/* ============================================================
   StudioPro 官网 — 主题样式
   配色与 studiopro.zczbb.online 完全对齐
   ============================================================ */

/* ---------- 主题变量（深色默认，与应用一致） ---------- */
:root {
  --bg: #100e0f;
  --bg-2: #141419;
  --panel: #16161b;
  --panel-2: #1c1c22;
  --panel-glass: rgba(22, 22, 27, 0.72);
  --topbar-bg: rgba(16, 16, 20, 0.82);
  --input-bg: #101014;
  --line: #2a2a31;
  --line-strong: #3a3a42;
  --hover-bg: #26262e;
  --fg: #f5f2e9;
  --muted: #9a958a;
  --accent: #2563eb;
  --accent-bright: #7dd3fc;
  --accent-deep: #06b6d4;
  --accent-soft: rgba(37, 99, 235, 0.14);
  --gold-grad: linear-gradient(135deg, #4facfe 0%, #2563eb 55%, #06b6d4 100%);
  --brand-pro: #3b82f6;
  --danger: #e05d5d;
  --ok: #4caf7d;
  --text-amber: #e8c96a;
  --body-grad: linear-gradient(180deg, #100e0f 0%, #0a0a0c 100%);
  --body-glow-1: rgba(37, 99, 235, 0.12);
  --body-glow-2: rgba(37, 99, 235, 0.08);
  --beam-a: rgba(160, 205, 255, 0.6);
  --beam-a2: rgba(70, 135, 235, 0.32);
  --beam-b: rgba(160, 205, 255, 0.42);
  --beam-b2: rgba(70, 135, 235, 0.22);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.45);
  --shadow-gold: 0 4px 18px rgba(37, 99, 235, 0.18);
  --radius: 10px;
  --radius-lg: 14px;
  --font-body: "Montserrat", "PingFang SC", "Microsoft YaHei", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-heading: "Montserrat", "PingFang SC", "Microsoft YaHei", ui-sans-serif, system-ui, sans-serif;
  color-scheme: dark;
}

/* ---------- 浅色主题（与应用 light 一致） ---------- */
[data-theme="light"] {
  --bg: #f2f6fb;
  --bg-2: #e9eef6;
  --panel: #ffffff;
  --panel-2: #f6f9fd;
  --panel-glass: rgba(255, 255, 255, 0.78);
  --topbar-bg: rgba(255, 255, 255, 0.82);
  --input-bg: #ffffff;
  --line: #dde5f0;
  --line-strong: #c6d2e2;
  --hover-bg: #e8eef7;
  --fg: #1a2338;
  --muted: #5c6b84;
  --accent: #2563eb;
  --accent-bright: #3b82f6;
  --accent-deep: #0891b2;
  --accent-soft: rgba(37, 99, 235, 0.1);
  --danger: #dc2626;
  --ok: #16a34a;
  --text-amber: #9a6b06;
  --body-grad: linear-gradient(180deg, #f2f6fb 0%, #e8eef7 100%);
  --body-glow-1: rgba(37, 99, 235, 0.1);
  --body-glow-2: rgba(6, 182, 212, 0.07);
  --beam-a: rgba(59, 130, 246, 0.3);
  --beam-a2: rgba(37, 99, 235, 0.16);
  --beam-b: rgba(6, 182, 212, 0.24);
  --beam-b2: rgba(37, 99, 235, 0.12);
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.08);
  --shadow-md: 0 6px 20px rgba(16, 24, 40, 0.12);
  --shadow-gold: 0 4px 18px rgba(37, 99, 235, 0.14);
  color-scheme: light;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--body-grad);
  color: var(--fg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img, svg { display: block; max-width: 100%; }

a { color: var(--accent-bright); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--accent); }

::selection { background: var(--accent-soft); color: var(--fg); }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--scroll-thumb, #33333b); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--line-strong); }

.wrap {
  width: min(1140px, 92vw);
  margin: 0 auto;
}

/* ---------- 通用组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--gold-grad);
  color: #fff;
  box-shadow: var(--shadow-gold);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 26px rgba(37, 99, 235, 0.35); color: #fff; }

.btn-ghost {
  background: var(--panel);
  color: var(--fg);
  border-color: var(--line-strong);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-bright); transform: translateY(-2px); }

.btn-lg { padding: 15px 32px; font-size: 16px; border-radius: 12px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 13px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-bright);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.3px;
  border: 1px solid rgba(37, 99, 235, 0.28);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--gold-grad);
  border-radius: 2px;
}

.section { padding: 96px 0; position: relative; }
.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

h2 { font-size: clamp(28px, 4vw, 40px); margin-bottom: 16px; }
h3 { font-size: 19px; }

.section-sub { color: var(--muted); font-size: 16px; }

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

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--topbar-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 66px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--fg);
}
.brand:hover { color: var(--fg); }

.brand-mark {
  width: 34px;
  height: 34px;
  flex: none;
  border-radius: 30%;
  object-fit: cover;
}

.brand-name {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.brand-name em {
  font-style: normal;
  background: var(--gold-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.brand-sub {
  display: block;
  font-size: 11px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.5px;
  margin-top: -2px;
  white-space: nowrap;
}

.nav { display: flex; align-items: center; gap: 6px; }
.nav-link {
  position: relative;
  padding: 9px 16px;
  border-radius: 9px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-link:hover { color: var(--fg); background: var(--hover-bg); }
.nav-link.active { color: var(--fg); }
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--gold-grad);
}

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

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  background: var(--panel);
  color: var(--fg);
  cursor: pointer;
  font-size: 17px;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.theme-toggle:hover { border-color: var(--accent); }

.nav-burger {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  background: var(--panel);
  color: var(--fg);
  font-size: 20px;
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 120px 0 110px;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(640px 420px at 12% 8%, var(--body-glow-1), transparent 65%),
    radial-gradient(720px 460px at 88% 20%, var(--body-glow-2), transparent 60%);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero-badge-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }

.hero h1 {
  font-size: clamp(34px, 5.2vw, 58px);
  line-height: 1.12;
  margin-bottom: 22px;
  letter-spacing: -0.02em;
}

.hero-desc {
  color: var(--muted);
  font-size: 17px;
  max-width: 520px;
  margin-bottom: 34px;
}

.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  color: var(--muted);
  font-size: 14px;
}
.hero-tags span { display: inline-flex; align-items: center; gap: 7px; }
.hero-tags .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold-grad);
  box-shadow: 0 0 10px rgba(37, 99, 235, 0.6);
}

/* Hero 信号图 */
.hero-visual {
  position: relative;
}
.diagram-card {
  position: relative;
  background: var(--panel-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.diagram-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(160deg, rgba(37, 99, 235, 0.4), transparent 40%, transparent 70%, rgba(6, 182, 212, 0.25));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}
.diagram-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.diagram-title .t {
  font-size: 14px;
  font-weight: 700;
  color: var(--fg);
}
.diagram-title .live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--ok);
  font-weight: 600;
}
.diagram-title .live::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 0 rgba(76, 175, 125, 0.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(76, 175, 125, 0.55); }
  70% { box-shadow: 0 0 0 8px rgba(76, 175, 125, 0); }
  100% { box-shadow: 0 0 0 0 rgba(76, 175, 125, 0); }
}

.diagram-svg { width: 100%; height: auto; }

.diagram-svg .node-box {
  fill: var(--panel-2);
  stroke: var(--line-strong);
  stroke-width: 1.2;
  rx: 9;
  transition: stroke 0.3s ease;
}
.diagram-svg .node-label {
  fill: var(--fg);
  font-size: 11.5px;
  font-weight: 600;
  font-family: var(--font-body);
}
.diagram-svg .node-sub {
  fill: var(--muted);
  font-size: 9px;
  font-family: var(--font-body);
}
.diagram-svg .port-in { fill: var(--accent-bright); }
.diagram-svg .port-out { fill: var(--accent-deep); }
.diagram-svg .cable {
  fill: none;
  stroke: url(#cableGrad);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-dasharray: 7 9;
  animation: flow 1.4s linear infinite;
}
.diagram-svg .cable.cable2 { stroke: url(#cableGrad2); animation-duration: 1.9s; }
.diagram-svg .cable.cable3 { stroke: url(#cableGrad3); animation-duration: 2.4s; }
@keyframes flow { to { stroke-dashoffset: -32; } }

.diagram-caption {
  margin-top: 16px;
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 12.5px;
}
.diagram-caption b { color: var(--accent-bright); font-weight: 600; }

/* ---------- 亮点带 ---------- */
.highlights { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-2); }
.highlights-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.highlight-item {
  padding: 30px 28px;
  border-right: 1px solid var(--line);
}
.highlight-item:last-child { border-right: none; }
.highlight-item .num {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}
.highlight-item .label { color: var(--muted); font-size: 14px; }

/* ---------- 能力卡片 ---------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px 28px;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.card:hover {
  transform: translateY(-5px);
  border-color: rgba(37, 99, 235, 0.45);
  box-shadow: var(--shadow-gold);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-soft);
  border: 1px solid rgba(37, 99, 235, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.card-icon svg { width: 24px; height: 24px; }

.card h3 { margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 14.5px; }
.card ul { margin-top: 14px; list-style: none; }
.card ul li {
  position: relative;
  padding-left: 18px;
  color: var(--muted);
  font-size: 13.5px;
  margin-bottom: 7px;
}
.card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--gold-grad);
}

.card-cta { display: inline-flex; margin-top: 18px; font-size: 14px; font-weight: 600; }

/* ---------- 功能详述行 ---------- */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 40px 0;
}
.feature-row + .feature-row { border-top: 1px solid var(--line); }

.feature-text .badge { margin-bottom: 16px; }
.feature-text h3 { font-size: clamp(22px, 3vw, 28px); margin-bottom: 14px; }
.feature-text p { color: var(--muted); margin-bottom: 12px; }
.feature-text .feat-list { margin-top: 18px; list-style: none; }
.feature-text .feat-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
  color: var(--fg);
  font-size: 15px;
}
.feature-text .feat-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--ok);
  font-weight: 800;
}

.feature-visual {
  position: relative;
}
.feature-visual .panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-md);
}
.feature-visual .mini-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 14px;
}
.feature-visual .mini-title::before {
  content: "";
  width: 18px;
  height: 3px;
  border-radius: 3px;
  background: var(--gold-grad);
}

/* 小信号图（功能行） */
.mini-diagram { width: 100%; height: auto; }

/* 虚拟 UI 示意 */
.mock-ui {
  font-family: var(--font-body);
  font-size: 12.5px;
  color: var(--fg);
}
.mock-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  margin-bottom: 8px;
}
.mock-row .k { color: var(--muted); width: 92px; flex: none; }
.mock-row .v { color: var(--fg); font-weight: 600; flex: 1; }
.mock-row .pill {
  font-size: 11px;
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-bright);
  border: 1px solid rgba(37, 99, 235, 0.3);
}
.mock-row .pill.green { background: rgba(76, 175, 125, 0.14); color: var(--ok); border-color: rgba(76, 175, 125, 0.35); }
.mock-row .pill.amber { background: rgba(232, 201, 106, 0.12); color: var(--text-amber); border-color: rgba(232, 201, 106, 0.3); }

.mock-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 12px;
}
.mock-buttons .b {
  text-align: center;
  padding: 10px 4px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  background: var(--panel-2);
  font-size: 12px;
  font-weight: 600;
  color: var(--fg);
}
.mock-buttons .b.on { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-bright); }

/* 终端/列表示意 */
.mock-list { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.mock-list .head {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 8px;
  padding: 9px 14px;
  background: var(--bg-2);
  color: var(--muted);
  font-size: 11.5px;
  font-weight: 600;
}
.mock-list .row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 8px;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
}
.mock-list .row .s { color: var(--muted); }
.mock-list .row .ok { color: var(--ok); font-weight: 600; }

/* ---------- 场景 ---------- */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.scenario-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.scenario-card:hover { transform: translateY(-4px); border-color: rgba(37, 99, 235, 0.45); }
.scenario-card .emoji { font-size: 28px; margin-bottom: 14px; }
.scenario-card h3 { font-size: 16.5px; margin-bottom: 8px; }
.scenario-card p { color: var(--muted); font-size: 13.5px; }

/* ---------- CTA 带 ---------- */
.cta-band {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.16), rgba(6, 182, 212, 0.1));
  border: 1px solid rgba(37, 99, 235, 0.35);
  border-radius: 20px;
  padding: 64px 48px;
  text-align: center;
}
.cta-band h2 { margin-bottom: 14px; }
.cta-band p { color: var(--muted); max-width: 560px; margin: 0 auto 30px; }
.cta-band .cta-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

/* ---------- 支持页 ---------- */
.support-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}
.support-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.support-card:hover { transform: translateY(-4px); border-color: rgba(37, 99, 235, 0.45); }
.support-card .icon {
  width: 52px; height: 52px;
  border-radius: 13px;
  background: var(--accent-soft);
  border: 1px solid rgba(37, 99, 235, 0.3);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.support-card h3 { margin-bottom: 10px; }
.support-card p { color: var(--muted); font-size: 14.5px; margin-bottom: 20px; }

.qr-card {
  display: flex;
  gap: 26px;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
}
.qr-img {
  width: 160px; height: 160px;
  flex: none;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  padding: 8px;
  background: #fff;
}
.qr-img img { width: 100%; height: 100%; object-fit: contain; border-radius: 6px; }
.qr-info h3 { margin-bottom: 8px; }
.qr-info p { color: var(--muted); font-size: 14px; margin-bottom: 6px; }

/* ---------- 下载页 ---------- */
.download-hero { text-align: center; padding: 88px 0 40px; }
.download-hero h1 { font-size: clamp(30px, 4.5vw, 46px); margin-bottom: 14px; }
.download-hero p { color: var(--muted); max-width: 620px; margin: 0 auto; }

.download-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin: 48px 0 20px;
}
.dl-card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.dl-card:hover { transform: translateY(-5px); border-color: rgba(37, 99, 235, 0.45); box-shadow: var(--shadow-gold); }
.dl-card .dl-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: var(--accent-soft);
  border: 1px solid rgba(37, 99, 235, 0.3);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 22px;
}
.dl-card .dl-icon svg { width: 28px; height: 28px; }
.dl-card h3 { font-size: 19px; margin-bottom: 8px; }
.dl-card .meta { color: var(--muted); font-size: 13px; margin-bottom: 14px; }
.dl-card .desc { color: var(--muted); font-size: 14px; flex: 1; margin-bottom: 22px; }
.dl-card .dl-size {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  color: var(--text-amber);
  font-weight: 600;
  margin-bottom: 16px;
}
.dl-card .btn { width: 100%; }

.req-box {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin-top: 30px;
}
.req-box h3 { margin-bottom: 16px; }
.req-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 30px; }
.req-item { display: flex; gap: 12px; align-items: flex-start; font-size: 14px; color: var(--fg); }
.req-item .t { color: var(--muted); flex: none; width: 88px; }
.req-item svg { width: 17px; height: 17px; flex: none; margin-top: 3px; color: var(--ok); }

.notice-box {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-top: 26px;
  padding: 18px 22px;
  border-radius: 12px;
  border: 1px solid rgba(232, 201, 106, 0.35);
  background: rgba(232, 201, 106, 0.08);
  color: var(--text-amber);
  font-size: 14px;
}
.notice-box svg { width: 20px; height: 20px; flex: none; margin-top: 2px; }

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--line);
  background: var(--bg-2);
  padding: 44px 0 36px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}
.footer-brand .brand { margin-bottom: 14px; }
.footer-brand p { color: var(--muted); font-size: 13.5px; max-width: 340px; }
.footer-col h4 { font-size: 14px; margin-bottom: 16px; color: var(--fg); }
.footer-col a {
  display: block;
  color: var(--muted);
  font-size: 13.5px;
  margin-bottom: 10px;
}
.footer-col a:hover { color: var(--accent-bright); }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
}
.footer-bottom .icp a { color: var(--muted); }
.footer-bottom .icp a:hover { color: var(--accent-bright); }

/* ---------- 动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero { padding: 84px 0 80px; }
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .highlights-grid { grid-template-columns: repeat(2, 1fr); }
  .highlight-item:nth-child(2) { border-right: none; }
  .highlight-item:nth-child(1), .highlight-item:nth-child(2) { border-bottom: 1px solid var(--line); }
  .feature-row { grid-template-columns: 1fr; gap: 36px; }
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
  .support-grid { grid-template-columns: 1fr; }
  .download-cards { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav { display: none; }
  .nav.open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: 66px;
    left: 0;
    right: 0;
    background: var(--topbar-bg);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    padding: 12px 4vw 20px;
    gap: 4px;
  }
  .nav.open .nav-link { padding: 13px 16px; }
  .nav-burger { display: inline-flex; align-items: center; justify-content: center; }
  .topbar-actions .btn { display: none; }
  .section { padding: 68px 0; }
  .cards-grid { grid-template-columns: 1fr; }
  .cta-band { padding: 44px 24px; }
  .qr-card { flex-direction: column; text-align: center; }
  .req-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 520px) {
  .highlights-grid { grid-template-columns: 1fr; }
  .highlight-item { border-right: none; border-bottom: 1px solid var(--line); }
  .highlight-item:last-child { border-bottom: none; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .hero-cta .btn { width: 100%; }
}