@import url('https://fonts.googleapis.cn/css2?family=Noto+Serif+SC:wght@500;600;700;900&family=Noto+Sans+SC:wght@400;500;700&family=Playfair+Display:ital,wght@0,600;0,700;1,600&display=swap');

/* ================= Design Tokens ================= */
:root {
  --navy: #0a1f44;
  --navy-deep: #071633;
  --royal: #143a7c;
  --royal-bright: #1b4fa0;
  --blue-gray: #eef3fb;
  --gold: #c9a24b;
  --gold-light: #f0d78c;
  --gold-dark: #a8822f;
  --gold-grad: linear-gradient(135deg, #f0d78c 0%, #c9a24b 48%, #a8822f 100%);
  --warm-white: #fbf8f0;
  --ink: #24324c;
  --ink-soft: #4c5d7a;
  --hairline: rgba(201, 162, 75, 0.45);
  --shadow: 0 8px 24px rgba(10, 31, 68, 0.08);
  --shadow-deep: 0 12px 32px rgba(7, 22, 51, 0.35);
  --gold-glow: 0 6px 20px rgba(201, 162, 75, 0.18);
  --serif-cn: 'Noto Serif SC', 'Songti SC', serif;
  --serif-en: 'Playfair Display', 'Noto Serif SC', serif;
  --sans: 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

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

body {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  background: var(--warm-white);
  -webkit-font-smoothing: antialiased;
}

.page {
  overflow-x: hidden;
}

.wrap {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ================= 通用元素 ================= */
.gold-text {
  background: var(--gold-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.serif-cn {
  font-family: var(--serif-cn);
}

.section {
  padding: 56px 0;
}

.section-warm {
  background: var(--warm-white);
}

.section-navy {
  background:
    radial-gradient(120% 60% at 50% 0%, rgba(27, 79, 160, 0.35) 0%, transparent 60%),
    linear-gradient(180deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: #eef3fb;
}

.section-blue {
  background:
    radial-gradient(120% 60% at 50% 100%, rgba(27, 79, 160, 0.28) 0%, transparent 60%),
    linear-gradient(180deg, #0d2652 0%, var(--navy) 100%);
  color: #eef3fb;
}

.section-head {
  text-align: center;
  margin-bottom: 32px;
}

.section-head h2 {
  font-family: var(--serif-cn);
  font-size: 27px;
  font-weight: 900;
  letter-spacing: 1px;
  margin-top: 8px;
}

.section-navy .section-head h2,
.section-blue .section-head h2,
.footer .section-head h2 {
  color: #fdf6e3;
}

.section-kicker {
  font-family: var(--serif-en);
  font-size: 11px;
  letter-spacing: 4px;
  font-weight: 600;
  color: var(--gold-dark);
  display: inline-block;
}

.section-kicker.light {
  color: var(--gold-light);
}

.title-rule {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 14px;
}

.title-rule span {
  width: 42px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold));
}

.title-rule span:last-child {
  background: linear-gradient(90deg, var(--gold), transparent);
}

.title-rule i {
  font-style: normal;
  font-size: 9px;
  color: var(--gold);
}

.section-tip {
  margin-top: 12px;
  font-size: 12.5px;
  color: rgba(238, 243, 251, 0.65);
  letter-spacing: 0.5px;
}

/* ================= 1. Hero ================= */
.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  text-align: center;
  color: #fff;
  padding: 56px 0 64px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url('/public/images/banner.jpg') center 30% / cover no-repeat;
}

.hero-mask {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(7, 22, 51, 0.82) 0%, rgba(10, 31, 68, 0.62) 42%, rgba(10, 31, 68, 0.92) 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
}

.hero-brand {
  font-family: var(--serif-en);
  font-size: 13px;
  letter-spacing: 6px;
  color: var(--gold-light);
  margin-bottom: 22px;
  opacity: 0.9;
}

.hero-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--navy);
  background: var(--gold-grad);
  padding: 5px 16px;
  border-radius: 999px;
  box-shadow: var(--gold-glow);
  margin-bottom: 22px;
}

.hero-title {
  font-family: var(--serif-cn);
  font-size: clamp(29px, 8.2vw, 36px);
  font-weight: 900;
  line-height: 1.34;
  letter-spacing: 1px;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
}

/* 长标题行强制单行不折行，小屏靠流式字号自适应 */
.hero-title .gold {
  display: block;
  white-space: nowrap;
  font-size: clamp(26px, 7.4vw, 34px);
  letter-spacing: 0.5px;
}

.hero-sub {
  margin-top: 20px;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, 0.92);
}

.hero-tag {
  margin-top: 8px;
  display: inline-block;
  font-family: var(--serif-cn);
  font-size: 15px;
  font-weight: 700;
  color: var(--gold-light);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: 6px 18px;
  letter-spacing: 3px;
}

.hero-stats {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  border: 1px solid var(--hairline);
  border-radius: 14px;
  background: rgba(7, 22, 51, 0.45);
  backdrop-filter: blur(4px);
  padding: 14px 4px;
}

.hero-stat {
  min-width: 0;
}

.hero-stat strong {
  display: flex;
  align-items: baseline;
  justify-content: center;
  white-space: nowrap;
  font-family: var(--serif-en);
  font-size: clamp(17px, 5vw, 24px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0;
}

.hero-stat strong em {
  font-style: normal;
  font-size: 0.58em;
  margin-left: 1px;
  white-space: nowrap;
}

.hero-stat span {
  display: block;
  margin-top: 5px;
  font-size: clamp(10px, 2.8vw, 11.5px);
  color: rgba(255, 255, 255, 0.72);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.hero-scroll {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  width: 22px;
  height: 22px;
  border-right: 1.5px solid var(--gold);
  border-bottom: 1.5px solid var(--gold);
  transform: translateX(-50%) rotate(45deg);
  opacity: 0.7;
  animation: scrollHint 1.8s ease-in-out infinite;
}

@keyframes scrollHint {
  0%, 100% { margin-bottom: 0; opacity: 0.4; }
  50% { margin-bottom: 8px; opacity: 0.9; }
}

/* ================= 2. 适合人群 ================= */
.audience-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.aud-card {
  background: #fff;
  border: 1px solid #dde6f4;
  border-radius: 14px;
  padding: 20px 16px;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.aud-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(10, 31, 68, 0.12);
  border-color: var(--gold);
}

.aud-icon {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--blue-gray);
  color: var(--royal);
  margin-bottom: 12px;
}

.aud-icon svg {
  width: 22px;
  height: 22px;
}

.aud-card h3 {
  font-family: var(--serif-cn);
  font-size: 16.5px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 6px;
}

.aud-card p {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ================= 3. 师资 ================= */
.teacher-card {
  background: linear-gradient(160deg, rgba(20, 58, 124, 0.95) 0%, rgba(10, 31, 68, 0.98) 100%);
  border: 1px solid var(--hairline);
  border-radius: 16px;
  padding: 24px 20px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-deep);
  transition: transform 0.3s ease;
}

.teacher-card:hover {
  transform: translateY(-3px);
}

.teacher-top {
  display: flex;
  align-items: center;
  gap: 14px;
}

.teacher-photo {
  flex: none;
  width: 88px;
  height: 88px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--navy-deep);
  box-shadow: 0 0 0 2px var(--gold), 0 6px 18px rgba(201, 162, 75, 0.28);
}

.teacher-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.teacher-id {
  flex: 1;
  min-width: 0;
}

.teacher-id h3 {
  font-family: var(--serif-cn);
  font-size: 20px;
  font-weight: 900;
  color: #fdf6e3;
  line-height: 1.3;
}

.teacher-id .en {
  font-family: var(--serif-en);
  font-size: 14px;
  font-weight: 600;
  color: var(--gold-light);
  margin-left: 4px;
}

.teacher-role {
  margin-top: 2px;
  font-size: 12.5px;
  color: rgba(238, 243, 251, 0.7);
}

.teacher-tag {
  display: inline-block;
  margin-top: 8px;
  font-size: 11px;
  font-weight: 700;
  color: var(--navy);
  background: var(--gold-grad);
  padding: 3px 11px;
  border-radius: 999px;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.teacher-desc {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.9;
  color: rgba(238, 243, 251, 0.88);
}

.teacher-desc strong {
  font-weight: 700;
}

.teacher-stats {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  text-align: center;
  border-top: 1px solid rgba(201, 162, 75, 0.25);
  padding-top: 16px;
}

.teacher-stats strong {
  display: block;
  font-family: var(--serif-en);
  font-size: 26px;
  font-weight: 700;
}

.teacher-stats strong em {
  font-style: normal;
  font-size: 13px;
}

.teacher-stats span {
  font-size: 12px;
  color: rgba(238, 243, 251, 0.68);
}

.teacher-honors {
  margin-top: 16px;
  list-style: none;
  border-top: 1px solid rgba(201, 162, 75, 0.25);
  padding-top: 14px;
}

.teacher-honors li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  color: rgba(238, 243, 251, 0.85);
  line-height: 2;
}

.teacher-honors li::before {
  content: '◆';
  position: absolute;
  left: 0;
  top: 2px;
  font-size: 8px;
  color: var(--gold);
}

/* ================= 4. 五大亮点 ================= */
.adv-card {
  position: relative;
  display: flex;
  gap: 14px;
  background: linear-gradient(160deg, var(--royal) 0%, var(--navy) 100%);
  border: 1px solid rgba(201, 162, 75, 0.55);
  border-radius: 14px;
  padding: 20px 18px 20px 16px;
  margin-bottom: 14px;
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.adv-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(240, 215, 140, 0.12) 0%, transparent 40%);
  pointer-events: none;
}

.adv-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--gold-glow), var(--shadow);
}

.adv-badge {
  flex: none;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-light);
  background:
    radial-gradient(circle at 32% 28%, rgba(240, 215, 140, 0.28), transparent 60%),
    var(--navy-deep);
  border: 1.5px solid var(--gold);
  box-shadow: 0 4px 12px rgba(201, 162, 75, 0.25), inset 0 0 8px rgba(201, 162, 75, 0.18);
}

.adv-badge svg {
  width: 22px;
  height: 22px;
}

.adv-body h3 {
  font-family: var(--serif-cn);
  font-size: 16.5px;
  font-weight: 700;
  color: #fdf6e3;
  margin-bottom: 6px;
}

.adv-body p {
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(238, 243, 251, 0.85);
}

.adv-body strong {
  color: var(--gold-light);
  font-weight: 700;
}

/* ================= 5 / 9. 折叠面板 ================= */
.acc-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.acc-item {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(201, 162, 75, 0.35);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.acc-item.open {
  border-color: var(--gold);
  background: rgba(255, 255, 255, 0.1);
}

.acc-item-hot {
  border-color: var(--gold);
  box-shadow: var(--gold-glow);
}

.acc-head {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 17px 16px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  color: #fdf6e3;
  font-family: var(--serif-cn);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.acc-no {
  flex: none;
  font-size: 18px;
  color: var(--gold-light);
}

.acc-title {
  flex: 1;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.hot-tag {
  font-family: var(--sans);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--navy);
  background: var(--gold-grad);
  padding: 2px 9px;
  border-radius: 999px;
}

.chevron {
  flex: none;
  width: 18px;
  height: 18px;
  color: var(--gold);
  transition: transform 0.35s ease;
}

.acc-item.open .chevron {
  transform: rotate(180deg);
}

.acc-body {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.4s ease, opacity 0.35s ease;
}

.acc-item.open .acc-body {
  max-height: 2200px;
  opacity: 1;
}

.acc-content {
  padding: 0 18px 18px;
  border-top: 1px dashed rgba(201, 162, 75, 0.35);
  margin: 0 16px;
  padding-top: 14px;
  font-size: 14px;
  line-height: 1.9;
  color: rgba(238, 243, 251, 0.88);
}

.acc-content ul {
  list-style: none;
  margin-top: 8px;
}

.acc-content li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 5px;
}

.acc-content li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--gold-light);
  font-weight: 700;
  font-size: 13px;
}

.acc-content strong {
  color: var(--gold-light);
  font-weight: 700;
}

/* 课表小节标签与链接 */
.lesson-label {
  margin: 14px 0 6px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--gold);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.lesson-label::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--gold);
  opacity: 0.7;
}

.lesson-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 4px;
}

.lesson-links li {
  padding-left: 0;
  margin-bottom: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.lesson-links li::before {
  content: none;
}

.lesson-links li .day-tag {
  flex: none;
  font-size: 10.5px;
  font-weight: 700;
  color: var(--navy);
  background: linear-gradient(135deg, var(--gold-light), var(--gold));
  border-radius: 5px;
  padding: 1px 7px;
  line-height: 1.6;
}

.lesson-links a {
  color: rgba(238, 243, 251, 0.92);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.5;
  padding: 5px 0 5px 16px;
  position: relative;
  border-bottom: 1px solid rgba(201, 162, 75, 0.14);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.lesson-links a::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--gold);
}

.lesson-links a:hover {
  color: var(--gold-light);
  padding-left: 20px;
}

/* 底部免费试听链接 */
.cta-links {
  margin: 4px 0 6px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  max-width: 340px;
}

.cta-links-title {
  font-size: 13px;
  color: var(--gold-light);
  letter-spacing: 0.04em;
  margin-bottom: 2px;
}

.cta-link {
  display: block;
  text-align: center;
  text-decoration: none;
  font-size: 13.5px;
  color: #eef3fb;
  border: 1px solid rgba(201, 162, 75, 0.5);
  border-radius: 999px;
  padding: 9px 16px;
  background: rgba(20, 58, 124, 0.35);
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.cta-link:hover {
  background: rgba(201, 162, 75, 0.18);
  border-color: var(--gold);
  color: var(--gold-light);
}

/* ================= 6. 上课渠道 ================= */
.channel-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.channel-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #fff;
  border: 1px solid #dde6f4;
  border-radius: 14px;
  padding: 16px;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.channel-item:hover {
  transform: translateY(-2px);
  border-color: var(--gold);
}

.channel-item-wechat {
  border: 1.5px solid var(--gold);
  background: linear-gradient(160deg, #fffdf6 0%, #fbf8f0 100%);
}

.channel-icon {
  flex: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--navy);
  color: var(--gold-light);
}

.channel-icon svg {
  width: 22px;
  height: 22px;
}

.channel-text {
  flex: 1;
  min-width: 0;
}

.channel-text h3 {
  font-family: var(--serif-cn);
  font-size: 15.5px;
  font-weight: 700;
  color: var(--navy);
}

.channel-text p {
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.wechat-id {
  font-family: var(--serif-en);
  color: var(--gold-dark);
  font-size: 14px;
  letter-spacing: 0.5px;
}

.channel-pill {
  flex: none;
  font-size: 11px;
  font-weight: 500;
  color: var(--royal);
  background: var(--blue-gray);
  border: 1px solid #d4e0f2;
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.channel-icon-qr {
  background: var(--gold-grad);
  color: var(--navy);
}

.channel-qr-btn {
  flex: none;
  font-family: var(--sans);
  font-size: 12.5px;
  font-weight: 700;
  color: #20345c;
  background: var(--gold-grad);
  border: none;
  border-radius: 999px;
  padding: 9px 16px;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: var(--gold-glow);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.channel-qr-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(201, 162, 75, 0.4);
}

.channel-qr-btn:active {
  transform: scale(0.96);
}

/* 学习路线步骤序号 */
.channel-step {
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif-en);
  font-size: 17px;
  font-weight: 700;
  color: var(--gold-light);
  background: var(--navy);
  border: 1.5px solid var(--gold);
}

/* ===== 底部二维码卡片 ===== */
.qr-card {
  margin: 18px auto;
  max-width: 260px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(201, 162, 75, 0.6);
  border-radius: 18px;
  padding: 18px 18px 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.28);
}

.qr-img {
  width: 180px;
  max-width: 70vw;
  height: auto;
  border-radius: 10px;
  display: block;
  margin: 0 auto 12px;
  background: #fff;
}

.qr-title {
  font-family: var(--serif-cn);
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 4px;
  text-align: center;
}

.qr-note {
  font-size: 12.5px;
  color: rgba(238, 243, 251, 0.78);
  line-height: 1.7;
  text-align: center;
}

/* ===== 二维码放大弹层 ===== */
.qr-modal {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.qr-modal.show {
  opacity: 1;
  visibility: visible;
}

.qr-modal-mask {
  position: absolute;
  inset: 0;
  background: rgba(6, 15, 33, 0.76);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}

.qr-modal-card {
  position: relative;
  width: min(320px, 86vw);
  background: var(--paper);
  border-radius: 20px;
  border: 1px solid rgba(201, 162, 75, 0.6);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  padding: 26px 22px 22px;
  text-align: center;
  transform: scale(0.92) translateY(10px);
  transition: transform 0.3s ease;
}

.qr-modal.show .qr-modal-card {
  transform: scale(1) translateY(0);
}

.qr-modal-close {
  position: absolute;
  top: 8px;
  right: 10px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--blue-gray);
  color: var(--navy);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-modal-card img {
  width: 100%;
  max-width: 220px;
  height: auto;
  border-radius: 12px;
  display: block;
  margin: 4px auto 14px;
  background: #fff;
}

.qr-modal-title {
  font-family: var(--serif-cn);
  font-size: 17px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 5px;
}

.qr-modal-note {
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* ================= 7. 权益清单 ================= */
.benefit-grid {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.benefit-grid li {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(201, 162, 75, 0.28);
  border-radius: 12px;
  padding: 13px 16px;
  font-size: 14px;
  color: rgba(238, 243, 251, 0.92);
  transition: border-color 0.3s ease;
}

.benefit-grid li:hover {
  border-color: var(--gold);
}

.benefit-check {
  flex: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gold-grad);
  color: var(--navy);
}

.benefit-check svg {
  width: 13px;
  height: 13px;
}

/* ================= 8. 学习建议 ================= */
.step-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.step-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: #fff;
  border: 1px solid #dde6f4;
  border-radius: 14px;
  padding: 18px 16px;
  box-shadow: var(--shadow);
}

.step-no {
  flex: none;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif-en);
  font-size: 17px;
  font-weight: 700;
  color: var(--navy);
  background: var(--gold-grad);
  box-shadow: var(--gold-glow);
}

.step-list h3 {
  font-family: var(--serif-cn);
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
}

.step-list p {
  margin-top: 3px;
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.8;
}

.step-list strong {
  color: var(--gold-dark);
}

/* ================= 10. 底部 ================= */
.footer {
  padding: 56px 0 40px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links li {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(201, 162, 75, 0.28);
  border-radius: 12px;
  padding: 14px 16px;
}

.fl-icon {
  flex: none;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(201, 162, 75, 0.16);
  color: var(--gold-light);
}

.fl-icon svg {
  width: 20px;
  height: 20px;
}

.fl-text {
  flex: 1;
  font-size: 13.5px;
  color: rgba(238, 243, 251, 0.92);
}

.fl-text strong {
  color: var(--gold-light);
  font-family: var(--serif-en);
}

.fl-tag {
  flex: none;
  font-size: 11px;
  color: var(--gold-light);
  border: 1px solid rgba(201, 162, 75, 0.45);
  padding: 3px 9px;
  border-radius: 999px;
  white-space: nowrap;
}

.fl-wechat {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(201, 162, 75, 0.12);
  border: 1px solid var(--gold);
  border-radius: 12px;
  padding: 14px 16px;
  cursor: pointer;
  text-align: left;
  font-family: var(--sans);
  transition: background 0.3s ease;
}

.fl-wechat:hover {
  background: rgba(201, 162, 75, 0.2);
}

.fl-copy {
  flex: none;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--navy);
  background: var(--gold-grad);
  padding: 4px 10px;
  border-radius: 999px;
}

.cta-box {
  margin-top: 36px;
  text-align: center;
  border: 1px solid var(--hairline);
  border-radius: 16px;
  background:
    radial-gradient(100% 80% at 50% 0%, rgba(27, 79, 160, 0.5) 0%, transparent 70%),
    rgba(7, 22, 51, 0.5);
  padding: 32px 22px 28px;
}

.cta-line {
  font-family: var(--serif-cn);
  font-size: 20px;
  font-weight: 900;
  line-height: 1.6;
  color: #fdf6e3;
  letter-spacing: 1px;
}

.cta-btn {
  margin-top: 20px;
  width: 100%;
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--navy);
  background: var(--gold-grad);
  border: none;
  border-radius: 999px;
  padding: 15px 20px;
  cursor: pointer;
  box-shadow: var(--gold-glow);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(201, 162, 75, 0.32);
}

.cta-btn:active {
  transform: scale(0.98);
}

.cta-note {
  margin-top: 12px;
  font-size: 12px;
  color: rgba(238, 243, 251, 0.62);
}

.footer-brand {
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid rgba(201, 162, 75, 0.22);
  text-align: center;
}

.footer-logo {
  font-family: var(--serif-en);
  font-size: 15px;
  letter-spacing: 4px;
  color: var(--gold-light);
}

.footer-slogan {
  margin-top: 8px;
  font-family: var(--serif-cn);
  font-size: 13.5px;
  color: rgba(238, 243, 251, 0.75);
}

.footer-copy {
  margin-top: 10px;
  font-size: 11.5px;
  color: rgba(238, 243, 251, 0.45);
}

/* ================= 入场动效 ================= */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ================= 桌面端适配 ================= */
@media (min-width: 768px) {
  .wrap {
    max-width: 820px;
    padding: 0 32px;
  }

  .section {
    padding: 72px 0;
  }

  .section-head h2 {
    font-size: 32px;
  }

  .hero {
    min-height: 680px;
  }

  .hero-title {
    font-size: 44px;
  }

  .hero-title .gold {
    font-size: 40px;
  }

  .hero-sub {
    font-size: 17px;
  }

  .hero-stats {
    max-width: 560px;
    margin: 44px auto 0;
  }

  .hero-stat strong {
    font-size: 30px;
  }

  .audience-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .teacher-card {
    padding: 32px 28px;
  }

  .adv-card {
    padding: 24px 24px;
    gap: 18px;
  }

  .adv-num {
    font-size: 34px;
  }

  .adv-body h3 {
    font-size: 18px;
  }

  .benefit-grid {
    grid-template-columns: 1fr 1fr;
  }

  .acc-head {
    font-size: 18px;
    padding: 20px 22px;
  }

  .acc-content {
    font-size: 15px;
  }

  .cta-btn {
    width: auto;
    min-width: 420px;
    font-size: 17px;
    padding: 16px 36px;
  }

  .footer-links li,
  .fl-wechat {
    padding: 16px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero-scroll {
    animation: none;
  }

  html {
    scroll-behavior: auto;
  }
}