/* ===================================================================
   通义千问官网 · 青花瓷风 官方样式表
   背景瓷白 #F8F9FA · 主色青花蓝 #1E4A8A · 辅色淡青 #7BA7D9 · 点缀釉里红 #B03A2E
   传世白瓷温润釉光 · 青花缠枝莲纹 · 回纹如意云肩 · 典雅端庄中式瓷韵
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700;900&display=swap');

:root {
  --color-porcelain-white: #F8F9FA;      /* 背景：瓷白 / 景德镇高岭土白瓷釉面 */
  --color-porcelain-glaze: #FFFFFF;      /* 纯白高光釉色 */
  --color-porcelain-card: #F0F4F8;       /* 浅釉青瓷卡片底 */
  --color-cobalt-blue: #1E4A8A;          /* 主色：青花蓝 / 苏麻离青浓艳深蓝 */
  --color-cobalt-deep: #132F58;          /* 沉铁青黑 / 铁锈斑深蓝 */
  --color-cobalt-light: #2A60AC;         /* 鲜亮青花蓝 */
  --color-pale-blue: #7BA7D9;            /* 辅色：淡青 / 水澈浅青花分水色 */
  --color-pale-blue-subtle: #D2E3F4;     /* 极淡青水色 */
  --color-underglaze-red: #B03A2E;       /* 点缀：釉里红 / 铜红窑变点睛 */
  --color-underglaze-red-light: #C0392B; /* 明艳釉里红 */
  --color-porcelain-ink: #1B2A3D;        /* 墨青字色 */

  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;

  --shadow-porcelain: 0 8px 24px rgba(30, 74, 138, 0.1), 0 2px 6px rgba(123, 167, 217, 0.15);
  --shadow-glaze-glow: 0 12px 30px rgba(30, 74, 138, 0.16), 0 0 24px rgba(123, 167, 217, 0.28);
  --shadow-subtle: 0 4px 12px rgba(30, 74, 138, 0.08);

  --border-cobalt: 2px solid var(--color-cobalt-blue);
  --border-pale: 1.5px solid var(--color-pale-blue);
  --border-ruyi: 1.5px dashed var(--color-cobalt-blue);

  --radius-porcelain: 10px;
  --transition-porcelain: all 0.32s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* 全局基础重置与温润白瓷釉光背景 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-serif);
  background-color: var(--color-porcelain-white);
  color: var(--color-porcelain-ink);
  line-height: 1.85;
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  /* 传世青花白瓷釉面微光、淡青晕染与开片暗纹质感 */
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(123, 167, 217, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 85% 20%, rgba(30, 74, 138, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 50% 85%, rgba(176, 58, 46, 0.05) 0%, transparent 60%),
    linear-gradient(rgba(248, 249, 250, 0.96), rgba(240, 244, 248, 0.98));
}

/* 顶部青花经典回纹与如意连珠纹饰带 */
.porcelain-top-strip {
  height: 8px;
  width: 100%;
  background: repeating-linear-gradient(
    90deg,
    var(--color-cobalt-blue) 0px,
    var(--color-cobalt-blue) 16px,
    var(--color-porcelain-white) 16px,
    var(--color-porcelain-white) 22px,
    var(--color-pale-blue) 22px,
    var(--color-pale-blue) 38px,
    var(--color-underglaze-red) 38px,
    var(--color-underglaze-red) 42px
  );
  border-bottom: 2px solid var(--color-cobalt-blue);
  position: relative;
  z-index: 1000;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ===================================================================
   顶部导航栏（青花分水雅韵 · 缠枝如意回纹边线）
   =================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--color-cobalt-blue);
  box-shadow: 0 4px 16px rgba(30, 74, 138, 0.08);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.porcelain-logo-badge {
  width: 46px;
  height: 46px;
  background-color: #FFFFFF;
  border: 2px solid var(--color-cobalt-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 3px 10px rgba(30, 74, 138, 0.15);
  position: relative;
  transition: var(--transition-porcelain);
}

.porcelain-logo-badge::after {
  content: "";
  position: absolute;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px dashed var(--color-pale-blue);
  pointer-events: none;
}

.brand-logo:hover .porcelain-logo-badge {
  transform: rotate(360deg);
  border-color: var(--color-underglaze-red);
}

.brand-logo-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.55rem;
  font-weight: 900;
  color: var(--color-cobalt-blue);
  letter-spacing: 1.5px;
  line-height: 1.1;
}

.brand-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-underglaze-red);
  letter-spacing: 0.5px;
  background-color: rgba(176, 58, 46, 0.08);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid rgba(176, 58, 46, 0.3);
  align-self: flex-start;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 10px;
}

.nav-links li a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-porcelain-ink);
  padding: 8px 14px;
  border-radius: 6px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  position: relative;
}

.nav-links li a:hover,
.nav-links li a.active {
  background-color: var(--color-porcelain-card);
  border: 1px solid var(--color-cobalt-blue);
  color: var(--color-cobalt-blue);
  box-shadow: 0 2px 6px rgba(30, 74, 138, 0.12);
}

.nav-lotus-icon {
  font-size: 0.9rem;
  color: var(--color-pale-blue);
}

.nav-links li a.nav-highlight-btn {
  background-color: var(--color-cobalt-blue);
  color: #FFFFFF;
  border: 1px solid var(--color-cobalt-deep);
  box-shadow: 0 2px 8px rgba(30, 74, 138, 0.25);
}

.nav-links li a.nav-highlight-btn:hover {
  background-color: var(--color-cobalt-deep);
  color: #FFFFFF;
  transform: translateY(-2px);
}

/* ===================================================================
   Hero 首屏 + 下载区（并列 4 个下载入口，零滚动即可转化）
   =================================================================== */
.hero-section {
  padding: 38px 0 46px;
  position: relative;
  text-align: center;
  overflow: hidden;
}

/* 缠枝莲青花盘形微晕 */
.hero-porcelain-disc {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 720px;
  height: 720px;
  border-radius: 50%;
  border: 1px dashed rgba(123, 167, 217, 0.25);
  pointer-events: none;
  z-index: 0;
  animation: discSpin 60s linear infinite;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: #FFFFFF;
  color: var(--color-cobalt-blue);
  border: 1.5px solid var(--color-cobalt-blue);
  padding: 6px 20px;
  border-radius: 30px;
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 16px;
  box-shadow: 0 2px 8px rgba(30, 74, 138, 0.1);
  letter-spacing: 1px;
}

/* H1 标题（严格与 Title 逐字一致） */
.hero-title {
  font-size: 2.15rem;
  font-weight: 900;
  color: var(--color-cobalt-blue);
  letter-spacing: 1.5px;
  line-height: 1.35;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
  text-shadow: 1px 1px 0px rgba(255, 255, 255, 0.8), 2px 2px 6px rgba(30, 74, 138, 0.15);
}

/* 一句话价值主张 */
.hero-subtitle {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-underglaze-red);
  margin-bottom: 14px;
  letter-spacing: 1.2px;
  display: inline-block;
  background-color: #FFFFFF;
  padding: 4px 20px;
  border-radius: 6px;
  border: 1px solid var(--color-pale-blue);
  box-shadow: 0 2px 6px rgba(30, 74, 138, 0.08);
}

.hero-desc {
  font-size: 0.98rem;
  color: var(--color-porcelain-ink);
  max-width: 840px;
  margin: 0 auto 28px;
  line-height: 1.8;
  position: relative;
  z-index: 1;
}

/* 并列 4 个下载卡片（零滚动转化） */
.download-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 10px;
  position: relative;
  z-index: 1;
}

.download-card {
  background-color: #FFFFFF;
  border: 2px solid var(--color-pale-blue);
  border-radius: var(--radius-porcelain);
  padding: 22px 18px 20px;
  position: relative;
  text-align: center;
  transition: var(--transition-porcelain);
  box-shadow: var(--shadow-porcelain);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* 青花回纹内衬边线 */
.download-card::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 4px;
  right: 4px;
  bottom: 4px;
  border: 1px dashed rgba(30, 74, 138, 0.25);
  border-radius: 7px;
  pointer-events: none;
}

.download-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-cobalt-blue);
  box-shadow: var(--shadow-glaze-glow);
  background-color: #FCFDFE;
}

.card-porcelain-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 12px;
  background: radial-gradient(circle at 30% 30%, #FFFFFF 0%, var(--color-porcelain-card) 100%);
  color: var(--color-cobalt-blue);
  border: 2px solid var(--color-cobalt-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  box-shadow: 0 4px 10px rgba(30, 74, 138, 0.15);
  transition: var(--transition-porcelain);
}

.download-card:hover .card-porcelain-icon {
  transform: scale(1.1) rotate(6deg);
  background: var(--color-cobalt-blue);
  color: #FFFFFF;
}

.download-card h3 {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--color-cobalt-blue);
  margin-bottom: 8px;
}

.download-card p {
  font-size: 0.85rem;
  color: #4A5B73;
  line-height: 1.58;
  margin-bottom: 16px;
  flex-grow: 1;
}

.porcelain-btn {
  display: inline-block;
  background-color: var(--color-cobalt-blue);
  color: #FFFFFF;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid var(--color-cobalt-deep);
  box-shadow: 0 2px 6px rgba(30, 74, 138, 0.2);
  transition: var(--transition-porcelain);
}

.porcelain-btn:hover {
  background-color: var(--color-cobalt-deep);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(30, 74, 138, 0.3);
}

/* ===================================================================
   统一版式模块（Qwen大模型 / AI创作 / 全局AI / 语音输入法）
   模块名 + 情绪化短标题 + 场景化功能点
   =================================================================== */
.module-section {
  padding: 56px 0;
  position: relative;
  border-top: 1.5px dashed var(--color-pale-blue);
}

.module-section:nth-of-type(even) {
  background-color: rgba(240, 244, 248, 0.65);
}

.module-wrapper {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 42px;
  align-items: center;
}

.module-section:nth-of-type(even) .module-wrapper {
  grid-template-columns: 0.9fr 1.1fr;
}

.module-section:nth-of-type(even) .module-media {
  order: 1;
}

.module-section:nth-of-type(even) .module-content {
  order: 2;
}

.module-tag-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.module-tag-badge {
  font-size: 0.95rem;
  font-weight: 700;
  color: #FFFFFF;
  background-color: var(--color-cobalt-blue);
  padding: 3px 14px;
  border-radius: 4px;
  border: 1px solid var(--color-cobalt-deep);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 2px 6px rgba(30, 74, 138, 0.15);
}

.module-index-num {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-underglaze-red);
}

.module-emotional-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--color-cobalt-blue);
  line-height: 1.35;
  margin-bottom: 14px;
}

.module-intro-desc {
  font-size: 0.98rem;
  color: var(--color-porcelain-ink);
  line-height: 1.75;
  margin-bottom: 22px;
}

.scenario-feature-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.scenario-item {
  background-color: #FFFFFF;
  border: 1.5px solid var(--color-pale-blue);
  border-left: 5px solid var(--color-cobalt-blue);
  border-radius: 6px;
  padding: 14px 18px;
  transition: var(--transition-porcelain);
  box-shadow: 0 2px 6px rgba(30, 74, 138, 0.05);
}

.scenario-item:hover {
  transform: translateX(4px);
  border-color: var(--color-cobalt-blue);
  box-shadow: 0 4px 14px rgba(30, 74, 138, 0.15);
}

.scenario-title {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--color-cobalt-blue);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.scenario-icon {
  color: var(--color-underglaze-red);
  font-size: 1rem;
}

.scenario-desc {
  font-size: 0.88rem;
  color: #4A5B73;
  line-height: 1.6;
}

/* 青花瓷器画框 */
.porcelain-artwork-frame {
  background-color: #FFFFFF;
  border: 3px solid var(--color-cobalt-blue);
  border-radius: 12px;
  padding: 10px;
  box-shadow: var(--shadow-glaze-glow);
  position: relative;
  transition: var(--transition-porcelain);
}

.porcelain-artwork-frame::before {
  content: "";
  position: absolute;
  top: -6px;
  left: -6px;
  right: -6px;
  bottom: -6px;
  border: 1px dashed var(--color-pale-blue);
  border-radius: 16px;
  pointer-events: none;
}

.porcelain-artwork-frame img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--color-pale-blue-subtle);
  display: block;
}

.porcelain-artwork-frame:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(30, 74, 138, 0.22);
}

.porcelain-artwork-caption {
  margin-top: 10px;
  font-size: 0.82rem;
  font-weight: 600;
  text-align: center;
  color: var(--color-cobalt-blue);
}

/* ===================================================================
   网页版入口横幅 — 零安装兜底
   =================================================================== */
.web-entry-banner {
  margin: 50px auto 40px;
  background: linear-gradient(135deg, var(--color-cobalt-deep) 0%, var(--color-cobalt-blue) 100%);
  border: 2px solid var(--color-pale-blue);
  border-radius: 12px;
  padding: 38px 36px;
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-glaze-glow);
}

.web-entry-banner::before {
  content: "❖ 素胚勾勒 · 青花分水 · 釉里生辉 ❖";
  position: absolute;
  top: 10px;
  right: 20px;
  font-size: 0.75rem;
  letter-spacing: 2px;
  color: var(--color-pale-blue);
  opacity: 0.55;
}

.web-banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.web-banner-text h2 {
  font-size: 1.85rem;
  font-weight: 800;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.web-banner-text p {
  font-size: 0.98rem;
  color: rgba(255, 255, 255, 0.92);
  max-width: 680px;
  line-height: 1.7;
}

.web-banner-btn-group {
  display: flex;
  gap: 14px;
  flex-shrink: 0;
}

.web-btn-gold {
  background-color: #FFFFFF;
  color: var(--color-cobalt-blue);
  font-size: 1.05rem;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: 6px;
  border: 1px solid var(--color-pale-blue);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.web-btn-gold:hover {
  background-color: var(--color-porcelain-card);
  color: var(--color-cobalt-deep);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}

.web-btn-outline {
  background-color: transparent;
  color: #FFFFFF;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 20px;
  border-radius: 6px;
  border: 1.5px dashed var(--color-pale-blue);
  display: inline-flex;
  align-items: center;
}

.web-btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: #FFFFFF;
}

/* ===================================================================
   网页版体验页面（web.html 专属模块）
   =================================================================== */
.web-hero {
  padding: 40px 0 30px;
  text-align: center;
}

.web-hero-title {
  font-size: 2.15rem;
  font-weight: 900;
  color: var(--color-cobalt-blue);
  line-height: 1.35;
  margin-bottom: 12px;
}

.web-workspace-mock {
  background-color: #FFFFFF;
  border: 2px solid var(--color-cobalt-blue);
  border-radius: 10px;
  margin: 24px auto 40px;
  box-shadow: var(--shadow-glaze-glow);
  overflow: hidden;
  text-align: left;
}

.mock-window-header {
  background-color: var(--color-cobalt-blue);
  color: #FFFFFF;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 2px solid var(--color-cobalt-deep);
}

.mock-window-title {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.mock-window-dots {
  display: flex;
  gap: 8px;
}

.mock-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-pale-blue);
}

.mock-chat-container {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  background-color: #FAFBFD;
}

.chat-bubble {
  max-width: 82%;
  padding: 14px 18px;
  border-radius: 8px;
  font-size: 0.94rem;
  line-height: 1.7;
}

.chat-user {
  align-self: flex-end;
  background-color: var(--color-cobalt-blue);
  color: #FFFFFF;
  border-bottom-right-radius: 2px;
  box-shadow: 0 2px 6px rgba(30, 74, 138, 0.2);
}

.chat-assistant {
  align-self: flex-start;
  background-color: #FFFFFF;
  color: var(--color-porcelain-ink);
  border: 1.5px solid var(--color-pale-blue);
  border-bottom-left-radius: 2px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.chat-assistant-badge {
  color: var(--color-cobalt-blue);
  font-weight: 700;
  margin-bottom: 6px;
  display: block;
}

.mock-input-row {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}

.mock-input-box {
  flex-grow: 1;
  background-color: #FFFFFF;
  border: 1.5px solid var(--color-pale-blue);
  border-radius: 6px;
  padding: 12px 16px;
  font-size: 0.92rem;
  color: var(--color-porcelain-ink);
}

.mock-send-btn {
  background-color: var(--color-cobalt-blue);
  color: #FFFFFF;
  border: 1px solid var(--color-cobalt-deep);
  font-size: 1rem;
  font-weight: 700;
  padding: 0 22px;
  border-radius: 6px;
  cursor: pointer;
}

/* ===================================================================
   帮助中心页面（help.html 专属模块）
   =================================================================== */
.help-hero {
  padding: 40px 0 30px;
  text-align: center;
}

.help-hero-title {
  font-size: 2.15rem;
  font-weight: 900;
  color: var(--color-cobalt-blue);
  line-height: 1.35;
  margin-bottom: 12px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin: 30px auto 50px;
}

.faq-card {
  background-color: #FFFFFF;
  border: 1.5px solid var(--color-pale-blue);
  border-radius: 8px;
  padding: 22px 24px;
  box-shadow: var(--shadow-porcelain);
  transition: var(--transition-porcelain);
}

.faq-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-cobalt-blue);
  box-shadow: var(--shadow-glaze-glow);
}

.faq-question {
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--color-cobalt-blue);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.faq-q-icon {
  width: 28px;
  height: 28px;
  background-color: var(--color-cobalt-blue);
  color: #FFFFFF;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.92rem;
  flex-shrink: 0;
}

.faq-answer {
  font-size: 0.94rem;
  color: #4A5B73;
  line-height: 1.8;
  padding-left: 38px;
}

/* ===================================================================
   页脚（通义千问官方版权与站内导航）
   =================================================================== */
.site-footer {
  background-color: #FFFFFF;
  border-top: 2px solid var(--color-cobalt-blue);
  padding: 42px 0 28px;
  margin-top: 50px;
  position: relative;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 30px;
}

.footer-brand h4 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-cobalt-blue);
  margin-bottom: 10px;
}

.footer-brand p {
  font-size: 0.88rem;
  color: #4A5B73;
  line-height: 1.7;
}

.footer-col h5 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-cobalt-blue);
  margin-bottom: 14px;
  position: relative;
  display: inline-block;
}

.footer-col h5::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background-color: var(--color-underglaze-red);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col ul li a {
  font-size: 0.88rem;
  color: #4A5B73;
}

.footer-col ul li a:hover {
  color: var(--color-cobalt-blue);
  padding-left: 4px;
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px dashed var(--color-pale-blue);
  font-size: 0.84rem;
  color: #6C7D93;
}

/* ===================================================================
   关键帧动画
   =================================================================== */
@keyframes discSpin {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* ===================================================================
   响应式断点适配
   =================================================================== */
@media (max-width: 992px) {
  .download-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .module-wrapper,
  .module-section:nth-of-type(even) .module-wrapper {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .module-section:nth-of-type(even) .module-media {
    order: 0;
  }
  .module-section:nth-of-type(even) .module-content {
    order: 1;
  }
  .web-banner-inner {
    flex-direction: column;
    text-align: center;
  }
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 640px) {
  .download-grid {
    grid-template-columns: 1fr;
  }
  .hero-title,
  .web-hero-title,
  .help-hero-title {
    font-size: 1.65rem;
  }
  .nav-links {
    display: none;
  }
}