/* ==============================================
   155黑料 · 全站视觉系统
   概念：深夜霓虹 × 内容剧场
   作者:Loomy 智能办公助手
   ============================================== */

/* ---------- 颜色与字体变量 ---------- */
:root {
  /* 背景层级 */
  --bg-base: #0a0a14;
  --bg-elevated: #13131f;
  --bg-card: #1b1b2a;
  --bg-card-2: #232336;

  /* 主题色 */
  --brand-orange: #ff5722;
  --brand-pink: #e91e63;
  --brand-violet: #7c3aed;
  --brand-cyan: #00e5ff;

  /* 文字 */
  --text-primary: #f5f5f7;
  --text-secondary: #b8b8c8;
  --text-muted: #7a7a8c;

  /* 渐变 */
  --gradient-fire: linear-gradient(135deg, #ff5722 0%, #e91e63 100%);
  --gradient-neon: linear-gradient(135deg, #7c3aed 0%, #e91e63 50%, #ff5722 100%);
  --gradient-cyber: linear-gradient(135deg, #00e5ff 0%, #7c3aed 100%);
  --gradient-soft: linear-gradient(135deg, rgba(255,87,34,0.15) 0%, rgba(233,30,99,0.15) 100%);

  /* 边框 / 阴影 */
  --border-subtle: 1px solid rgba(255, 255, 255, 0.08);
  --border-bright: 1px solid rgba(255, 87, 34, 0.4);
  --shadow-glow: 0 8px 32px rgba(255, 87, 34, 0.25);
  --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.4);

  /* 字体 */
  --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", "Segoe UI",
    system-ui, -apple-system, sans-serif;
  --font-display: "Plus Jakarta Sans", "PingFang SC", "Microsoft YaHei",
    system-ui, sans-serif;

  /* 间距 */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 32px;

  /* 容器 */
  --max-width: 1240px;
  --gutter: 24px;

  /* 动效 */
  --t-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --t-med: 0.32s cubic-bezier(0.4, 0, 0.2, 1);
  --t-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- 基础重置 ---------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse 600px 600px at 10% -10%, rgba(124, 58, 237, 0.18), transparent 60%),
    radial-gradient(ellipse 500px 500px at 90% 10%, rgba(255, 87, 34, 0.15), transparent 60%),
    radial-gradient(ellipse 700px 700px at 50% 110%, rgba(233, 30, 99, 0.12), transparent 60%);
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t-fast);
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul {
  list-style: none;
}

/* ---------- 排版 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.h-display {
  font-size: clamp(2.4rem, 6vw, 5.2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
}

.h-1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
}

.h-2 {
  font-size: clamp(1.5rem, 2.6vw, 2.2rem);
}

.h-3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

p {
  color: var(--text-secondary);
}

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

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

/* ---------- 通用容器 ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

section {
  padding: 80px 0;
  position: relative;
}

@media (max-width: 768px) {
  section {
    padding: 56px 0;
  }
}

/* ---------- 导航栏 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  background: rgba(10, 10, 20, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gradient-fire);
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 1rem;
  color: white;
  box-shadow: 0 4px 14px rgba(255, 87, 34, 0.4);
  position: relative;
  overflow: hidden;
}

.logo-mark::after {
  content: "";
  position: absolute;
  inset: -2px;
  background: conic-gradient(from 0deg, transparent, rgba(255, 255, 255, 0.4), transparent 30%);
  animation: spin 4s linear infinite;
  z-index: 0;
}

.logo-mark span {
  position: relative;
  z-index: 1;
}

.logo-text small {
  display: block;
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.2em;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  gap: 36px;
  align-items: center;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  padding: 8px 0;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--gradient-fire);
  transition: width var(--t-med);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  display: flex;
  gap: 12px;
  align-items: center;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--t-med);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-fire);
  color: white;
  box-shadow: 0 6px 20px rgba(255, 87, 34, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(255, 87, 34, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 10px 14px;
}

.btn-ghost:hover {
  color: var(--text-primary);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.05rem;
}

/* ---------- 通用排版与卡片 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255, 87, 34, 0.12);
  color: var(--brand-orange);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid rgba(255, 87, 34, 0.25);
}

.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--brand-orange);
  box-shadow: 0 0 8px var(--brand-orange);
  animation: pulse 1.6s ease-in-out infinite;
}

.section-head {
  margin-bottom: 48px;
}

.section-head .eyebrow {
  margin-bottom: 16px;
}

.section-head p {
  max-width: 640px;
  font-size: 1.05rem;
  margin-top: 14px;
  color: var(--text-secondary);
}

.section-head h2 {
  margin-top: 14px;
}

.section-head.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-head.center p {
  margin-left: auto;
  margin-right: auto;
}

.card {
  background: var(--bg-card);
  border-radius: var(--r-lg);
  border: var(--border-subtle);
  overflow: hidden;
  transition: transform var(--t-med), border-color var(--t-med);
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 87, 34, 0.3);
}

/* ---------- Hero ---------- */
.hero {
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.hero h1 .accent {
  display: inline-block;
}

.hero p.lead {
  font-size: 1.15rem;
  max-width: 540px;
  margin: 24px 0 36px;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

.hero-stats {
  display: flex;
  gap: 36px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-stat .num {
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-weight: 800;
  background: var(--gradient-fire);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.03em;
}

.hero-stat .lbl {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Hero 视觉 */
.hero-visual {
  position: relative;
  height: 520px;
}

.float-card {
  position: absolute;
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--t-med);
}

.float-card:hover {
  transform: scale(1.03) rotate(0deg) !important;
  z-index: 5;
}

.float-card .thumb {
  aspect-ratio: 16 / 10;
  position: relative;
  overflow: hidden;
}

.float-card .thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.7));
}

.float-card .thumb .play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.95);
  display: grid;
  place-items: center;
  color: var(--bg-base);
  z-index: 2;
}

.float-card .info {
  padding: 12px 14px;
}

.float-card .info h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.float-card .info span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.fc-1 {
  width: 70%;
  top: 0;
  left: 0;
  transform: rotate(-3deg);
}

.fc-2 {
  width: 55%;
  top: 40px;
  right: 0;
  transform: rotate(4deg);
}

.fc-3 {
  width: 60%;
  bottom: 40px;
  left: 10%;
  transform: rotate(-2deg);
}

.fc-4 {
  width: 45%;
  bottom: 0;
  right: 8%;
  transform: rotate(3deg);
}

.float-badge {
  position: absolute;
  top: 50%;
  left: -8%;
  transform: translateY(-50%);
  background: var(--gradient-fire);
  color: white;
  padding: 14px 18px;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  box-shadow: var(--shadow-glow);
  z-index: 6;
  animation: floatUp 3s ease-in-out infinite;
}

.float-badge .ico {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.2);
  display: grid;
  place-items: center;
  font-size: 1.1rem;
}

.float-badge small {
  display: block;
  font-size: 0.7rem;
  font-weight: 500;
  opacity: 0.9;
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-visual {
    height: 380px;
    margin-top: 12px;
  }
  .fc-1, .fc-2, .fc-3, .fc-4 {
    width: 65%;
  }
}

@media (max-width: 580px) {
  .hero {
    padding: 40px 0 24px;
  }
  .hero-stats {
    gap: 22px;
    flex-wrap: wrap;
  }
  .hero-stat .num {
    font-size: 1.5rem;
  }
  .hero-visual {
    height: 320px;
  }
}

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

.cards-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.cards-grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 980px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .cards-grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 580px) {
  .cards-grid,
  .cards-grid-3,
  .cards-grid-2 { grid-template-columns: 1fr; }
}

/* ---------- 视频卡片 ---------- */
.video-card {
  position: relative;
  display: block;
  cursor: pointer;
}

.video-card .thumb {
  aspect-ratio: 16 / 10;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg-card-2), var(--bg-card));
}

.video-card .thumb-bg {
  position: absolute;
  inset: 0;
  transition: transform var(--t-slow);
}

.video-card:hover .thumb-bg {
  transform: scale(1.08);
}

.video-card .duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  padding: 3px 8px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  font-size: 0.72rem;
  border-radius: 4px;
  font-weight: 600;
  z-index: 2;
}

.video-card .badge {
  position: absolute;
  top: 10px;
  left: 10px;
  padding: 3px 9px;
  background: var(--gradient-fire);
  color: white;
  font-size: 0.7rem;
  border-radius: 4px;
  font-weight: 700;
  letter-spacing: 0.05em;
  z-index: 2;
}

.video-card .play-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.25);
  opacity: 0;
  transition: opacity var(--t-med);
  z-index: 1;
}

.video-card:hover .play-overlay {
  opacity: 1;
}

.video-card .play-overlay span {
  width: 56px;
  height: 56px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.95);
  display: grid;
  place-items: center;
  color: var(--bg-base);
  transition: transform var(--t-med);
}

.video-card:hover .play-overlay span {
  transform: scale(1.1);
}

.video-card .meta {
  padding: 16px 4px 6px;
}

.video-card .meta h3 {
  font-size: 1.02rem;
  font-weight: 600;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-card .meta .info {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.video-card .meta .author {
  color: var(--brand-orange);
  font-weight: 500;
}

/* ---------- 分类标签 ---------- */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.chip {
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--t-fast);
}

.chip:hover {
  color: white;
  border-color: rgba(255, 87, 34, 0.3);
}

.chip.active {
  background: var(--gradient-fire);
  border-color: transparent;
  color: white;
  box-shadow: 0 4px 14px rgba(255, 87, 34, 0.3);
}

/* ---------- 分类区 ---------- */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}

.cat-tile {
  position: relative;
  background: var(--bg-card);
  border-radius: var(--r-lg);
  padding: 28px 22px;
  border: var(--border-subtle);
  overflow: hidden;
  transition: all var(--t-med);
}

.cat-tile::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-fire);
  opacity: 0;
  transition: opacity var(--t-med);
  z-index: 0;
}

.cat-tile:hover {
  border-color: transparent;
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.cat-tile:hover::before {
  opacity: 1;
}

.cat-tile > * {
  position: relative;
  z-index: 1;
}

.cat-tile .ico {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--gradient-soft);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
  transition: all var(--t-med);
}

.cat-tile:hover .ico {
  background: rgba(255, 255, 255, 0.2);
}

.cat-tile h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.cat-tile p {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--t-med);
}

.cat-tile:hover p {
  color: rgba(255, 255, 255, 0.85);
}

.cat-tile .count {
  display: block;
  margin-top: 14px;
  font-size: 0.78rem;
  color: var(--brand-orange);
  font-weight: 600;
}

.cat-tile:hover .count {
  color: white;
}

@media (max-width: 980px) {
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 580px) {
  .cat-grid { grid-template-columns: 1fr; }
}

/* ---------- 大数字展示 ---------- */
.bignum-section {
  padding: 60px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.bignum-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}

.bignum {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.bignum .num {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  font-weight: 900;
  background: var(--gradient-fire);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.04em;
  line-height: 1;
}

.bignum .lbl {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: 8px;
}

@media (max-width: 768px) {
  .bignum-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}

/* ---------- App 横幅 ---------- */
.app-section {
  position: relative;
  background: var(--bg-elevated);
  border-radius: 32px;
  margin: 0 24px;
  padding: 64px 48px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.app-section::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: var(--gradient-fire);
  filter: blur(120px);
  opacity: 0.4;
  z-index: 0;
}

.app-section::after {
  content: "";
  position: absolute;
  bottom: -50%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: var(--gradient-cyber);
  filter: blur(140px);
  opacity: 0.3;
  z-index: 0;
}

.app-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.app-section h2 {
  margin-bottom: 16px;
}

.app-section p {
  font-size: 1.05rem;
  margin-bottom: 28px;
  max-width: 480px;
}

.app-features {
  list-style: none;
  display: grid;
  gap: 12px;
  margin-bottom: 32px;
}

.app-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.app-features li::before {
  content: "✓";
  color: var(--brand-orange);
  font-weight: 700;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  background: rgba(255, 87, 34, 0.15);
  display: grid;
  place-items: center;
  font-size: 0.78rem;
  flex-shrink: 0;
}

.app-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.app-store-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  background: #000;
  color: white;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--t-med);
}

.app-store-btn:hover {
  background: #111;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.app-store-btn .ico {
  font-size: 1.4rem;
}

.app-store-btn small {
  display: block;
  font-size: 0.7rem;
  opacity: 0.7;
}

.app-store-btn strong {
  display: block;
  font-size: 1rem;
  font-weight: 700;
}

.app-mock {
  position: relative;
  height: 400px;
  display: grid;
  place-items: center;
}

.phone-frame {
  width: 240px;
  height: 480px;
  background: linear-gradient(180deg, #2a2a3a, #0a0a14);
  border-radius: 36px;
  border: 4px solid rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
  transform: rotate(-5deg);
}

.phone-frame .notch {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 22px;
  background: black;
  border-radius: 999px;
  z-index: 2;
}

.phone-screen {
  position: absolute;
  inset: 12px;
  border-radius: 28px;
  background: linear-gradient(180deg, #1a1a2a 0%, #0a0a14 100%);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.phone-screen .screen-head {
  padding: 36px 16px 14px;
  background: var(--gradient-fire);
  color: white;
}

.phone-screen .screen-head h4 {
  font-size: 0.85rem;
  font-weight: 700;
}

.phone-screen .screen-head p {
  font-size: 0.65rem;
  margin-top: 2px;
  opacity: 0.85;
  color: white;
}

.phone-screen .screen-list {
  flex: 1;
  padding: 8px;
  display: grid;
  gap: 6px;
}

.phone-screen .screen-item {
  height: 60px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  font-size: 0.7rem;
}

.phone-screen .screen-item .t {
  width: 44px;
  height: 44px;
  border-radius: 6px;
  background: var(--gradient-fire);
  flex-shrink: 0;
}

.phone-screen .screen-item .t.alt1 { background: var(--gradient-cyber); }
.phone-screen .screen-item .t.alt2 { background: linear-gradient(135deg, #7c3aed, #e91e63); }

.phone-screen .screen-item .text {
  flex: 1;
}

.phone-screen .screen-item .text strong {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  color: white;
}

.phone-screen .screen-item .text small {
  font-size: 0.6rem;
  color: var(--text-muted);
}

@media (max-width: 980px) {
  .app-section { margin: 0 16px; padding: 48px 28px; border-radius: 24px; }
  .app-grid { grid-template-columns: 1fr; }
  .app-mock { height: 360px; }
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--bg-elevated);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 64px 0 28px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 18px;
  font-weight: 600;
}

.footer p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 16px;
  max-width: 320px;
}

.footer ul li {
  margin-bottom: 10px;
}

.footer ul a {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.footer ul a:hover {
  color: var(--brand-orange);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 14px;
}

.footer-bottom .socials {
  display: flex;
  gap: 12px;
}

.footer-bottom .socials a {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  display: grid;
  place-items: center;
  transition: all var(--t-fast);
}

.footer-bottom .socials a:hover {
  background: var(--brand-orange);
  color: white;
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- 热榜相关 ---------- */
.rank-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.rank-list {
  display: grid;
  gap: 14px;
}

.rank-item {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 18px 22px;
  background: var(--bg-card);
  border-radius: var(--r-lg);
  border: var(--border-subtle);
  transition: all var(--t-med);
}

.rank-item:hover {
  border-color: rgba(255, 87, 34, 0.3);
  transform: translateX(4px);
}

.rank-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  color: var(--text-muted);
  text-align: center;
  line-height: 1;
  letter-spacing: -0.04em;
}

.rank-item.top-1 .rank-num {
  background: var(--gradient-fire);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.rank-item.top-2 .rank-num,
.rank-item.top-3 .rank-num {
  color: var(--brand-pink);
}

.rank-content h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.rank-content p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.rank-content .tags {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.rank-content .tag {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
}

.rank-hot {
  text-align: right;
}

.rank-hot .num {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--brand-orange);
  letter-spacing: -0.02em;
}

.rank-hot small {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
}

@media (max-width: 580px) {
  .rank-item {
    grid-template-columns: 40px 1fr;
    gap: 14px;
    padding: 14px;
  }
  .rank-hot {
    grid-column: 2;
    text-align: left;
  }
  .rank-num {
    font-size: 1.5rem;
  }
}

/* 大字报 */
.bigpost {
  background: var(--gradient-fire);
  border-radius: 32px;
  padding: 60px 48px;
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
  color: white;
}

.bigpost::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.2), transparent 60%);
}

.bigpost-label {
  display: inline-block;
  background: rgba(0, 0, 0, 0.2);
  color: white;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: 24px;
}

.bigpost-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 900;
  margin-bottom: 16px;
  line-height: 1.15;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.bigpost-meta {
  display: flex;
  gap: 20px;
  font-size: 0.9rem;
  opacity: 0.95;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.bigpost-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

@media (max-width: 580px) {
  .bigpost { padding: 40px 24px; border-radius: 24px; }
}

/* ---------- 表单 ---------- */
.form-card {
  background: var(--bg-card);
  border-radius: var(--r-lg);
  padding: 32px;
  border: var(--border-subtle);
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 18px;
}

.form-row label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.form-row input,
.form-row select,
.form-row textarea {
  background: var(--bg-elevated);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: white;
  padding: 12px 14px;
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--t-fast);
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  border-color: var(--brand-orange);
}

.form-row textarea {
  min-height: 110px;
  resize: vertical;
}

/* ---------- FAQ ---------- */
.faq {
  display: grid;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border-radius: var(--r-md);
  border: var(--border-subtle);
  padding: 22px 26px;
  transition: all var(--t-fast);
}

.faq-item[open] {
  border-color: rgba(255, 87, 34, 0.3);
  background: linear-gradient(180deg, rgba(255, 87, 34, 0.04), transparent);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 1.02rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  width: 28px;
  height: 28px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  font-weight: 300;
  flex-shrink: 0;
  transition: all var(--t-fast);
}

.faq-item[open] summary::after {
  content: "−";
  background: var(--gradient-fire);
  color: white;
}

.faq-item p {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ---------- 移动端汉堡按钮 ---------- */
.hamburger {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  align-items: center;
  justify-content: center;
}

.hamburger span {
  width: 18px;
  height: 2px;
  background: white;
  position: relative;
  transition: all var(--t-fast);
}

.hamburger span::before,
.hamburger span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: white;
  transition: all var(--t-fast);
}

.hamburger span::before { top: -6px; }
.hamburger span::after { top: 6px; }

.hamburger.active span {
  background: transparent;
}

.hamburger.active span::before {
  top: 0;
  transform: rotate(45deg);
}

.hamburger.active span::after {
  top: 0;
  transform: rotate(-45deg);
}

@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-cta .btn:not(.btn-primary) { display: none; }
  .hamburger { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    padding: 16px 24px;
    align-items: stretch;
  }

  .nav-links.open a {
    padding: 14px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .nav-links.open a:last-child {
    border-bottom: none;
  }
}

/* ---------- 工具类 ---------- */
.text-center { text-align: center; }
.mt-12 { margin-top: 12px; }
.mt-24 { margin-top: 24px; }
.mt-48 { margin-top: 48px; }
.mb-0 { margin-bottom: 0; }

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }

/* ---------- 滚动动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--t-slow), transform 0.7s var(--t-slow);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 动画关键帧 ---------- */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

@keyframes floatUp {
  0%, 100% { transform: translateY(calc(-50% + 0px)); }
  50% { transform: translateY(calc(-50% - 8px)); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes marquee {
  0% { transform: translateY(0); opacity: 1; }
  20% { opacity: 1; }
  80% { opacity: 1; }
  100% { transform: translateY(-160px); opacity: 0; }
}

/* 滚动热榜 */
.ticker {
  background: var(--bg-card);
  border-radius: var(--r-lg);
  padding: 22px 24px;
  border: var(--border-subtle);
  overflow: hidden;
  position: relative;
  margin-bottom: 32px;
}

.ticker-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-weight: 700;
}

.ticker-title .live-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--brand-orange);
  box-shadow: 0 0 12px var(--brand-orange);
  animation: pulse 1.6s ease-in-out infinite;
}

.ticker-list {
  display: grid;
  gap: 10px;
  height: 240px;
  overflow: hidden;
  position: relative;
  -webkit-mask-image: linear-gradient(180deg, transparent, black 10%, black 90%, transparent);
  mask-image: linear-gradient(180deg, transparent, black 10%, black 90%, transparent);
}

.ticker-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  animation: marquee 8s linear forwards;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.ticker-item .num {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--brand-orange);
  min-width: 24px;
  font-size: 0.95rem;
}

.ticker-item .text {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.ticker-item .text strong {
  color: var(--text-primary);
  display: block;
  margin-bottom: 2px;
  font-weight: 600;
}

.ticker-item .text small {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ---------- 二维码 ---------- */
.qrcode {
  display: inline-block;
  padding: 14px;
  background: white;
  border-radius: 16px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.qrcode svg {
  width: 160px;
  height: 160px;
  display: block;
}

/* ---------- 团队 ---------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.team-card {
  background: var(--bg-card);
  border-radius: var(--r-lg);
  padding: 32px 24px;
  text-align: center;
  border: var(--border-subtle);
}

.team-avatar {
  width: 88px;
  height: 88px;
  border-radius: 999px;
  margin: 0 auto 18px;
  background: var(--gradient-fire);
  display: grid;
  place-items: center;
  font-size: 2rem;
  font-weight: 900;
  color: white;
  box-shadow: 0 10px 24px rgba(255, 87, 34, 0.3);
}

.team-card h3 {
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.team-card .role {
  font-size: 0.85rem;
  color: var(--brand-orange);
  margin-bottom: 12px;
  font-weight: 600;
}

.team-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .team-grid { grid-template-columns: 1fr; }
}

/* ---------- 价值卡片 ---------- */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.value-card {
  padding: 36px 28px;
  background: var(--bg-card);
  border-radius: var(--r-lg);
  border: var(--border-subtle);
  position: relative;
  overflow: hidden;
}

.value-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-fire);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-med);
}

.value-card:hover::before {
  transform: scaleX(1);
}

.value-card .ico {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--gradient-soft);
  display: grid;
  place-items: center;
  font-size: 1.7rem;
  margin-bottom: 22px;
}

.value-card h3 {
  font-size: 1.18rem;
  margin-bottom: 10px;
}

@media (max-width: 768px) {
  .value-grid { grid-template-columns: 1fr; }
}

/* ---------- 评价 ---------- */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.review {
  padding: 28px;
  background: var(--bg-card);
  border-radius: var(--r-lg);
  border: var(--border-subtle);
}

.review .stars {
  color: #ffc107;
  margin-bottom: 14px;
  font-size: 1.05rem;
}

.review p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 18px;
}

.review .user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review .user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: var(--gradient-cyber);
  display: grid;
  place-items: center;
  font-size: 0.95rem;
  font-weight: 700;
  color: white;
}

.review .user strong {
  font-size: 0.92rem;
  display: block;
}

.review .user small {
  font-size: 0.78rem;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .review-grid { grid-template-columns: 1fr; }
}

/* ---------- 视频缩略图虚拟渐变 ---------- */
/* 用渐变模拟缩略图，避免外部资源 */
.thumb-grad-1 { background: linear-gradient(135deg, #ff5722, #ff9800); }
.thumb-grad-2 { background: linear-gradient(135deg, #e91e63, #7c3aed); }
.thumb-grad-3 { background: linear-gradient(135deg, #00e5ff, #7c3aed); }
.thumb-grad-4 { background: linear-gradient(135deg, #f59e0b, #e91e63); }
.thumb-grad-5 { background: linear-gradient(135deg, #10b981, #00e5ff); }
.thumb-grad-6 { background: linear-gradient(135deg, #6366f1, #ec4899); }
.thumb-grad-7 { background: linear-gradient(135deg, #ef4444, #f59e0b); }
.thumb-grad-8 { background: linear-gradient(135deg, #8b5cf6, #06b6d4); }
.thumb-grad-9 { background: linear-gradient(135deg, #f43f5e, #a855f7); }
.thumb-grad-10 { background: linear-gradient(135deg, #14b8a6, #6366f1); }
.thumb-grad-11 { background: linear-gradient(135deg, #f97316, #db2777); }
.thumb-grad-12 { background: linear-gradient(135deg, #2563eb, #06b6d4); }

/* 缩略图几何叠层 */
.thumb-decor {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at top right, rgba(255, 255, 255, 0.18), transparent 50%),
    radial-gradient(ellipse at bottom left, rgba(0, 0, 0, 0.3), transparent 50%);
}

.thumb-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 64px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(10px);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  z-index: 1;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.pagination a {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.92rem;
  transition: all var(--t-fast);
  border: 1px solid transparent;
}

.pagination a:hover {
  border-color: rgba(255, 87, 34, 0.3);
  color: white;
}

.pagination a.active {
  background: var(--gradient-fire);
  color: white;
  box-shadow: 0 4px 14px rgba(255, 87, 34, 0.3);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb a:hover {
  color: var(--brand-orange);
}

.breadcrumb span:last-child {
  color: var(--text-primary);
}

/* skeleton placeholder */
.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 0%, var(--bg-card-2) 50%, var(--bg-card) 100%);
  background-size: 200% 100%;
  animation: skeleton-load 1.4s ease-in-out infinite;
}

@keyframes skeleton-load {
  0% { background-position: 0% 0%; }
  100% { background-position: -200% 0%; }
}

/* 详情页 hero */
.page-hero {
  padding: 56px 0 32px;
  background:
    radial-gradient(ellipse 800px 400px at 50% 0%, rgba(255, 87, 34, 0.18), transparent 60%);
  position: relative;
}

.page-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  letter-spacing: -0.02em;
  margin-top: 14px;
}

.page-hero p {
  max-width: 640px;
  font-size: 1.05rem;
  margin-top: 14px;
  color: var(--text-secondary);
}

/* 安装步骤 */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  counter-reset: stepc;
}

.step {
  counter-increment: stepc;
  padding: 28px;
  background: var(--bg-card);
  border-radius: var(--r-lg);
  border: var(--border-subtle);
  position: relative;
}

.step::before {
  content: counter(stepc, decimal-leading-zero);
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 900;
  background: var(--gradient-fire);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 16px;
  display: block;
}

.step h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.step p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .steps { grid-template-columns: 1fr; }
}

/* 价格 */
.price-card {
  background: var(--bg-card);
  border-radius: var(--r-lg);
  padding: 36px 28px;
  border: var(--border-subtle);
  text-align: center;
  transition: all var(--t-med);
}

.price-card.highlight {
  background: var(--gradient-fire);
  color: white;
  transform: scale(1.03);
  box-shadow: var(--shadow-glow);
}

.price-card .price {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 900;
  margin: 12px 0;
  letter-spacing: -0.04em;
}

.price-card .price small {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
}

.price-card.highlight .price small {
  color: rgba(255, 255, 255, 0.85);
}

.price-card ul {
  margin: 24px 0;
  display: grid;
  gap: 10px;
  text-align: left;
}

.price-card ul li {
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.price-card ul li::before {
  content: "✓";
  color: var(--brand-orange);
  font-weight: 700;
}

.price-card.highlight ul li::before {
  color: white;
}

/* 内页 hero 标题下的小标 */
.kicker {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--brand-orange);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
  display: inline-block;
}