/* ================================================================
 * 转区中心 - 红金传奇风格 v2.0 (2026-05-13)
 * mobile-first 360-480px 优先；≥600px 桌面/平板加宽
 * 纯 CSS 抽象底纹，无外部资源依赖
 * ================================================================ */

:root {
  /* 主色：传奇红 + 暗金 */
  --c-primary:       #c8392b;
  --c-primary-dark:  #8d2418;
  --c-primary-soft:  #f5e2dd;
  --c-gold:          #d4af37;
  --c-gold-dark:     #a8861d;
  --c-gold-light:    #e8d488;
  --c-gold-soft:     #f5ecd0;

  /* 底色 / 墨色 */
  --c-bg:            #f5f1ea;   /* 米色底，替代工具灰 */
  --c-bg-dark:       #2a1f17;   /* 深棕，sidebar / 强调块 */
  --c-card:          #fffdf8;   /* 米白卡片 */
  --c-ink:           #2a2418;   /* 主文字 */
  --c-ink-soft:      #5a4f3e;   /* 次文字 */
  --c-ink-muted:     #8a7a60;   /* muted 文字 */
  --c-line:          #e0d4b5;   /* 米黄分隔线 */
  --c-line-soft:     #efe8d6;

  /* 反馈色 */
  --c-success:       #5a7b3e;
  --c-success-bg:    #f0f5e6;
  --c-danger:        #c83a2a;
  --c-danger-bg:     #fbeae6;
  --c-info:          #7a5e2a;
  --c-info-bg:       #f5ecd0;

  /* 阴影 */
  --shadow-card:     0 1px 3px rgba(90, 60, 20, 0.06), 0 0 0 1px rgba(212, 175, 55, 0.18);
  --shadow-card-hover: 0 4px 12px rgba(90, 60, 20, 0.10), 0 0 0 1px rgba(212, 175, 55, 0.35);
  --shadow-card-strong: 0 2px 8px rgba(90, 60, 20, 0.10), 0 0 0 1px rgba(212, 175, 55, 0.5);

  /* 圆角 */
  --r-sm: 4px;
  --r-md: 6px;
  --r-lg: 10px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }

body {
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--c-ink);
  background: var(--c-bg);
  -webkit-text-size-adjust: 100%;
  display: flex;
  min-height: 100vh;
  position: relative;
}

/* ============= 抽象底纹（纯 CSS，无图片） ============= */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    /* 左上柔光（红） */
    radial-gradient(ellipse 600px 400px at 5% -5%, rgba(200, 57, 43, 0.05), transparent 60%),
    /* 右下柔光（金） */
    radial-gradient(ellipse 800px 600px at 105% 105%, rgba(212, 175, 55, 0.07), transparent 55%),
    /* 对角细网格 */
    repeating-linear-gradient(
      135deg,
      transparent 0,
      transparent 22px,
      rgba(212, 175, 55, 0.03) 22px,
      rgba(212, 175, 55, 0.03) 23px
    ),
    /* 反向更稀疏网格 */
    repeating-linear-gradient(
      45deg,
      transparent 0,
      transparent 80px,
      rgba(200, 57, 43, 0.018) 80px,
      rgba(200, 57, 43, 0.018) 81px
    ),
    var(--c-bg);
}

/* 标题用宋体（系统内置 fallback chain，零外部请求） */
h1, h2, h3, .brand, .hero h1 {
  font-family: "Songti SC", "STSong", "SimSun", "宋体", serif;
  letter-spacing: 0.5px;
}

a { color: var(--c-primary); text-decoration: none; }
a:active { opacity: 0.7; }
a:hover { color: var(--c-primary-dark); }

/* ============= 左侧固定竖排导航 ============= */
.sidebar {
  width: 96px;
  flex-shrink: 0;
  background: linear-gradient(180deg, #2a1f17 0%, #1f1610 100%);
  border-right: 1px solid var(--c-gold-dark);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  transition: width 0.2s, transform 0.2s;
  box-shadow: 2px 0 8px rgba(0, 0, 0, 0.15);
}

/* sidebar 内顶部金色细线装饰 */
.sidebar::before {
  content: "";
  display: block;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--c-gold), transparent);
  flex-shrink: 0;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 99;
}

.hamburger {
  background: transparent;
  border: 0;
  font-size: 22px;
  line-height: 1;
  padding: 6px 10px;
  margin-right: 8px;
  cursor: pointer;
  color: var(--c-ink-soft);
  font-family: inherit;
}
.hamburger:active { opacity: 0.6; }

@media (min-width: 600px) {
  html.sidebar-closed .sidebar {
    width: 0;
    border-right: 0;
    overflow: hidden;
  }
  html.sidebar-closed .sidebar > * { display: none; }
}

@media (max-width: 599px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    box-shadow: 4px 0 16px rgba(0, 0, 0, 0.4);
  }
  html.sidebar-closed .sidebar { transform: translateX(-100%); }
  html.sidebar-closed .sidebar-overlay { display: none; }
  html.sidebar-open .sidebar-overlay { display: block; }
  .main-col { width: 100%; }
}

.sidebar .brand {
  display: block;
  padding: 18px 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-gold);
  text-align: center;
  border-bottom: 1px solid rgba(212, 175, 55, 0.25);
  line-height: 1.3;
  text-shadow: 0 1px 0 rgba(0,0,0,0.4);
}

.side-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 10px 0;
}
.side-nav a {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 6px;
  color: #c4b896;
  font-size: 12px;
  text-align: center;
  border-left: 3px solid transparent;
  transition: background 0.1s, color 0.1s;
}
.side-nav a:hover { color: var(--c-gold-light); }
.side-nav a:active { background: rgba(212, 175, 55, 0.08); }
.side-nav a.active {
  color: var(--c-gold);
  background: linear-gradient(90deg, rgba(212, 175, 55, 0.12), transparent);
  border-left-color: var(--c-gold);
  font-weight: 500;
}
.side-nav .num {
  font-size: 22px;
  font-weight: bold;
  margin-bottom: 4px;
  display: block;
  color: inherit;
}
.side-nav .lab {
  font-size: 12px;
  line-height: 1.25;
}

.side-foot {
  padding: 12px 6px;
  border-top: 1px solid rgba(212, 175, 55, 0.2);
  text-align: center;
  font-size: 11px;
  color: #8a7a60;
  word-break: break-all;
}
.side-foot small { color: inherit; }

@media (min-width: 600px) {
  .sidebar { width: 210px; }
  .sidebar .brand { font-size: 19px; padding: 22px 12px; letter-spacing: 1px; }
  .side-nav a {
    flex-direction: row;
    align-items: center;
    text-align: left;
    padding: 14px 18px;
    font-size: 15px;
  }
  .side-nav .num {
    font-size: 20px;
    margin: 0 14px 0 0;
    flex-shrink: 0;
  }
  .side-nav .lab {
    font-size: 15px;
    line-height: 1.3;
  }
  .side-nav .lab br { display: none; }
  .side-foot { font-size: 13px; padding: 16px; }
}

/* ============= 右侧主内容区 ============= */
.main-col {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  padding: 10px 16px;
  background: var(--c-card);
  border-bottom: 1px solid var(--c-line);
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 46px;
  box-shadow: 0 2px 8px rgba(90, 60, 20, 0.04);
}
/* topbar 底部金色细线点缀 */
.topbar::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-gold), transparent);
  opacity: 0.5;
}
.topbar .hello { font-size: 14px; color: var(--c-ink); }
.topbar .muted { color: var(--c-ink-muted); }
.topbar-spacer { flex: 1; }
.topbar .top-link {
  color: var(--c-primary);
  font-size: 14px;
  padding: 6px 10px;
  border-radius: var(--r-sm);
}
.topbar .top-link:active { background: var(--c-primary-soft); }

.container {
  flex: 1;
  padding: 16px 14px;
  max-width: 820px;
  width: 100%;
  margin: 0 auto;
}

/* ============= cards / sections ============= */
.hero {
  position: relative;
  padding: 30px 20px 26px;
  text-align: center;
  background: var(--c-card);
  border-radius: var(--r-lg);
  margin-bottom: 16px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
/* hero 顶部金色细线 + 底部金色细线 */
.hero::before, .hero::after {
  content: "";
  position: absolute;
  left: 12%; right: 12%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--c-gold), transparent);
}
.hero::before { top: 8px; }
.hero::after  { bottom: 8px; }
.hero h1 {
  margin: 0 0 10px;
  font-size: 24px;
  color: var(--c-primary);
  font-weight: 700;
  text-shadow: 0 1px 0 rgba(212, 175, 55, 0.15);
}
.hero .lead {
  color: var(--c-ink);
  margin: 0 0 8px;
  font-size: 15px;
}
.hero .lead b { color: var(--c-primary-dark); }
.hero .muted {
  color: var(--c-ink-muted);
  margin: 0 0 14px;
  font-size: 13px;
}

.features { display: grid; gap: 12px; }

.card {
  background: var(--c-card);
  border-radius: var(--r-lg);
  padding: 18px 16px;
  box-shadow: var(--shadow-card);
  margin-bottom: 12px;
  transition: box-shadow 0.15s;
}
.card:hover { box-shadow: var(--shadow-card-hover); }
.card h2 { margin: 0 0 12px; font-size: 19px; color: var(--c-ink); }
.card h3 {
  margin: 16px 0 8px;
  font-size: 16px;
  color: var(--c-primary);
  font-weight: 600;
}
.card h3:first-child { margin-top: 0; }
.card p { margin: 0 0 8px; color: var(--c-ink-soft); font-size: 14px; }

/* ============= form ============= */
.form-card {
  background: var(--c-card);
  border-radius: var(--r-lg);
  padding: 24px 18px;
  box-shadow: var(--shadow-card);
  position: relative;
}
.form-card::before {
  content: "";
  position: absolute;
  top: 0; left: 14%; right: 14%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--c-gold), transparent);
  border-radius: 0 0 3px 3px;
}
.form-card h2 { margin: 0 0 14px; color: var(--c-primary); }

form label {
  display: block;
  margin: 14px 0 6px;
  color: var(--c-ink-soft);
  font-size: 14px;
  font-weight: 500;
}
form input[type=text],
form input[type=number],
form input[type=password],
form select,
form textarea {
  display: block;
  width: 100%;
  padding: 12px 14px;
  font-size: 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: #fff;
  color: var(--c-ink);
  -webkit-appearance: none;
  appearance: none;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}
form input:focus,
form select:focus,
form textarea:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(200, 57, 43, 0.12);
}
form input[type=number] { -moz-appearance: textfield; }
form input::-webkit-inner-spin-button,
form input::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }

.help-text { font-size: 13px; color: var(--c-ink-muted); margin: 8px 0 0; }
.muted { color: var(--c-ink-muted); font-size: 13px; }

/* ============= details 折叠 ============= */
details {
  margin: 14px 0;
  padding: 14px 16px;
  background: var(--c-gold-soft);
  border-radius: var(--r-md);
  border: 1px solid var(--c-line);
}
details > summary {
  cursor: pointer;
  font-size: 14px;
  color: var(--c-primary);
  list-style: none;
  user-select: none;
  font-weight: 500;
}
details > summary::-webkit-details-marker { display: none; }
details > summary::before {
  content: '▶ ';
  font-size: 10px;
  color: var(--c-gold-dark);
  margin-right: 4px;
}
details[open] > summary::before { content: '▼ '; }

/* ============= buttons ============= */
.btn {
  display: inline-block;
  padding: 11px 18px;
  font-size: 16px;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.12s;
  background: var(--c-card);
  color: var(--c-primary);
  font-family: inherit;
  font-weight: 500;
  line-height: 1.4;
}
.btn:active { transform: translateY(1px); opacity: 0.85; }

.btn-primary {
  background: linear-gradient(180deg, var(--c-primary), var(--c-primary-dark));
  color: #fff;
  border-color: var(--c-primary-dark);
  box-shadow: 0 1px 2px rgba(141, 36, 24, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.15);
}
.btn-primary:hover {
  background: linear-gradient(180deg, #d44734, var(--c-primary-dark));
  color: #fff;
}
.btn-primary:disabled {
  background: #c8b8a5;
  border-color: #b0a08c;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-lg { padding: 14px 22px; font-size: 17px; }
.btn-block { display: block; width: 100%; margin-top: 14px; }
.btn-link {
  background: transparent;
  border-color: transparent;
  padding: 10px 8px;
  font-weight: 400;
}
.btn-link:hover { background: var(--c-gold-soft); }

.btn-danger {
  background: linear-gradient(180deg, #d44734, #8d2418);
  color: #fff;
  border-color: #8d2418;
}

/* 金色描边次级按钮（用于规则页/链接式 CTA） */
.btn-outline {
  background: var(--c-card);
  color: var(--c-primary);
  border: 1px solid var(--c-gold);
}
.btn-outline:hover { background: var(--c-gold-soft); }

/* ============= alert ============= */
.alert {
  padding: 12px 14px;
  border-radius: var(--r-md);
  margin: 12px 0;
  font-size: 14px;
  word-break: break-word;
  border: 1px solid transparent;
}
.alert-error {
  background: var(--c-danger-bg);
  color: var(--c-danger);
  border-color: rgba(200, 58, 42, 0.3);
}
.alert-success {
  background: var(--c-success-bg);
  color: var(--c-success);
  border-color: rgba(90, 123, 62, 0.3);
}
.alert-info {
  background: var(--c-info-bg);
  color: var(--c-info);
  border-color: rgba(168, 134, 29, 0.35);
}

/* ============= rules ============= */
.rules h3 {
  margin-top: 22px;
  color: var(--c-primary);
  font-family: "Songti SC", "STSong", "SimSun", "宋体", serif;
}
.rules ol > li { margin-bottom: 10px; }
.rules ul { margin: 6px 0; padding-left: 20px; }
.rules ol > li::marker { color: var(--c-gold-dark); font-weight: bold; }

/* ============= countdown ============= */
.countdown {
  font-weight: bold;
  color: var(--c-primary);
  font-family: "SF Mono", "Consolas", monospace;
}

/* ============= 进度条（5 步 stepper） ============= */
.progress-card {
  padding: 18px 14px 14px;
}
.progress-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  gap: 8px;
  flex-wrap: wrap;
}
.progress-card-head h2 {
  font-size: 17px;
  font-family: "Songti SC", "STSong", "SimSun", serif;
  color: var(--c-ink);
}

.progress-stepper {
  display: flex;
  align-items: flex-start;
  gap: 0;
  padding: 4px 2px;
}
.stepper-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 0 0 auto;
  width: 58px;
  text-align: center;
  position: relative;
}
.stepper-dot {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: bold;
  border: 2px solid var(--c-line);
  background: var(--c-card);
  color: var(--c-ink-muted);
  margin-bottom: 6px;
  font-family: "SF Mono", "Consolas", monospace;
  transition: all 0.2s;
}
.stepper-lab {
  font-size: 12px;
  color: var(--c-ink-soft);
  line-height: 1.2;
  font-weight: 500;
}
.stepper-sub {
  font-size: 10px;
  color: var(--c-ink-muted);
  margin-top: 2px;
  line-height: 1.1;
}
.stepper-bar {
  flex: 1;
  height: 2px;
  background: var(--c-line);
  margin: 14px -2px 0;
  min-width: 6px;
  align-self: flex-start;
  border-radius: 1px;
}
.stepper-bar.done { background: var(--c-gold); }

.stepper-item.done .stepper-dot {
  background: var(--c-gold);
  color: #fff;
  border-color: var(--c-gold-dark);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.12);
}
.stepper-item.done .stepper-lab { color: var(--c-ink); }

.stepper-item.current .stepper-dot {
  background: var(--c-primary);
  color: #fff;
  border-color: var(--c-primary-dark);
  box-shadow: 0 0 0 4px rgba(200, 57, 43, 0.18);
  animation: pulse-dot 1.8s ease-in-out infinite;
}
.stepper-item.current .stepper-lab {
  color: var(--c-primary);
  font-weight: 600;
}
.stepper-item.current .stepper-sub { color: var(--c-primary-dark); }

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 4px rgba(200, 57, 43, 0.18); }
  50%      { box-shadow: 0 0 0 8px rgba(200, 57, 43, 0.08); }
}

/* ============= CTA 卡片网格 ============= */
.cta-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 16px;
}
.cta-card {
  display: grid;
  grid-template-columns: 48px 1fr;
  align-items: center;
  gap: 10px 14px;
  padding: 18px 16px;
  background: var(--c-card);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  text-decoration: none;
  color: var(--c-ink);
  transition: all 0.15s;
  border: 1px solid transparent;
}
.cta-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-1px);
}
.cta-card:active { transform: translateY(0); opacity: 0.9; }
.cta-icon {
  grid-row: span 2;
  font-size: 32px;
  text-align: center;
  line-height: 1;
}
.cta-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
  align-self: end;
  line-height: 1.2;
}
.cta-sub {
  font-size: 13px;
  color: var(--c-ink-muted);
  align-self: start;
  line-height: 1.2;
}
.cta-primary {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-dark) 100%);
  border-color: var(--c-primary-dark);
  color: #fff;
  box-shadow: 0 2px 6px rgba(141, 36, 24, 0.2), 0 0 0 1px rgba(212, 175, 55, 0.4);
}
.cta-primary:hover {
  box-shadow: 0 4px 14px rgba(141, 36, 24, 0.32), 0 0 0 1px var(--c-gold);
  color: #fff;
}
.cta-primary .cta-title { color: #fff; }
.cta-primary .cta-sub { color: rgba(255, 255, 255, 0.85); }
.cta-primary .cta-icon { filter: drop-shadow(0 1px 2px rgba(0,0,0,0.25)); }

/* ============= 信任栏 ============= */
.trust-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  padding: 16px 12px;
  margin-top: 4px;
  background: var(--c-card);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  position: relative;
}
.trust-bar::before {
  content: "";
  position: absolute;
  top: 0; left: 18%; right: 18%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--c-gold), transparent);
}
.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}
.trust-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  top: 15%;
  bottom: 15%;
  width: 1px;
  background: var(--c-line);
}
.trust-num {
  font-size: 22px;
  font-weight: bold;
  color: var(--c-primary);
  font-family: "Songti SC", "STSong", "SimSun", serif;
  line-height: 1.1;
}
.trust-lab {
  font-size: 11px;
  color: var(--c-ink-muted);
  margin-top: 4px;
  line-height: 1.2;
}

/* ============= 小徽章 ============= */
.badge-success {
  display: inline-block;
  padding: 2px 10px;
  background: var(--c-success-bg);
  color: var(--c-success);
  border: 1px solid rgba(90, 123, 62, 0.4);
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

/* ============= responsive ============= */
@media (min-width: 600px) {
  .cta-grid { grid-template-columns: repeat(3, 1fr); }
  .cta-icon { font-size: 36px; }
  .progress-stepper { padding: 8px 8px 4px; }
  .stepper-item { width: 80px; }
  .stepper-lab { font-size: 13px; }
  .stepper-sub { font-size: 11px; }
  .trust-num { font-size: 26px; }
  .trust-lab { font-size: 13px; }
}

/* ============= toast ============= */
.toast-host {
  position: fixed;
  top: 60px;
  right: 14px;
  left: 14px;
  max-width: 480px;
  margin: 0 auto;
  z-index: 9999;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
@media (min-width: 600px) {
  .toast-host { left: auto; right: 20px; top: 70px; max-width: 380px; }
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 12px 14px;
  background: var(--c-card);
  border-radius: var(--r-md);
  box-shadow: 0 4px 18px rgba(90, 60, 20, 0.16), 0 0 0 1px rgba(212, 175, 55, 0.4);
  font-size: 14px;
  line-height: 1.45;
  color: var(--c-ink);
  border-left: 4px solid var(--c-gold);
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.2s, transform 0.2s;
}
.toast.toast-in  { opacity: 1; transform: translateY(0); }
.toast.toast-out { opacity: 0; transform: translateY(-8px); }
.toast-success { border-left-color: var(--c-success); }
.toast-error   { border-left-color: var(--c-danger); background: #fff5f3; }
.toast-info    { border-left-color: var(--c-info); }
.toast-msg { flex: 1; word-break: break-word; }
.toast-x {
  background: transparent;
  border: 0;
  font-size: 18px;
  line-height: 1;
  color: var(--c-ink-muted);
  cursor: pointer;
  padding: 0 4px;
  margin-left: 4px;
}
.toast-x:hover { color: var(--c-primary); }

/* ============= 手机端 sticky CTA ============= */
@media (max-width: 599px) {
  .sticky-cta-wrap {
    position: sticky;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 12px 14px calc(12px + env(safe-area-inset-bottom));
    margin: 14px -14px -14px;
    background: linear-gradient(180deg, rgba(245, 241, 234, 0), var(--c-bg) 30%);
    z-index: 5;
  }
  .sticky-cta-wrap .btn-block { margin-top: 0; }
}
@media (min-width: 600px) {
  .sticky-cta-wrap { padding: 0; margin: 14px 0 0; background: transparent; }
}

/* ============= 底部 tab bar（仅手机端） ============= */
.bottom-tabbar {
  display: none;
}
@media (max-width: 599px) {
  .bottom-tabbar {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--c-card);
    border-top: 1px solid var(--c-gold-dark);
    box-shadow: 0 -2px 8px rgba(90, 60, 20, 0.10);
    z-index: 50;
    padding: 6px 0 calc(6px + env(safe-area-inset-bottom));
  }
  .bottom-tabbar::before {
    content: "";
    position: absolute;
    left: 0; right: 0; top: -1px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-gold), transparent);
  }
  .bottom-tabbar a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 4px 2px;
    color: var(--c-ink-soft);
    font-size: 11px;
    text-decoration: none;
    transition: color 0.1s;
  }
  .bottom-tabbar a:active { color: var(--c-primary-dark); }
  .bottom-tabbar a.active { color: var(--c-primary); }
  .bottom-tabbar a.active .bt-icon { transform: scale(1.1); }
  .bottom-tabbar .bt-icon {
    font-size: 22px;
    line-height: 1;
    transition: transform 0.15s;
  }
  .bottom-tabbar .bt-lab { font-size: 11px; line-height: 1; }
  /* 给主内容兜底 padding 防底栏遮挡 */
  .container { padding-bottom: 76px; }
}

/* ============= FAB 客服气泡 ============= */
.fab-cs {
  position: fixed;
  right: 14px;
  bottom: 86px;  /* 避开 bottom-tabbar */
  z-index: 80;
}
@media (min-width: 600px) {
  .fab-cs { bottom: 24px; right: 24px; }
}
.fab-cs-btn {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
  color: #fff;
  border: 1px solid var(--c-gold);
  border-radius: 50%;
  width: 56px;
  height: 56px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  font-size: 10px;
  box-shadow: 0 4px 14px rgba(141, 36, 24, 0.30), 0 0 0 2px rgba(212, 175, 55, 0.3);
  font-family: inherit;
  line-height: 1;
  transition: transform 0.12s;
}
.fab-cs-btn:hover { transform: translateY(-2px); }
.fab-cs-btn:active { transform: scale(0.95); }
.fab-cs-icon { font-size: 22px; }
.fab-cs-lab { font-size: 10px; margin-top: 2px; opacity: 0.9; }

.fab-cs-panel {
  position: absolute;
  right: 0;
  bottom: 68px;
  width: 240px;
  background: var(--c-card);
  border-radius: var(--r-lg);
  padding: 16px;
  box-shadow: 0 8px 26px rgba(90, 60, 20, 0.20), 0 0 0 1px var(--c-gold);
  display: none;
  font-size: 14px;
}
.fab-cs-panel.open { display: block; animation: fab-pop 0.18s ease-out; }
@keyframes fab-pop {
  from { opacity: 0; transform: translateY(8px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.fab-cs-head {
  font-weight: 600;
  font-size: 15px;
  color: var(--c-primary);
  margin-bottom: 8px;
  font-family: "Songti SC", "STSong", "SimSun", serif;
}
.fab-cs-panel p { margin: 6px 0; color: var(--c-ink-soft); }
.fab-cs-wx {
  background: var(--c-gold-soft);
  border: 1px dashed var(--c-gold-dark);
  border-radius: var(--r-md);
  padding: 10px;
  margin: 10px 0;
  font-family: "SF Mono", "Consolas", monospace;
  font-size: 16px;
  color: var(--c-primary-dark);
  text-align: center;
  word-break: break-all;
  font-weight: 600;
}

/* ============= SVG ring countdown ============= */
.cd-ring {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  vertical-align: middle;
  position: relative;
  margin-right: 6px;
}
.cd-ring svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg); /* 12 点起步 */
}
.cd-ring-bg {
  fill: none;
  stroke: var(--c-line);
  stroke-width: 3;
}
.cd-ring-fg {
  fill: none;
  stroke: var(--c-primary);
  stroke-width: 3;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.95s linear;
}
.cd-ring-num {
  font-family: "SF Mono", "Consolas", monospace;
  font-weight: 700;
  font-size: 14px;
  color: var(--c-primary);
  z-index: 1;
}
.cd-ring-text {
  display: inline-block;
  vertical-align: middle;
  color: var(--c-ink-muted);
  font-size: 13px;
}

/* ============= FAQ section (rules 页顶部) ============= */
.faq-section .faq-item {
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  margin: 8px 0;
  background: var(--c-gold-soft);
  padding: 0;
  transition: background 0.15s;
}
.faq-section .faq-item[open] { background: var(--c-card); }
.faq-section .faq-q {
  padding: 12px 14px;
  font-weight: 600;
  font-size: 14px;
  color: var(--c-primary);
  cursor: pointer;
  list-style: none;
}
.faq-section .faq-q::-webkit-details-marker { display: none; }
.faq-section .faq-q::before {
  content: 'Q · ';
  color: var(--c-gold-dark);
  font-weight: 700;
}
.faq-section .faq-q::after {
  content: ' ▾';
  float: right;
  color: var(--c-gold-dark);
  transition: transform 0.2s;
}
.faq-section .faq-item[open] .faq-q::after { content: ' ▴'; }
.faq-section .faq-a {
  padding: 4px 14px 14px;
  font-size: 14px;
  color: var(--c-ink-soft);
  line-height: 1.55;
}
.faq-section .faq-a::before {
  content: 'A · ';
  color: var(--c-gold-dark);
  font-weight: 700;
}
.faq-section h2 {
  text-align: center;
  font-family: "Songti SC", "STSong", "SimSun", serif;
}

/* ============= responsive 极窄屏 ============= */
@media (max-width: 359px) {
  .sidebar { width: 84px; }
  .side-nav .num { font-size: 18px; }
  .side-nav .lab { font-size: 11px; }
  .hero { padding: 24px 14px 22px; }
  .hero h1 { font-size: 20px; }
  .stepper-item { width: 50px; }
  .stepper-dot { width: 26px; height: 26px; font-size: 12px; }
  .stepper-lab { font-size: 11px; }
  .stepper-sub { font-size: 9px; }
  .stepper-bar { margin-top: 12px; }
  .trust-num { font-size: 19px; }
  .cta-card { padding: 14px 12px; }
  .cta-icon { font-size: 28px; }
  .cta-title { font-size: 15px; }
}