/* ========== 全局 & 变量 ========== */
:root {
  --ink: #0d0b0a;
  --ink-2: #1a1613;
  --paper: #f2e8d5;
  --paper-dim: #c9bb9f;
  --gold: #c9a96e;
  --gold-bright: #e2c992;
  --rouge: #9e3b3b;
  --rouge-deep: #6e2828;
  --muted: #8a7d6b;
  --line: rgba(201, 169, 110, 0.18);
  --max: 1180px;
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  /* 3D 轮播图尺寸控制变量 */
  --cover-width: 380px;
  --tz: 140px;
}

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

/* 锚点直接定位（已移除 scroll-behavior: smooth） */
html {
  scroll-behavior: auto;
}

/* 锚点定位避开固定导航 */
section[id],
.headline-bar {
  scroll-margin-top: 80px;
}

body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}
ul {
  list-style: none;
}
img {
  max-width: 100%;
  display: block;
}

::selection {
  background: var(--gold);
  color: var(--ink);
}

/* ========== 顶部导航 ========== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(13, 11, 10, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-serif);
}
.brand-logo {
  height: 36px;
  width: auto;
  border-radius: 4px;
  object-fit: contain;
}
.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--gold-bright);
  letter-spacing: 4px;
}
.brand-sub {
  font-family: var(--font-sans);
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 28px;
}
.nav-links a {
  font-size: 13px;
  color: var(--paper-dim);
  letter-spacing: 1px;
  transition: color 0.2s;
  position: relative;
  padding: 4px 0;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width 0.25s;
}
.nav-links a:hover {
  color: var(--gold-bright);
}
.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  font-size: 12px;
  padding: 8px 20px;
  border: 1px solid var(--gold);
  color: var(--gold-bright);
  letter-spacing: 2px;
  transition:
    background 0.2s,
    color 0.2s;
  white-space: nowrap;
}
.nav-cta:hover {
  background: var(--gold);
  color: var(--ink);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--gold);
  font-size: 22px;
  cursor: pointer;
}

/* ========== 通用 ========== */
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 96px 0;
}
.section-sm {
  padding: 64px 0;
}

.eyebrow {
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 5px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--gold);
}

.h2 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  color: var(--paper);
  letter-spacing: 2px;
  line-height: 1.3;
  margin-bottom: 16px;
}
.h2 em {
  font-style: normal;
  color: var(--gold-bright);
}

.section-lead {
  font-size: 14px;
  color: var(--muted);
  max-width: 580px;
  line-height: 1.9;
}

/* GEO：Hero 快速事实块 */
.geo-summary {
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.85;
  max-width: 480px;
  margin-bottom: 28px;
  padding: 12px 16px;
  border-left: 2px solid var(--gold);
  background: rgba(201, 169, 110, 0.04);
}

/* GEO：Section 快速事实块 */
.geo-fact {
  font-size: 13px;
  color: var(--paper-dim);
  line-height: 1.85;
  max-width: 680px;
  margin-bottom: 20px;
  padding: 12px 18px;
  border-left: 2px solid var(--gold);
  background: rgba(201, 169, 110, 0.04);
}
.geo-fact b {
  color: var(--gold);
  font-weight: 700;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  font-size: 13px;
  letter-spacing: 2px;
  font-weight: 600;
  transition: all 0.25s;
  cursor: pointer;
  border: none;
  font-family: var(--font-sans);
}
.btn-gold {
  background: var(--gold);
  color: var(--ink);
}
.btn-gold:hover {
  background: var(--gold-bright);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--paper);
  border: 1px solid rgba(242, 232, 213, 0.25);
}
.btn-ghost:hover {
  border-color: var(--gold);
  color: var(--gold-bright);
}

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
  border: none;
}

/* ========== 首页 · 封面区 ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 64px;
  overflow: hidden;
  background:
    linear-gradient(rgba(13, 11, 10, 0.65), rgba(13, 11, 10, 0.95)),
    url("https://yumingjiasu3.com/public/drama/cover/hongguo_7507462202631130136.jpg") center/cover
      no-repeat,
    var(--ink);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 60px,
      rgba(201, 169, 110, 0.025) 60px,
      rgba(201, 169, 110, 0.025) 61px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 60px,
      rgba(201, 169, 110, 0.025) 60px,
      rgba(201, 169, 110, 0.025) 61px
    );
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
  padding: 80px 0;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--muted);
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.hero-meta .vol {
  color: var(--gold);
  border: 1px solid var(--line);
  padding: 3px 10px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(40px, 6.2vw, 76px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: 3px;
  color: var(--paper);
  margin-bottom: 10px;
}
.hero-title .gold {
  color: var(--gold-bright);
  display: block;
}
.hero-title .rouge {
  color: var(--rouge);
  font-style: italic;
}

.hero-tagline {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--paper-dim);
  letter-spacing: 4px;
  margin-bottom: 24px;
}

.hero-desc {
  font-size: 14px;
  color: var(--paper-dim);
  max-width: 480px;
  line-height: 1.95;
  margin-bottom: 20px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.hero-stats {
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
}
.hero-stat b {
  display: block;
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--gold-bright);
  letter-spacing: 1px;
}
.hero-stat span {
  font-size: 11px;
  color: var(--paper-dim);
  letter-spacing: 1px;
}

/* ========== 3D 动态多图效果 ========== */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1200px; /* 3D 透视 */
}

.carousel-3d {
  width: 100%;
  max-width: var(--cover-width);
  aspect-ratio: 3 / 4;
  position: relative;
  transform-style: preserve-3d;
}

.carousel-3d-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  animation: rotate3d 15s infinite linear; /* 自动旋转，15秒一圈 */
}

.carousel-3d:hover .carousel-3d-inner {
  animation-play-state: paused; /* 鼠标悬停时暂停旋转 */
}

.carousel-item {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6);
  backface-visibility: hidden;
}

.carousel-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 3张图的 3D 位置计算 */
.carousel-item:nth-child(1) {
  transform: rotateY(0deg) translateZ(var(--tz));
}
.carousel-item:nth-child(2) {
  transform: rotateY(120deg) translateZ(var(--tz));
}
.carousel-item:nth-child(3) {
  transform: rotateY(240deg) translateZ(var(--tz));
}

@keyframes rotate3d {
  0% {
    transform: rotateY(0deg);
  }
  100% {
    transform: rotateY(-360deg);
  }
}

/* 覆盖在 3D 轮播上的文字信息层 */
.cover-info-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(13, 11, 10, 0.98) 0%,
    rgba(13, 11, 10, 0.6) 45%,
    transparent 100%
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 32px 28px;
  z-index: 10;
  pointer-events: none; /* 让鼠标悬停可以触发到底层的 3D 旋转 */
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
}
.cover-info-overlay::before {
  content: "花";
  position: absolute;
  top: -40px;
  right: -20px;
  font-family: var(--font-serif);
  font-size: 280px;
  font-weight: 900;
  color: rgba(201, 169, 110, 0.04);
  line-height: 1;
  pointer-events: none;
  z-index: -1;
}
.cover-info-overlay::after {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(201, 169, 110, 0.12);
  pointer-events: none;
}

.cover-kicker {
  font-size: 10px;
  letter-spacing: 4px;
  color: var(--rouge);
  margin-bottom: 14px;
  font-weight: 700;
}
.cover-title {
  font-family: var(--font-serif);
  font-size: 34px;
  font-weight: 900;
  color: var(--gold-bright);
  line-height: 1.25;
  letter-spacing: 2px;
  margin-bottom: 10px;
}
.cover-sub {
  font-size: 12px;
  color: var(--paper-dim);
  letter-spacing: 1px;
  line-height: 1.8;
  margin-bottom: 22px;
}
.cover-tag {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 2px;
  border: 1px solid var(--gold);
  color: var(--gold);
  padding: 4px 12px;
  align-self: flex-start;
}
.cover-stamp {
  position: absolute;
  top: 28px;
  right: 28px;
  width: 56px;
  height: 56px;
  border: 2px solid var(--rouge);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 11px;
  color: var(--rouge);
  letter-spacing: 1px;
  text-align: center;
  line-height: 1.3;
  transform: rotate(8deg);
  z-index: 2;
}

/* ========== 头条 · 剧目 ========== */
.headline-bar {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--ink-2);
}
.headline-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px 0;
  overflow: hidden;
  white-space: nowrap;
}
.headline-label {
  flex-shrink: 0;
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--rouge);
  font-weight: 700;
  border: 1px solid var(--rouge);
  padding: 3px 10px;
}
.headline-scroll {
  display: flex;
  gap: 48px;
  animation: marquee 28s linear infinite;
  font-size: 12px;
  color: var(--paper-dim);
  letter-spacing: 1px;
}
.headline-scroll span {
  flex-shrink: 0;
}
.headline-scroll b {
  color: var(--gold);
  font-weight: 600;
}
@keyframes marquee {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

/* ========== AI真人短剧 ========== */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.ai-card {
  background: var(--ink-2);
  border: 1px solid var(--line);
  padding: 32px 26px;
  position: relative;
  transition:
    border-color 0.3s,
    transform 0.3s;
}
.ai-card:hover {
  border-color: rgba(201, 169, 110, 0.45);
  transform: translateY(-4px);
}
.ai-card-num {
  font-family: var(--font-serif);
  font-size: 42px;
  font-weight: 900;
  color: rgba(201, 169, 110, 0.12);
  line-height: 1;
  margin-bottom: 18px;
}
.ai-card h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--gold-bright);
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.ai-card p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.9;
}

/* 剧目库 H3 标题 */
.drama-strip-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--gold-bright);
  letter-spacing: 1px;
  margin-top: 56px;
  margin-bottom: 8px;
}

/* ========== 剧目卡片 ========== */
.drama-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 24px;
}
.drama-card {
  background: var(--ink-2);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: border-color 0.25s;
  display: flex;
  flex-direction: column;
}
.drama-card:hover {
  border-color: var(--gold);
}
.drama-poster {
  aspect-ratio: 3 / 4;
  background: #14100d;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.drama-poster img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
  z-index: 0;
}
.drama-card:hover .drama-poster img {
  transform: scale(1.05);
}
.drama-poster::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(13, 11, 10, 0.96) 0%,
    rgba(13, 11, 10, 0.35) 45%,
    transparent 100%
  );
  z-index: 1;
  pointer-events: none;
}
.drama-poster::after {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(201, 169, 110, 0.15);
  z-index: 2;
  pointer-events: none;
}
.drama-overlay {
  position: relative;
  z-index: 3;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.drama-badge {
  font-size: 9px;
  letter-spacing: 2px;
  color: var(--ink);
  background: var(--gold);
  padding: 2px 8px;
  align-self: flex-start;
  font-weight: 700;
  display: inline-block;
}
.drama-poster h4 {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--gold-bright);
  line-height: 1.4;
  letter-spacing: 1px;
}
.drama-info {
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.drama-info .meta {
  font-size: 11px;
  color: var(--muted);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}
.drama-info .meta b {
  color: var(--gold);
  font-weight: 600;
}
.drama-desc {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

/* ========== 短剧特色（对照） ========== */
.features {
  background: var(--ink-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.versus {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 48px;
  border: 1px solid var(--line);
}
.versus-col {
  padding: 36px 32px;
}
.versus-col.bad {
  border-right: 1px solid var(--line);
}
.versus-col h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  letter-spacing: 2px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.versus-col.bad h3 {
  color: var(--muted);
}
.versus-col.good h3 {
  color: var(--gold-bright);
}
.versus-col ul li {
  font-size: 13px;
  color: var(--muted);
  padding: 9px 0;
  display: flex;
  gap: 10px;
  line-height: 1.7;
  border-bottom: 1px solid rgba(201, 169, 110, 0.06);
}
.versus-col ul li:last-child {
  border-bottom: none;
}
.versus-col.bad li::before {
  content: "×";
  color: #7a3a3a;
  font-weight: 900;
  flex-shrink: 0;
}
.versus-col.good li {
  color: var(--paper-dim);
}
.versus-col.good li::before {
  content: "✓";
  color: var(--gold);
  font-weight: 900;
  flex-shrink: 0;
}

/* ========== 常见问题 ========== */
.faq-list {
  margin-top: 48px;
  border-top: 1px solid var(--line);
}
.faq-item {
  border-bottom: 1px solid var(--line);
}

/* FAQ 问题标题：h3 包裹 button，保留语义同时保持交互 */
.faq-heading {
  margin: 0;
  padding: 0;
  font-size: inherit;
  font-weight: inherit;
  font-family: inherit;
  color: inherit;
  letter-spacing: inherit;
  line-height: inherit;
}

.faq-q {
  width: 100%;
  background: none;
  border: none;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 15px;
  text-align: left;
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  cursor: pointer;
  letter-spacing: 0.5px;
}
.faq-q .idx {
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--gold);
  flex-shrink: 0;
  width: 32px;
}
.faq-q .qtext {
  flex: 1;
}
.faq-q .icon {
  color: var(--gold);
  font-size: 20px;
  transition: transform 0.3s;
  flex-shrink: 0;
}
.faq-item.open .faq-q .icon {
  transform: rotate(45deg);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-a p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.95;
  padding: 0 0 24px 52px;
}

/* ========== 安装教程 ========== */
.install-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.step-card {
  border: 1px solid var(--line);
  padding: 32px 26px;
  position: relative;
  background: var(--ink-2);
}
.step-num {
  font-family: var(--font-serif);
  font-size: 56px;
  font-weight: 900;
  color: rgba(201, 169, 110, 0.1);
  line-height: 1;
  margin-bottom: 16px;
}
.step-card h3 {
  font-size: 16px;
  color: var(--gold-bright);
  margin-bottom: 10px;
  letter-spacing: 1px;
  font-family: var(--font-serif);
}
.step-card p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.85;
}
.step-card .platform {
  display: inline-block;
  font-size: 9px;
  letter-spacing: 2px;
  border: 1px solid var(--line);
  padding: 2px 8px;
  color: var(--paper-dim);
  margin-top: 14px;
}

/* ========== 热门评论 · 一问一答 ========== */
.reviews {
  background: var(--ink-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.qa-list {
  max-width: 880px;
  margin: 48px auto 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.qa-item {
  border: 1px solid var(--line);
  background: var(--ink);
  transition: border-color 0.25s;
}
.qa-item:hover {
  border-color: rgba(201, 169, 110, 0.38);
}

.qa-q {
  display: flex;
  gap: 16px;
  padding: 24px 28px 20px;
  border-bottom: 1px dashed var(--line);
}
.qa-mark {
  flex-shrink: 0;
  width: 34px;
  height: 34px;
  border: 1px solid var(--rouge);
  color: var(--rouge);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
}
.qa-mark.answer {
  border-color: var(--gold);
  color: var(--gold);
}

.qa-q-body {
  flex: 1;
  min-width: 0;
}
.qa-user {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.qa-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--rouge), var(--rouge-deep));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 11px;
  color: var(--gold-bright);
  flex-shrink: 0;
}
.qa-name {
  font-size: 12px;
  color: var(--paper);
  letter-spacing: 0.5px;
}
.qa-when {
  font-size: 10px;
  color: #6d6355;
  letter-spacing: 1px;
}

/* 评论问题标题：由 div 改为 h3，重置默认样式 */
.qa-q-text {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 400;
  color: var(--paper);
  line-height: 1.75;
  letter-spacing: 0.5px;
  margin: 0;
}

.qa-a {
  display: flex;
  gap: 16px;
  padding: 20px 28px 8px;
}
.qa-a-body {
  flex: 1;
  min-width: 0;
}
.qa-official {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  color: var(--gold);
  letter-spacing: 1px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.qa-official .badge {
  font-size: 9px;
  border: 1px solid var(--gold);
  padding: 1px 7px;
  letter-spacing: 1px;
}
.qa-a-text {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 2;
}
.qa-a-text p + p {
  margin-top: 10px;
}
.qa-a-text b {
  color: var(--paper-dim);
  font-weight: 600;
}
.qa-a-text .hl {
  color: var(--gold);
}

.qa-meta {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 11px;
  color: #6d6355;
  padding: 14px 28px 18px 78px;
  letter-spacing: 0.5px;
}
.qa-meta .useful {
  color: var(--paper-dim);
}
.qa-meta .useful::before {
  content: "▲ ";
  font-size: 9px;
  color: var(--gold);
}

/* ========== 客户端 ========== */
.client-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: stretch;
  margin-top: 48px;
}
.client-platforms {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.client-item {
  display: flex;
  align-items: center;
  gap: 20px;
  border: 1px solid var(--line);
  padding: 20px 24px;
  transition:
    border-color 0.25s,
    background 0.25s;
}
.client-item:hover {
  border-color: var(--gold);
  background: rgba(201, 169, 110, 0.04);
}
.client-icon {
  width: 44px;
  height: 44px;
  border: 1px solid var(--gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--gold);
  flex-shrink: 0;
}
.client-item h4 {
  font-size: 14px;
  color: var(--paper);
  margin-bottom: 3px;
  letter-spacing: 1px;
}
.client-item p {
  font-size: 11px;
  color: var(--muted);
}
.client-item .arrow {
  margin-left: auto;
  color: var(--gold);
  font-size: 18px;
}

/* 右侧侧边栏区域 */
.client-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.client-note {
  border: 1px solid var(--line);
  padding: 36px 32px;
  background: var(--ink-2);
  position: relative;
  flex: 1;
}
.client-note::before {
  content: "“";
  position: absolute;
  top: 8px;
  left: 20px;
  font-family: var(--font-serif);
  font-size: 80px;
  color: rgba(201, 169, 110, 0.1);
  line-height: 1;
}
.client-note p {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--paper-dim);
  line-height: 2;
  position: relative;
  z-index: 1;
}
.client-note small {
  display: block;
  margin-top: 18px;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 2px;
  font-family: var(--font-sans);
}

/* 扫码下载模块 */
.qr-download-box {
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.qr-image-wrap {
  width: 120px;
  height: 120px;
  background: #fff;
  padding: 6px;
  border-radius: 4px;
  flex-shrink: 0;
}
.qr-text h4 {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--gold-bright);
  margin-bottom: 8px;
  letter-spacing: 1px;
}
.qr-text p {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
}

/* ========== 合作伙伴 ========== */
.partners-section {
  padding: 40px 0;
  border-top: 1px solid var(--line);
  background: var(--ink);
}
.partners-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}
.partners-title {
  font-size: 14px;
  color: var(--paper);
  font-weight: 700;
  letter-spacing: 2px;
}
.partners-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.partner-item {
  font-size: 12px;
  color: var(--gold);
  border: 1px solid var(--line);
  padding: 4px 16px;
  border-radius: 20px;
  transition: all 0.25s;
  white-space: nowrap;
}
.partner-item:hover {
  border-color: var(--gold);
  background: rgba(201, 169, 110, 0.08);
  color: var(--gold-bright);
}

/* ========== 底部 CTA ========== */
.final-cta {
  text-align: center;
  padding: 100px 0;
  border-top: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.final-cta::before {
  content: "花魁";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-serif);
  font-size: clamp(160px, 30vw, 360px);
  font-weight: 900;
  color: rgba(201, 169, 110, 0.025);
  line-height: 1;
  white-space: nowrap;
  pointer-events: none;
}
.final-cta .h2 {
  position: relative;
  z-index: 1;
}
.final-cta p {
  position: relative;
  z-index: 1;
  color: var(--muted);
  font-size: 14px;
  margin: 16px 0 32px;
}
.final-cta .btn {
  position: relative;
  z-index: 1;
}

/* ========== 页脚 ========== */
.footer {
  border-top: 1px solid var(--line);
  padding: 40px 0;
  font-size: 11px;
  color: var(--muted);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  color: var(--muted);
  transition: color 0.2s;
}
.footer-links a:hover {
  color: var(--gold);
}

/* ========== 响应式 ========== */
@media (max-width: 960px) {
  :root {
    --cover-width: 320px;
    --tz: 118px;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 64px 0;
  }
  .hero-visual {
    justify-content: flex-start;
  }
  .ai-grid {
    grid-template-columns: 1fr 1fr;
  }
  .drama-strip {
    grid-template-columns: 1fr 1fr;
  }
  .install-steps {
    grid-template-columns: 1fr;
  }
  .client-wrap {
    grid-template-columns: 1fr;
  }
  .versus {
    grid-template-columns: 1fr;
  }
  .versus-col.bad {
    border-right: none;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 720px) {
  :root {
    --cover-width: 250px;
    --tz: 86px;
  }
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: block;
  }
  .nav-cta {
    display: none;
  }
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--ink);
    border-bottom: 1px solid var(--line);
    padding: 20px 24px;
    gap: 16px;
  }
  .section {
    padding: 64px 0;
  }

  /* --- 手机端 Hero 区域精简 --- */
  .hero {
    min-height: auto;
    padding-top: 84px;
    padding-bottom: 40px;
  }
  .hero-inner {
    padding: 0;
    gap: 32px;
  }
  .hero-title {
    font-size: 34px;
    letter-spacing: 2px;
  }
  .hero-tagline {
    font-size: 13px;
    margin-bottom: 16px;
    letter-spacing: 2px;
  }
  .hero-desc {
    font-size: 13px;
    margin-bottom: 16px;
    line-height: 1.8;
  }
  .geo-summary {
    font-size: 12px;
    padding: 10px 14px;
    margin-bottom: 20px;
  }
  .geo-fact {
    font-size: 12px;
    padding: 10px 14px;
  }
  .hero-actions {
    margin-bottom: 28px;
    gap: 10px;
  }
  .hero-actions .btn {
    padding: 12px 20px;
    font-size: 13px;
  }
  .hero-stats {
    gap: 20px;
  }
  .hero-stat b {
    font-size: 20px;
  }
  .hero-stat span {
    font-size: 10px;
  }

  /* 3D 轮播图适配 */
  .carousel-3d {
    margin: 0 auto;
  }
  .cover-info-overlay {
    padding: 20px;
  }
  .cover-title {
    font-size: 22px;
  }
  .cover-sub {
    font-size: 11px;
    margin-bottom: 14px;
  }
  .cover-kicker {
    font-size: 9px;
    margin-bottom: 10px;
  }
  .cover-stamp {
    width: 44px;
    height: 44px;
    font-size: 10px;
    top: 16px;
    right: 16px;
  }

  .ai-grid {
    grid-template-columns: 1fr;
  }
  .drama-strip {
    grid-template-columns: 1fr 1fr;
  }
  .drama-strip-title {
    font-size: 17px;
    margin-top: 40px;
  }
  .faq-a p {
    padding-left: 0;
  }
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .qa-q {
    padding: 20px 18px 16px;
    gap: 12px;
  }
  .qa-a {
    padding: 16px 18px 6px;
    gap: 12px;
  }
  .qa-mark {
    width: 28px;
    height: 28px;
    font-size: 13px;
  }
  .qa-q-text {
    font-size: 15px;
  }
  .qa-meta {
    padding: 12px 18px 16px 58px;
    gap: 14px;
  }

  .partners-inner {
    flex-direction: column;
    text-align: center;
  }
  .qr-download-box {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 460px) {
  :root {
    --cover-width: 220px;
    --tz: 76px;
  }
  .hero-title {
    font-size: 28px;
  }
  .drama-strip {
    grid-template-columns: 1fr;
  }

  /* 按钮水平并排，不再全宽堆叠 */
  .hero-actions {
    flex-direction: row;
    align-items: center;
  }
  .hero-actions .btn {
    flex: 1;
    width: auto;
    white-space: nowrap;
  }
}