plat-icon svg { width: 30px; height: 30px; }
.plat-desc { margin: 2px 0 0 !important; }
.plat-badge {
  justify-self: start;
  padding: 5px 13px; border-radius: 999px;
  font-size: 12px; font-weight: 700;
  color: #05202b;
  background: var(--grad-primary);
  box-shadow: 0 6px 16px -6px rgba(56, 189, 248, 0.7);
}
.plat-points {
  grid-column: 1 / -1;
  display: flex; flex-wrap: wrap; gap: 10px 28px;
  color: var(--ink-2); font-size: 13.5px;
}
.plat-points li { display: inline-flex; align-items: center; gap: 8px; }
.plat-points svg { width: 16px; height: 16px; color: var(--emerald); flex: none; }
.plat-main .btn { justify-self: end; min-width: 320px; }

.plat-soon { opacity: 0.88; }
.plat-soon:hover { opacity: 1; }
.soon-tag {
  margin-top: auto;
  align-self: flex-start;
  font-size: 12px; letter-spacing: 0.08em;
  padding: 6px 13px; border-radius: 999px;
  color: var(--violet);
  background: rgba(167, 139, 250, 0.12);
  border: 1px dashed rgba(167, 139, 250, 0.45);
}
.plat-icon-hm { color: #ddd6fe; background: rgba(167, 139, 250, 0.14); border-color: rgba(167, 139, 250, 0.3); }
.plat-build .btn { margin-top: auto; }

.download-note {
  margin-top: 26px;
  display: flex; align-items: flex-start; gap: 10px;
  padding: 18px 22px;
  border-radius: var(--r-sm);
  color: var(--ink-2); font-size: 13.5px;
  background: rgba(251, 191, 36, 0.07);
  border: 1px solid rgba(251, 191, 36, 0.22);
}
.download-note svg { width: 18px; height: 18px; color: var(--amber); flex: none; margin-top: 3px; }
.download-note b { color: #fcd34d; font-weight: 600; }

/* ---------- 更新日志时间线 ---------- */
.timeline { position: relative; padding-left: 6px; }
.timeline::before {
  content: ""; position: absolute;
  left: 17px; top: 8px; bottom: 8px; width: 2px;
  background: linear-gradient(180deg, rgba(56, 189, 248, 0.55), rgba(129, 140, 248, 0.25) 55%, transparent);
  border-radius: 2px;
}
.tl-item { position: relative; display: grid; grid-template-columns: 36px 1fr; gap: 22px; padding-bottom: 26px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-rail { position: relative; display: grid; justify-items: center; padding-top: 26px; }
.tl-dot {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 50%;
  color: var(--sky);
  background: rgba(12, 22, 42, 0.9);
  border: 1px solid rgba(125, 211, 252, 0.4);
  box-shadow: 0 0 0 5px rgba(7, 13, 26, 0.9), 0 0 18px -2px rgba(56, 189, 248, 0.5);
  z-index: 1;
}
.tl-dot svg { width: 16px; height: 16px; }
.tl-item.is-latest .tl-dot {
  color: #04121f;
  background: var(--grad-primary);
  border-color: transparent;
  box-shadow: 0 0 0 5px rgba(7, 13, 26, 0.9), 0 0 24px -2px rgba(56, 189, 248, 0.8);
}
.tl-card { padding: 26px 28px; border-radius: var(--r-md); }
.tl-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.tl-head h3 { font-size: 21px; font-weight: 700; letter-spacing: 0.02em; }
.tl-head time { font-size: 13px; color: var(--ink-3); display: block; margin-top: 2px; }
.tl-badges { display: flex; align-items: center; gap: 10px; }
.latest-badge {
  padding: 4px 12px; border-radius: 999px;
  font-size: 12px; font-weight: 700;
  color: #04141f; background: var(--grad-primary);
}
.tl-note {
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 13.5px;
  color: #fde68a;
  background: rgba(251, 191, 36, 0.09);
  border: 1px solid rgba(251, 191, 36, 0.22);
}
.tl-groups { display: grid; gap: 14px; margin-top: 16px; }
.tl-group h4 {
  display: inline-block;
  font-size: 12px; font-weight: 700; letter-spacing: 0.06em;
  padding: 3px 11px; border-radius: 999px; margin-bottom: 8px;
}
.tag-new    { color: #6ee7b7; background: rgba(52, 211, 153, 0.12); border: 1px solid rgba(52, 211, 153, 0.3); }
.tag-fix    { color: #fda4af; background: rgba(251, 113, 133, 0.1);  border: 1px solid rgba(251, 113, 133, 0.3); }
.tag-opt    { color: #7dd3fc; background: rgba(56, 189, 248, 0.1);  border: 1px solid rgba(56, 189, 248, 0.3); }
.tag-change { color: #c4b5fd; background: rgba(167, 139, 250, 0.12); border: 1px solid rgba(167, 139, 250, 0.32); }
.tag-key    { color: #fcd34d; background: rgba(251, 191, 36, 0.12); border: 1px solid rgba(251, 191, 36, 0.34); }
.tl-group ul { display: grid; gap: 7px; }
.tl-group li {
  position: relative; padding-left: 18px;
  font-size: 14px; color: var(--ink-2);
}
.tl-group li::before {
  content: ""; position: absolute; left: 2px; top: 11px;
  width: 6px; height: 6px; border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--indigo));
  opacity: .8;
}
.tl-group li b { color: var(--ink-1); font-weight: 600; }
.tl-link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 18px;
  font-size: 13.5px; font-weight: 600; color: var(--sky);
  border-bottom: 1px solid rgba(125, 211, 252, 0.35);
  transition: gap .25s ease, color .25s ease;
}
.tl-link svg { width: 14px; height: 14px; }
.tl-link:hover { gap: 10px; color: #bae6fd; }
.noscript-note { color: var(--ink-2); }

/* ---------- 联系卡片 ---------- */
.contact-card {
  display: grid; grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  padding: 56px 54px;
  overflow: hidden;
}
.contact-copy h2 { font-size: clamp(26px, 3.2vw, 36px); margin: 14px 0 12px; }
.contact-copy p { color: var(--ink-2); max-width: 520px; }
.contact-copy p b { color: var(--ink-1); }
.contact-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.contact-deco { display: grid; place-items: center; }
.contact-deco svg { width: min(240px, 80%); }
.deco-ring { stroke: rgba(125, 211, 252, 0.3); stroke-width: 1.4; stroke-dasharray: 6 8; animation: spin 26s linear infinite; transform-origin: 100px 80px; }
.deco-ring-2 { stroke: rgba(167, 139, 250, 0.35); animation-duration: 18s; animation-direction: reverse; }
.deco-wave { stroke: url(#wg); stroke: var(--cyan); stroke-width: 2.4; stroke-linecap: round; opacity: .8; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 页脚 ---------- */
.footer { margin-top: 20px; border-top: 1px solid rgba(255, 255, 255, 255, 0.07); background: rgba(4, 8, 18, 0.55); }
.footer-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 28px; flex-wrap: wrap;
  padding: 40px 20px 28px;
}
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-brand p { font-size: 13px; color: var(--ink-3); margin-top: 2px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 6px 8px; }
.footer-links a { font-size: 13.5px; color: var(--ink-2); padding: 7px 12px; border-radius: 999px; transition: .25s; }
.footer-links a:hover { color: var(--ink-1); background: rgba(255, 255, 255, 0.07); }
.footer-disclaim { padding: 0 20px 34px; }
.footer-disclaim > p {
  display: flex; gap: 9px;
  font-size: 12.5px; color: var(--ink-3);
  padding: 16px 20px;
  border-radius: var(--r-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}
.footer-disclaim svg { width: 15px; height: 15px; flex: none; margin-top: 3px; color: var(--amber); }
.footer-copy { display: block; text-align: center; margin-top: 18px; font-size: 12.5px; color: #5b688a; }

/* ---------- 下载模态框 ---------- */
.modal-root {
  position: fixed; inset: 0; z-index: 200;
  display: grid; place-items: center;
  padding: 20px;
  visibility: hidden; opacity: 0;
  transition: opacity .3s ease, visibility 0s .3s;
}
.modal-root.open { visibility: visible; opacity: 1; transition: opacity .3s ease; }
.modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(3, 7, 16, 0.6);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.modal {
  position: relative;
  width: min(540px, 100%);
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  padding: 32px 32px 28px;
  border-radius: 28px;
  transform: translateY(26px) scale(0.94);
  opacity: 0;
  transition: transform .45s var(--ease-spring), opacity .3s ease;
}
.modal-root.open .modal { transform: translateY(0) scale(1); opacity: 1; }
.modal-close {
  position: absolute; top: 18px; right: 18px;
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 50%;
  color: var(--ink-2);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--line);
  transition: .25s;
  z-index: 2;
}
.modal-close:hover { color: var(--ink-1); background: rgba(255, 255, 255, 0.14); transform: rotate(90deg); }
.modal-close svg { width: 17px; height: 17px; }

.modal-head { display: flex; align-items: center; gap: 16px; margin-bottom: 22px; }
.modal-icon {
  width: 54px; height: 54px; flex: none;
  display: grid; place-items: center;
  border-radius: 17px;
  color: #04121f;
  background: var(--grad-primary);
  box-shadow: 0 10px 26px -10px rgba(56, 189, 248, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.55);
}
.modal-icon svg { width: 27px; height: 27px; }
.modal-head h3 { font-size: 20px; }
.modal-head p { font-size: 13.5px; color: var(--ink-3); }

.modal-file {
  display: flex; align-items: center; gap: 14px;
  padding: 15px 18px; margin-bottom: 18px;
  border-radius: 16px;
}
.file-ico {
  width: 42px; height: 42px; flex: none;
  display: grid; place-items: center;
  border-radius: 12px;
  color: var(--sky);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(125, 211, 252, 0.2);
}
.file-ico svg { width: 21px; height: 21px; }
.file-meta { min-width: 0; }
.file-meta b { font-size: 14.5px; display: block; word-break: break-all; }
.file-meta span { font-size: 12.5px; color: var(--ink-3); }

.modal-cta { margin-bottom: 10px; }
.modal-all {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  font-size: 13.5px; color: var(--ink-2);
  padding: 6px; transition: color .25s, gap .25s;
}
.modal-all svg { width: 14px; height: 14px; }
.modal-all:hover { color: var(--sky); gap: 10px; }

.modal-notes {
  margin-top: 18px; padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: grid; gap: 11px;
}
.modal-notes li {
  display: flex; gap: 10px;
  font-size: 13px; color: var(--ink-2);
}
.modal-notes svg { width: 16px; height: 16px; flex: none; margin-top: 3px; color: var(--sky); }
.modal-notes b { color: var(--ink-1); }
.modal-notes a { color: var(--sky); text-decoration: underline; text-underline-offset: 3px; }
body.modal-open { overflow: hidden; }

/* ---------- 编译指南页 ---------- */
.page-hero { padding: calc(var(--nav-h) + 70px) 0 30px; max-width: 820px; }
.page-hero h1 { font-size: clamp(34px, 5vw, 54px); line-height: 1.15; font-weight: 800; margin: 20px 0 18px; }
.page-sub { color: var(--ink-2); font-size: 16.5px; max-width: 640px; }

.notice {
  display: flex; gap: 18px;
  padding: 28px 30px;
  border-radius: var(--r-md);
  border-color: rgba(251, 191, 36, 0.28);
  background: linear-gradient(140deg, rgba(251, 191, 36, 0.1), rgba(255, 255, 255, 0.03) 55%);
}
.notice-icon {
  width: 46px; height: 46px; flex: none;
  display: grid; place-items: center;
  border-radius: 14px;
  color: #fcd34d;
  background: rgba(251, 191, 36, 0.13);
  border: 1px solid rgba(251, 191, 36, 0.3);
}
.notice-icon svg { width: 23px; height: 23px; }
.notice h3 { font-size: 16.5px; margin-bottom: 8px; color: #fde68a; }
.notice ul { display: grid; gap: 7px; }
.notice li {
  position: relative; padding-left: 16px;
  font-size: 14px; color: var(--ink-2);
}
.notice li::before { content: ""; position: absolute; left: 2px; top: 11px; width: 5px; height: 5px; border-radius: 50%; background: var(--amber); }
.notice b { color: var(--ink-1); }
code {
  font-size: 0.88em;
  padding: 2px 7px; border-radius: 7px;
  background: rgba(125, 211, 252, 0.1);
  border: 1px solid rgba(125, 211, 252, 0.16);
  color: #bae6fd;
}

/* Agent 辅助卡片 */
.agent-card {
  padding: 30px 32px;
  background:
    radial-gradient(120% 160% at 100% 0%, rgba(56, 189, 248, 0.1), transparent 55%),
    var(--glass-fill);
}
.agent-head { display: flex; gap: 18px; align-items: flex-start; margin-bottom: 18px; }
.agent-icon {
  width: 50px; height: 50px; flex: none;
  display: grid; place-items: center;
  border-radius: 16px;
  color: #04121f;
  background: var(--grad-primary);
  box-shadow: 0 10px 26px -12px rgba(56, 189, 248, 0.8), inset 0 1px 0 rgba(255, 255, 255, 0.55);
}
.agent-icon svg { width: 25px; height: 25px; }
.agent-head h2 { font-size: 22px; margin-bottom: 5px; }
.agent-head p { font-size: 14px; color: var(--ink-2); }
.agent-card .codeblock { margin-top: 0; }
.agent-tip {
  display: flex; gap: 9px;
  margin-top: 14px;
  font-size: 13px; color: var(--ink-2);
}
.agent-tip svg { width: 16px; height: 16px; flex: none; margin-top: 3px; color: var(--amber); }
.agent-tip b { color: var(--ink-1); }

.resource-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.resource { display: block; height: 100%; }
.resource-link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 14px;
  font-size: 13px; color: var(--sky);
  transition: gap .25s;
}
.resource-link svg { width: 14px; height: 14px; }
.resource:hover .resource-link { gap: 10px; }

.steps { display: grid; gap: 16px; }
.step {
  display: grid; grid-template-columns: 52px 1fr;
  gap: 20px;
  padding: 28px 30px;
}
.step-num {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 14px;
  font-size: 17px; font-weight: 800;
  color: #04121f;
  background: var(--grad-primary);
  box-shadow: 0 8px 20px -8px rgba(56, 189, 248, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}
.step-num svg { width: 21px; height: 21px; }
.step-num-linux { background: linear-gradient(135deg, #fbbf24, #fb923c); }
.step-num-mac { background: linear-gradient(135deg, #e2e8f0, #94a3b8); color: #0f172a; }
.step-body h3 { font-size: 17.5px; margin-bottom: 6px; }
.step-body p { font-size: 14px; color: var(--ink-2); }
.step-links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 10px 0 4px; }
.step-links a { display: inline-flex; align-items: center; gap: 5px; font-size: 13.5px; color: var(--sky); }
.step-links a svg { width: 13px; height: 13px; }

.codeblock {
  position: relative;
  margin-top: 14px;
  border-radius: 14px;
  background: rgba(3, 8, 19, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.09);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), inset 0 0 30px rgba(0, 0, 0, 0.35);
  overflow: hidden;
}
.codeblock pre { padding: 16px 18px; overflow-x: auto; }
.codeblock code {
  background: none; border: 0; padding: 0;
  font-size: 13px; line-height: 1.75; color: #cfe3ff;
  white-space: pre;
}
.code-copy {
  position: absolute; top: 9px; right: 9px;
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 10px;
  color: var(--ink-3);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  opacity: 0; transition: .25s;
}
.codeblock:hover .code-copy, .code-copy:focus-visible { opacity: 1; }
.code-copy:hover { color: var(--ink-1); background: rgba(255, 255, 255, 0.14); }
.code-copy svg { width: 16px; height: 16px; }
.code-copy.copied { color: var(--emerald); border-color: rgba(52, 211, 153, 0.4); }

.step-tip {
  display: flex; gap: 9px;
  margin-top: 13px;
  padding: 12px 16px;
  font-size: 13px;
  border-radius: 12px;
  color: var(--ink-2);
  background: rgba(56, 189, 248, 0.06);
  border: 1px solid rgba(125, 211, 252, 0.18);
}
.step-tip svg { width: 16px; height: 16px; flex: none; margin-top: 3px; color: var(--sky); }

.platform-notes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.clean-list { display: grid; gap: 9px; margin-top: 6px; }
.clean-list li {
  position: relative; padding-left: 20px;
  font-size: 14px; color: var(--ink-2);
}
.clean-list li::before {
  content: ""; position: absolute; left: 3px; top: 10px;
  width: 7px; height: 7px;
  border-radius: 2px;
  background: linear-gradient(135deg, var(--cyan), var(--indigo));
  transform: rotate(45deg);
}

/* ---------- 滚动显现 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .8s var(--ease-out), transform .8s var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1060px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .plat-main { grid-column: span 2; }
  .hero { grid-template-columns: 1fr; gap: 64px; min-height: 0; padding-top: calc(var(--nav-h) + 70px); }
  .hero-visual { order: -1; }
}

@media (max-width: 820px) {
  .nav-toggle { display: grid; place-items: center; }
  .nav-menu {
    position: absolute; top: calc(100% + 10px); left: 16px; right: 16px;
    flex-direction: column; align-items: stretch;
    gap: 4px;
    padding: 12px;
    border-radius: var(--r-md);
    background: linear-gradient(140deg, rgba(14, 24, 46, 0.92), rgba(10, 17, 34, 0.88));
    border: 1px solid var(--line);
    -webkit-backdrop-filter: blur(28px) saturate(180%);
    backdrop-filter: blur(28px) saturate(180%);
    box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.8);
    transform: translateY(-10px) scale(0.98);
    transform-origin: top center;
    opacity: 0; visibility: hidden; pointer-events: none;
    transition: .3s var(--ease-out);
  }
  .nav-menu.open { transform: none; opacity: 1; visibility: visible; pointer-events: auto; }
  .nav-menu > a { padding: 12px 16px; font-size: 15px; }
  .nav-menu-cta { justify-content: center; margin-left: 0; margin-top: 4px; }
  .nav-menu-icon { display: none; }
  .nav { position: relative; }
  .nav-fluid { display: none; }
  .nav-link.is-active { background: rgba(56, 189, 248, 0.14); }
  .nav-wrap.scrolled .brand-text { max-width: 140px; opacity: 1; margin-left: 0; }
  .nav-wrap.scrolled .nav-brand { gap: 11px; }

  .contact-card { grid-template-columns: 1fr; padding: 40px 28px; }
  .contact-deco { display: none; }
  .resource-grid, .platform-notes { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .container { width: calc(100% - 28px); }
  .section { padding: 44px 0; }
  .section-head { margin-bottom: 28px; }
  .feature-grid, .platform-grid { grid-template-columns: 1fr; }
  .plat-main { grid-column: span 1; grid-template-columns: 1fr; padding: 26px 22px; }
  .plat-main .btn { justify-self: stretch; min-width: 0; }
  .plat-badge { order: -1; }
  .hero-actions .btn { width: 100%; }
  .hero-meta { gap: 8px 16px; }
  .alert-card { padding: 20px 18px; border-radius: 26px; }
  .ac-place { font-size: 25px; }
  .ac-num { font-size: 70px; }
  .ac-num em { font-size: 20px; }
  .ac-row b { font-size: 28px; }
  .ac-badge { padding: 7px 14px; font-size: 13.5px; }
  .ac-report { font-size: 15px; }
  .modal { padding: 26px 22px; border-radius: 24px; }
  .step { grid-template-columns: 1fr; gap: 14px; }
  .step-num { width: 40px; height: 40px; }
  .tl-item { grid-template-columns: 26px 1fr; gap: 14px; }
  .timeline::before { left: 12px; }
  .tl-dot { width: 28px; height: 28px; }
  .tl-dot svg { width: 13px; height: 13px; }
  .tl-card { padding: 22px 20px; }
  .contact-card { padding: 34px 22px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .notice { flex-direction: column; gap: 12px; }
  .agent-card { padding: 24px 20px; }
  .agent-head { gap: 13px; }
  .agent-icon { width: 42px; height: 42px; border-radius: 13px; }
  .agent-icon svg { width: 21px; height: 21px; }
  .brand-text { font-size: 17px; }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .blob { animation: none !important; }
}