:root {
  --sky-50: #f8fbff;
  --sky-100: #eef5ff;
  --sky-200: #dcebff;
  --sky-300: #c3dbfa;
  --blue-400: #5b93f5;
  --blue-500: #3b7cf8;
  --blue-600: #2b63dd;
  --blue-700: #1f4db8;
  --gold-300: #f6ce7e;
  --gold-400: #efb352;
  --gold-500: #e09a2e;
  --gold-600: #c07f16;
  --ink-900: #15223f;
  --ink-700: #3d4d76;
  --ink-500: #71809f;
  --ink-300: #b9c4d9;
  --line: #e3ecf9;
  --green: #1fb573;
  --amber: #f59e0b;
  --red: #ff6b5e;
  --radius-lg: 24px;
  --radius-md: 16px;
  --shadow-soft: 0 18px 50px rgba(37, 68, 138, 0.09);
  --shadow-lift: 0 28px 60px rgba(37, 68, 138, 0.16);
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--sky-50);
  color: var(--ink-900);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; border: none; background: none; cursor: pointer; color: inherit; }
ul { list-style: none; }

#starfield {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

main { position: relative; z-index: 1; }

.container { width: min(1180px, 92%); margin: 0 auto; }
.container-narrow { width: min(860px, 92%); margin: 0 auto; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 34px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.btn-gold {
  background: linear-gradient(135deg, var(--gold-300), var(--gold-500));
  color: #4d3305;
  box-shadow: 0 12px 28px rgba(224, 154, 46, 0.32);
}
.btn-gold:hover { transform: translateY(-3px); box-shadow: 0 18px 40px rgba(224, 154, 46, 0.42); }

.btn-blue {
  background: linear-gradient(135deg, var(--blue-400), var(--blue-600));
  color: #fff;
  box-shadow: 0 12px 28px rgba(59, 124, 248, 0.32);
}
.btn-blue:hover { transform: translateY(-3px); box-shadow: 0 18px 40px rgba(59, 124, 248, 0.42); }

.btn-ghost {
  border: 1.5px solid var(--sky-300);
  color: var(--blue-600);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover { background: var(--sky-100); transform: translateY(-3px); }

.btn-outline-dark {
  border: 1.5px solid var(--ink-900);
  color: var(--ink-900);
}
.btn-outline-dark:hover { background: var(--ink-900); color: #fff; transform: translateY(-3px); }

/* ============ 导航 ============ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background 0.4s ease, box-shadow 0.4s ease;
}
.nav.scrolled {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 4px 24px rgba(37, 68, 138, 0.08);
}
.nav-inner {
  width: min(1240px, 94%);
  margin: 0 auto;
  height: 72px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-brand { display: flex; align-items: center; gap: 12px; }
.nav-logo {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 4px 14px rgba(224, 154, 46, 0.3);
}
.nav-title {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 2px;
  background: linear-gradient(120deg, var(--ink-900), var(--blue-600));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}
.nav-links { display: flex; gap: 6px; margin-left: auto; }
.nav-link {
  padding: 8px 14px;
  border-radius: 10px;
  font-size: 15px;
  color: var(--ink-700);
  transition: color 0.25s ease, background 0.25s ease;
  white-space: nowrap;
}
.nav-link:hover { color: var(--blue-600); background: var(--sky-100); }
.nav-link.active { color: var(--blue-600); font-weight: 600; }
.nav-cta {
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: #4d3305;
  background: linear-gradient(135deg, var(--gold-300), var(--gold-500));
  box-shadow: 0 6px 18px rgba(224, 154, 46, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  white-space: nowrap;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(224, 154, 46, 0.4); }
.nav-burger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-burger span { width: 22px; height: 2px; background: var(--ink-900); border-radius: 2px; transition: 0.3s; }

/* ============ Hero ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 140px 0 80px;
  background:
    radial-gradient(ellipse 65% 50% at 80% 12%, rgba(59, 124, 248, 0.14), transparent 62%),
    radial-gradient(ellipse 50% 42% at 10% 88%, rgba(239, 179, 82, 0.13), transparent 62%),
    linear-gradient(180deg, rgba(232, 242, 255, 0.55) 0%, rgba(251, 253, 255, 0.7) 78%, rgba(248, 251, 255, 0.6) 100%);
  overflow: hidden;
}
.hero-glow { position: absolute; border-radius: 50%; filter: blur(100px); pointer-events: none; }
.hero-glow-1 { width: 480px; height: 480px; top: -140px; right: -80px; background: rgba(91, 147, 245, 0.22); }
.hero-glow-2 { width: 400px; height: 400px; bottom: -120px; left: -100px; background: rgba(246, 206, 126, 0.28); }
.hero-inner {
  width: min(1240px, 94%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
  flex: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid rgba(59, 124, 248, 0.35);
  background: rgba(59, 124, 248, 0.08);
  color: var(--blue-600);
  font-size: 13.5px;
  letter-spacing: 1px;
  margin-bottom: 30px;
}
.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold-500);
  box-shadow: 0 0 10px rgba(224, 154, 46, 0.7);
  animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.75); }
}
.hero-title {
  font-size: clamp(44px, 6vw, 76px);
  font-weight: 800;
  letter-spacing: 4px;
  line-height: 1.15;
  background: linear-gradient(155deg, var(--ink-900) 30%, var(--blue-600) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 18px;
}
.hero-title-sub {
  display: block;
  font-size: clamp(18px, 2.2vw, 26px);
  font-weight: 500;
  letter-spacing: 6px;
  margin-top: 14px;
  background: linear-gradient(90deg, var(--ink-700), var(--blue-500));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-slogan {
  font-size: clamp(17px, 1.8vw, 21px);
  color: var(--gold-600);
  letter-spacing: 4px;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-desc {
  font-size: 16px;
  color: var(--ink-500);
  max-width: 540px;
  margin-bottom: 40px;
}
.hero-actions { display: flex; gap: 18px; flex-wrap: wrap; margin-bottom: 56px; }
.hero-stats { display: flex; align-items: center; gap: 34px; flex-wrap: wrap; }
.hero-stat-num { font-size: 26px; font-weight: 700; color: var(--ink-900); letter-spacing: 1px; }
.hero-stat-label { font-size: 13px; color: var(--ink-500); margin-top: 4px; letter-spacing: 2px; }
.hero-stat-divider { width: 1px; height: 42px; background: rgba(21, 34, 63, 0.12); }
.hero-scroll {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0.6;
  transition: opacity 0.3s;
}
.hero-scroll:hover { opacity: 1; }
.hero-scroll-mouse {
  display: block;
  width: 26px;
  height: 42px;
  border: 2px solid var(--ink-300);
  border-radius: 14px;
  position: relative;
}
.hero-scroll-mouse i {
  position: absolute;
  top: 8px;
  left: 50%;
  width: 4px;
  height: 8px;
  margin-left: -2px;
  border-radius: 4px;
  background: var(--gold-500);
  animation: scroll-dot 1.8s ease-in-out infinite;
}
@keyframes scroll-dot {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(12px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ============ 手机模型（通用） ============ */
.hero-visual { position: relative; display: flex; justify-content: center; }
.phone {
  width: 300px;
  height: 610px;
  border-radius: 44px;
  padding: 12px;
  background: linear-gradient(150deg, #33427a, #131d45 55%, #2a3868);
  box-shadow:
    0 40px 80px rgba(30, 50, 110, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.25),
    0 0 0 1px rgba(255, 255, 255, 0.35);
  position: relative;
}
.phone-hero { transform: rotate(3deg); animation: phone-float 6s ease-in-out infinite; }
@keyframes phone-float {
  0%, 100% { transform: rotate(3deg) translateY(0); }
  50% { transform: rotate(3deg) translateY(-14px); }
}
.phone-notch {
  position: absolute;
  top: 22px;
  left: 50%;
  transform: translateX(-50%);
  width: 108px;
  height: 24px;
  background: #0a1029;
  border-radius: 14px;
  z-index: 3;
}
.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 34px;
  background: linear-gradient(180deg, #101c42 0%, #0a1330 100%);
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
}
.ui-statusbar {
  display: flex;
  justify-content: space-between;
  padding: 14px 24px 6px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 600;
}
.ui-statusbar-icons { letter-spacing: 2px; font-size: 9px; }
.ui-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px 12px;
}
.ui-nav-back { color: rgba(255, 255, 255, 0.85); font-size: 22px; width: 24px; }
.ui-nav-name { color: #fff; font-size: 15px; font-weight: 600; letter-spacing: 2px; }
.ui-nav-space { width: 24px; }

/* 扫码界面 */
.ui-scan-area { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 22px; padding: 0 20px; }
.ui-scan-frame {
  width: 180px;
  height: 180px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.03);
}
.ui-corner { position: absolute; width: 26px; height: 26px; border: 3px solid var(--gold-400); }
.ui-c1 { top: 0; left: 0; border-right: none; border-bottom: none; border-radius: 8px 0 0 0; }
.ui-c2 { top: 0; right: 0; border-left: none; border-bottom: none; border-radius: 0 8px 0 0; }
.ui-c3 { bottom: 0; left: 0; border-right: none; border-top: none; border-radius: 0 0 0 8px; }
.ui-c4 { bottom: 0; right: 0; border-left: none; border-top: none; border-radius: 0 0 8px 0; }
.ui-scan-line {
  position: absolute;
  left: 10px;
  right: 10px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold-300), transparent);
  box-shadow: 0 0 14px rgba(238, 194, 106, 0.8);
  animation: scan-move 2.6s ease-in-out infinite;
}
@keyframes scan-move {
  0%, 100% { top: 14px; }
  50% { top: calc(100% - 16px); }
}
.ui-barcode { display: flex; align-items: flex-end; gap: 3px; height: 64px; opacity: 0.85; }
.ui-barcode i { width: 2px; background: rgba(255, 255, 255, 0.8); border-radius: 1px; }
.ui-barcode i:nth-child(3n) { width: 4px; }
.ui-barcode i:nth-child(4n) { width: 1px; }
.ui-barcode i:nth-child(odd) { height: 100%; }
.ui-barcode i:nth-child(even) { height: 82%; }
.ui-scan-tip { font-size: 12px; color: rgba(230, 236, 251, 0.55); letter-spacing: 2px; }
.ui-result-card {
  margin: 0 14px 18px;
  padding: 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.09);
  backdrop-filter: blur(8px);
  animation: card-rise 0.9s ease both 0.6s;
}
@keyframes card-rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}
.ui-result-head { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.ui-result-thumb {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, #f0d8a8, #c99a52);
  flex-shrink: 0;
}
.ui-result-info { flex: 1; min-width: 0; }
.ui-result-name { font-size: 13px; color: #fff; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ui-result-rating { display: inline-block; margin-top: 4px; font-size: 10px; padding: 2px 8px; border-radius: 999px; font-weight: 600; }
.ui-rating-a { background: rgba(52, 199, 123, 0.18); color: #6fe3a5; border: 1px solid rgba(52, 199, 123, 0.4); }
.ui-result-arrow { color: rgba(255, 255, 255, 0.4); font-size: 18px; }
.ui-result-tags { display: flex; gap: 8px; }
.ui-tag { font-size: 10px; padding: 3px 9px; border-radius: 6px; }
.ui-tag-safe { background: rgba(52, 199, 123, 0.14); color: #6fe3a5; }
.ui-tag-info { background: rgba(110, 168, 255, 0.14); color: #9cc3ff; }
.ui-tag-warn { background: rgba(245, 166, 35, 0.16); color: #ffc668; }

.hero-orbit { position: absolute; color: var(--gold-500); animation: twinkle 3s ease-in-out infinite; }
.hero-orbit span { display: block; font-size: 22px; text-shadow: 0 0 16px rgba(224, 154, 46, 0.55); }
.hero-orbit-1 { top: 6%; left: 4%; animation-delay: 0s; }
.hero-orbit-2 { bottom: 14%; left: -4%; animation-delay: 1.1s; }
.hero-orbit-3 { top: 20%; right: 2%; animation-delay: 2s; color: var(--blue-500); }
.hero-orbit-3 span { font-size: 16px; text-shadow: 0 0 14px rgba(59, 124, 248, 0.5); }
@keyframes twinkle {
  0%, 100% { opacity: 0.3; transform: scale(0.85); }
  50% { opacity: 1; transform: scale(1.15); }
}

/* ============ 通用 Section ============ */
.section { position: relative; padding: 110px 0; }
.section-dark {
  background:
    radial-gradient(ellipse 55% 38% at 88% 8%, rgba(59, 124, 248, 0.09), transparent 60%),
    radial-gradient(ellipse 45% 34% at 6% 92%, rgba(239, 179, 82, 0.09), transparent 60%),
    linear-gradient(180deg, rgba(248, 251, 255, 0.5) 0%, rgba(238, 245, 255, 0.7) 55%, rgba(248, 251, 255, 0.5) 100%);
}
.section-light {
  background:
    radial-gradient(ellipse 60% 40% at 85% 10%, rgba(59, 124, 248, 0.07), transparent 60%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.6) 0%, rgba(238, 245, 255, 0.65) 100%);
}
.section-head { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 5px;
  color: var(--blue-600);
  margin-bottom: 16px;
  padding: 6px 18px;
  border-radius: 999px;
  border: 1px solid rgba(59, 124, 248, 0.32);
  background: rgba(59, 124, 248, 0.07);
}
.section-tag-dark {
  color: var(--gold-600);
  border-color: rgba(224, 154, 46, 0.4);
  background: rgba(239, 179, 82, 0.12);
}
.section-title {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: 3px;
  background: linear-gradient(120deg, var(--ink-900), var(--blue-600));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 16px;
}
.section-title-dark {
  background: linear-gradient(120deg, var(--ink-900), var(--blue-700));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.section-sub { font-size: 16px; color: var(--ink-500); max-width: 620px; margin: 0 auto; }
.section-sub-dark { color: var(--ink-500); }

/* ============ 核心功能 ============ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  position: relative;
  padding: 38px 28px 30px;
  border-radius: var(--radius-lg);
  background: #ffffff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transition: transform 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(239, 179, 82, 0.18), transparent 70%);
  transition: transform 0.5s ease;
}
.feature-card:hover {
  transform: translateY(-8px);
  border-color: rgba(59, 124, 248, 0.45);
  box-shadow: var(--shadow-lift);
}
.feature-card:hover::before { transform: scale(1.6); }
.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}
.feature-icon-blue { background: linear-gradient(135deg, rgba(59, 124, 248, 0.16), rgba(59, 124, 248, 0.06)); color: var(--blue-500); border: 1px solid rgba(59, 124, 248, 0.28); }
.feature-icon-gold { background: linear-gradient(135deg, rgba(239, 179, 82, 0.2), rgba(239, 179, 82, 0.06)); color: var(--gold-500); border: 1px solid rgba(239, 179, 82, 0.35); }
.feature-icon-green { background: linear-gradient(135deg, rgba(31, 181, 115, 0.14), rgba(31, 181, 115, 0.05)); color: var(--green); border: 1px solid rgba(31, 181, 115, 0.3); }
.feature-icon-purple { background: linear-gradient(135deg, rgba(148, 108, 245, 0.14), rgba(148, 108, 245, 0.05)); color: #8a63e8; border: 1px solid rgba(148, 108, 245, 0.3); }
.feature-title { font-size: 19px; font-weight: 700; color: var(--ink-900); margin-bottom: 12px; letter-spacing: 1px; }
.feature-desc { font-size: 14px; color: var(--ink-500); line-height: 1.8; margin-bottom: 20px; }
.feature-foot {
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--gold-600);
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

/* ============ 使用流程 ============ */
.flow-steps { display: flex; align-items: stretch; justify-content: center; gap: 8px; }
.flow-step {
  position: relative;
  flex: 1;
  max-width: 320px;
  padding: 48px 30px 40px;
  border-radius: var(--radius-lg);
  background: #ffffff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  text-align: center;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.flow-step:hover { transform: translateY(-8px); box-shadow: var(--shadow-lift); }
.flow-num {
  position: absolute;
  top: 18px;
  right: 22px;
  font-size: 40px;
  font-weight: 800;
  font-style: italic;
  color: rgba(224, 154, 46, 0.32);
  line-height: 1;
}
.flow-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-600);
  background: linear-gradient(140deg, #f2f7ff, #dcebff);
  box-shadow: inset 0 2px 6px rgba(255, 255, 255, 0.9), 0 10px 24px rgba(59, 124, 248, 0.16);
}
.flow-title { font-size: 19px; font-weight: 700; margin-bottom: 10px; letter-spacing: 1px; color: var(--ink-900); }
.flow-desc { font-size: 14px; color: var(--ink-500); }
.flow-arrow { display: flex; align-items: center; padding: 0 6px; }
.flow-arrow span {
  width: 44px;
  height: 2px;
  background: linear-gradient(90deg, rgba(224, 154, 46, 0.15), var(--gold-400), rgba(224, 154, 46, 0.15));
  position: relative;
}
.flow-arrow span::after {
  content: "";
  position: absolute;
  right: -2px;
  top: -4px;
  border: 5px solid transparent;
  border-left-color: var(--gold-400);
}

/* ============ 产品展示 ============ */
.showcase {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 70px;
  align-items: center;
}
.showcase-phone { display: flex; justify-content: center; }
.showcase-phone .phone { transform: rotate(-3deg); }
.showcase-list { display: flex; flex-direction: column; gap: 18px; }
.showcase-item {
  display: flex;
  gap: 18px;
  padding: 22px 24px;
  border-radius: var(--radius-md);
  background: #ffffff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}
.showcase-item:hover {
  transform: translateX(10px);
  border-color: rgba(59, 124, 248, 0.4);
  box-shadow: var(--shadow-lift);
}
.showcase-item-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.showcase-item-icon-gold { background: rgba(239, 179, 82, 0.14); color: var(--gold-500); border: 1px solid rgba(239, 179, 82, 0.35); }
.showcase-item-icon-blue { background: rgba(59, 124, 248, 0.1); color: var(--blue-500); border: 1px solid rgba(59, 124, 248, 0.3); }
.showcase-item-icon-green { background: rgba(31, 181, 115, 0.1); color: var(--green); border: 1px solid rgba(31, 181, 115, 0.3); }
.showcase-item-icon-purple { background: rgba(148, 108, 245, 0.1); color: #8a63e8; border: 1px solid rgba(148, 108, 245, 0.3); }
.showcase-item-icon-red { background: rgba(255, 107, 94, 0.09); color: var(--red); border: 1px solid rgba(255, 107, 94, 0.3); }
.showcase-item-title { font-size: 17px; font-weight: 700; color: var(--ink-900); margin-bottom: 6px; letter-spacing: 1px; }
.showcase-item-desc { font-size: 14px; color: var(--ink-500); }

/* 详情页手机 UI */
.phone-screen-detail { background: linear-gradient(180deg, #f2f5fb 0%, #ffffff 30%); }
.phone-screen-detail .ui-statusbar { color: var(--ink-900); }
.phone-screen-detail .ui-nav-back { color: var(--ink-900); }
.phone-screen-detail .ui-nav-name { color: var(--ink-900); }
.ui-detail-hero { text-align: center; padding: 6px 16px 14px; }
.ui-detail-img {
  width: 96px;
  height: 96px;
  margin: 0 auto 10px;
  border-radius: 20px;
  background: linear-gradient(135deg, #f7e3bd, #e0b877 60%, #c99a52);
  box-shadow: 0 10px 22px rgba(201, 154, 82, 0.35);
  position: relative;
  overflow: hidden;
}
.ui-detail-img::after {
  content: "★";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.75);
  font-size: 34px;
}
.ui-detail-name { font-size: 14px; font-weight: 700; color: var(--ink-900); }
.ui-detail-barcode { font-size: 10px; color: var(--ink-500); margin-top: 3px; letter-spacing: 1px; }
.ui-score-card {
  margin: 0 12px 10px;
  padding: 14px;
  border-radius: 14px;
  background: linear-gradient(135deg, #0f1c44, #16295c);
  display: flex;
  align-items: center;
  gap: 14px;
}
.ui-score-gauge { position: relative; width: 84px; height: 84px; flex-shrink: 0; }
.ui-score-arc {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 220deg, var(--gold-400) 0deg, var(--green) 190deg, rgba(255, 255, 255, 0.12) 190deg);
  -webkit-mask: radial-gradient(circle, transparent 55%, #000 56%);
  mask: radial-gradient(circle, transparent 55%, #000 56%);
}
.ui-score-value {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  padding-bottom: 10px;
}
.ui-score-label {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  text-align: center;
  font-size: 9px;
  color: rgba(230, 236, 251, 0.6);
  letter-spacing: 1px;
}
.ui-score-meta { flex: 1; }
.ui-score-badge { display: inline-block; font-size: 10px; font-weight: 700; padding: 3px 10px; border-radius: 999px; margin-bottom: 8px; }
.ui-score-line { font-size: 10.5px; color: rgba(230, 236, 251, 0.72); line-height: 1.9; }
.ui-additive-card { margin: 0 12px 10px; padding: 12px 14px; border-radius: 14px; background: #fff; border: 1px solid #eef1f8; }
.ui-additive-title { font-size: 11px; font-weight: 700; color: var(--ink-900); margin-bottom: 8px; letter-spacing: 1px; }
.ui-additive-row { display: flex; align-items: center; gap: 8px; padding: 5px 0; border-top: 1px dashed #f0f2f8; }
.ui-additive-dot { width: 7px; height: 7px; border-radius: 50%; }
.ui-dot-safe { background: var(--green); box-shadow: 0 0 6px rgba(52, 199, 123, 0.6); }
.ui-dot-warn { background: var(--amber); box-shadow: 0 0 6px rgba(245, 166, 35, 0.6); }
.ui-additive-name { flex: 1; font-size: 11px; color: var(--ink-700); }
.ui-additive-tag { font-size: 9px; padding: 2px 8px; border-radius: 6px; }
.ui-tip-card {
  margin: 0 12px 16px;
  padding: 10px 12px;
  border-radius: 12px;
  background: linear-gradient(135deg, #fff7e8, #ffefd2);
  border: 1px solid #f5dcae;
}
.ui-tip-badge {
  display: inline-block;
  font-size: 9px;
  font-weight: 700;
  color: #a06a10;
  background: rgba(245, 166, 35, 0.18);
  padding: 2px 8px;
  border-radius: 6px;
  margin-bottom: 5px;
}
.ui-tip-text { font-size: 10px; color: #8a6420; line-height: 1.6; }

/* ============ 全端覆盖 ============ */
.platform-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.platform-card {
  padding: 44px 26px 38px;
  border-radius: var(--radius-lg);
  background: #ffffff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.platform-card::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--gold-400), var(--blue-500));
  opacity: 0;
  transition: opacity 0.4s ease;
}
.platform-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-lift); }
.platform-card:hover::before { opacity: 1; }
.platform-icon {
  width: 76px;
  height: 76px;
  margin: 0 auto 22px;
  border-radius: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-600);
  background: linear-gradient(140deg, #f2f7ff, #dcebff);
  transition: transform 0.4s ease, color 0.4s ease, background 0.4s ease;
}
.platform-card:hover .platform-icon {
  transform: scale(1.08) rotate(-4deg);
  color: #fff;
  background: linear-gradient(140deg, var(--blue-400), var(--blue-600));
}
.platform-title { font-size: 19px; font-weight: 700; margin-bottom: 10px; letter-spacing: 1px; color: var(--ink-900); }
.platform-desc { font-size: 13.5px; color: var(--ink-500); line-height: 1.9; }

/* ============ FAQ ============ */
.faq-list { display: flex; flex-direction: column; gap: 16px; }
.faq-item {
  border-radius: var(--radius-md);
  background: #ffffff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transition: border-color 0.35s ease, box-shadow 0.35s ease;
}
.faq-item.open { border-color: rgba(59, 124, 248, 0.5); box-shadow: var(--shadow-lift); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 26px;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--ink-900);
  text-align: left;
  letter-spacing: 0.5px;
}
.faq-arrow {
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--blue-500);
  border-bottom: 2px solid var(--blue-500);
  transform: rotate(45deg);
  transition: transform 0.35s ease;
  flex-shrink: 0;
}
.faq-item.open .faq-arrow { transform: rotate(-135deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.45s ease; }
.faq-a p { padding: 0 26px 24px; font-size: 14.5px; color: var(--ink-500); }

/* ============ 下载区 ============ */
.section-download {
  padding: 120px 0 130px;
  background:
    radial-gradient(ellipse 65% 70% at 50% 0%, rgba(59, 124, 248, 0.12), transparent 65%),
    linear-gradient(180deg, rgba(248, 251, 255, 0.5), rgba(234, 243, 255, 0.75));
}
.download-card {
  position: relative;
  padding: 80px 40px 70px;
  border-radius: 32px;
  text-align: center;
  background:
    radial-gradient(ellipse 60% 90% at 50% -10%, rgba(246, 206, 126, 0.3), transparent 70%),
    linear-gradient(160deg, #ffffff, #f2f8ff);
  border: 1px solid var(--sky-300);
  box-shadow: var(--shadow-lift);
  overflow: hidden;
}
.download-stars span {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold-400);
  box-shadow: 0 0 12px rgba(239, 179, 82, 0.8);
  animation: twinkle 3.2s ease-in-out infinite;
}
.download-stars span:nth-child(1) { top: 18%; left: 12%; }
.download-stars span:nth-child(2) { top: 30%; right: 14%; animation-delay: 0.8s; }
.download-stars span:nth-child(3) { bottom: 24%; left: 20%; animation-delay: 1.6s; background: var(--blue-500); box-shadow: 0 0 12px rgba(59, 124, 248, 0.7); }
.download-stars span:nth-child(4) { bottom: 30%; right: 22%; animation-delay: 2.2s; width: 4px; height: 4px; }
.download-stars span:nth-child(5) { top: 55%; left: 6%; animation-delay: 1.1s; width: 4px; height: 4px; background: var(--blue-400); box-shadow: 0 0 10px rgba(91, 147, 245, 0.7); }
.download-logo {
  width: 96px;
  height: 96px;
  border-radius: 26px;
  object-fit: cover;
  margin: 0 auto 28px;
  box-shadow: 0 18px 40px rgba(224, 154, 46, 0.3), 0 0 0 1px rgba(59, 124, 248, 0.12);
}
.download-title {
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--ink-900);
  margin-bottom: 12px;
}
.download-sub { font-size: 16px; color: var(--ink-500); margin-bottom: 44px; letter-spacing: 2px; }
.download-actions { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
.dl-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 26px;
  border-radius: 16px;
  background: #ffffff;
  border: 1px solid var(--line);
  color: var(--ink-900);
  box-shadow: var(--shadow-soft);
  transition: transform 0.35s ease, border-color 0.35s ease, background 0.35s ease, box-shadow 0.35s ease;
}
.dl-btn:hover {
  transform: translateY(-4px);
  border-color: rgba(239, 179, 82, 0.6);
  background: #fffaf0;
  box-shadow: var(--shadow-lift);
}
.dl-btn svg { color: var(--gold-500); }
.dl-btn span { display: flex; flex-direction: column; text-align: left; line-height: 1.35; }
.dl-btn small { font-size: 11px; color: var(--ink-500); }
.dl-btn strong { font-size: 15px; font-weight: 700; letter-spacing: 0.5px; }

/* ============ 页脚 ============ */
.footer {
  position: relative;
  z-index: 1;
  background: #f0f5fc;
  border-top: 1px solid var(--line);
  padding: 70px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding-bottom: 50px;
}
.footer-logo-row { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-logo { width: 44px; height: 44px; border-radius: 13px; object-fit: cover; }
.footer-name { font-size: 20px; font-weight: 700; letter-spacing: 2px; color: var(--ink-900); }
.footer-slogan { font-size: 14px; color: var(--ink-500); letter-spacing: 2px; }
.footer-col { display: flex; flex-direction: column; gap: 12px; }
.footer-col-title { font-size: 15px; font-weight: 700; color: var(--ink-900); letter-spacing: 2px; margin-bottom: 6px; }
.footer-link { font-size: 14px; color: var(--ink-500); transition: color 0.25s ease, transform 0.25s ease; }
a.footer-link:hover { color: var(--blue-600); transform: translateX(4px); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  color: #94a2bd;
}

/* ============ 滚动入场动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}

/* ============ 响应式 ============ */
@media (max-width: 1080px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; gap: 70px; }
  .hero-copy { text-align: center; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-actions, .hero-stats { justify-content: center; }
  .showcase { grid-template-columns: 1fr; gap: 60px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(18px);
    padding: 18px 6%;
    gap: 4px;
    transform: translateY(-16px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s ease, opacity 0.35s ease;
    box-shadow: 0 20px 40px rgba(37, 68, 138, 0.12);
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-link { padding: 13px 10px; }
  .nav-cta { display: none; }
  .nav-burger { display: flex; margin-left: auto; }
  .nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-burger.open span:nth-child(2) { opacity: 0; }
  .nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .flow-steps { flex-direction: column; align-items: center; }
  .flow-step { width: 100%; }
  .flow-arrow { transform: rotate(90deg); padding: 10px 0; }
}

@media (max-width: 620px) {
  .section { padding: 80px 0; }
  .hero { padding: 120px 0 70px; }
  .feature-grid { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; }
  .phone { width: 260px; height: 530px; }
  .shield { width: 300px; height: 300px; }
  .shield-core { width: 136px; height: 136px; }
  .download-actions { flex-direction: column; align-items: center; }
  .dl-btn { width: 100%; max-width: 320px; justify-content: center; }
  .hero-stats { gap: 22px; }
  .hero-stat-divider { display: none; }
}