/* ═══════════════════════════════════════════
   中研弘途教育 - 品牌官网样式表
   主色: #0F3460 深海蓝 | 辅助: #F6F8FA 浅灰
   点缀: #C9A86C 浅金 | 字体: 思源黑体
   ═══════════════════════════════════════════ */

:root {
  --color-primary: #0F3460;
  --color-primary-light: #1a4a7a;
  --color-primary-dark: #0a2540;
  --color-secondary: #F6F8FA;
  --color-accent: #C9A86C;
  --color-accent-light: #d9bc88;
  --color-white: #ffffff;
  --color-text: #1a2332;
  --color-text-light: #5a6577;
  --color-border: #e4e8ed;
  --shadow-sm: 0 2px 8px rgba(15, 52, 96, 0.06);
  --shadow-md: 0 4px 20px rgba(15, 52, 96, 0.08);
  --shadow-lg: 0 12px 40px rgba(15, 52, 96, 0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition: all 0.3s ease;
  --max-width: 1200px;
}

/* ─── Reset & Base ─── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 70px;
}

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 400;
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── 通用按钮 ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  font-size: 16px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(15, 52, 96, 0.3);
}

.btn-primary:hover {
  background: var(--color-primary-light);
  box-shadow: 0 6px 20px rgba(15, 52, 96, 0.4);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-full {
  width: 100%;
  padding: 16px;
}

/* ─── 通用Section ─── */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--color-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-eyebrow {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 2px;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section-eyebrow.light {
  color: var(--color-accent-light);
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.section-title.light {
  color: var(--color-white);
}

.section-subtitle {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 640px;
  margin: 0 auto;
}

/* ═══ 模块1：导航栏 ═══ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: var(--transition);
  border-bottom: 1px solid transparent;
}

#navbar.scrolled {
  box-shadow: var(--shadow-sm);
  border-bottom-color: var(--color-border);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo img {
  height: 42px;
  width: auto;
  transition: var(--transition);
}

.nav-logo:hover img {
  opacity: 0.85;
}

.nav-menu {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav-link {
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 400;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--color-primary);
  background: var(--color-secondary);
}

.nav-link.active {
  color: var(--color-primary);
  font-weight: 500;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}

.nav-cta {
  background: var(--color-primary);
  color: var(--color-white) !important;
  padding: 10px 24px;
  font-weight: 500;
}

.nav-cta:hover {
  background: var(--color-primary-light);
  color: var(--color-white) !important;
}

.nav-cta.active::after {
  display: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ═══ 模块2：Hero ═══ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(160deg, #0a2540 0%, #0F3460 40%, #1a4a7a 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(201, 168, 108, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 168, 108, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 40%, rgba(201, 168, 108, 0.08) 0%, transparent 60%),
    radial-gradient(circle at 20% 80%, rgba(15, 52, 96, 0.6) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(26, 74, 122, 0.5) 0%, transparent 50%);
}

.hero-city {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40%;
  background:
    linear-gradient(to top, rgba(10, 37, 64, 0.9) 0%, transparent 100%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 300' preserveAspectRatio='none'%3E%3Cpath d='M0,300 L0,200 L40,200 L40,160 L80,160 L80,120 L120,120 L120,180 L160,180 L160,100 L200,100 L200,140 L240,140 L240,80 L280,80 L280,160 L320,160 L320,120 L360,120 L360,60 L400,60 L400,140 L440,140 L440,100 L480,100 L480,40 L520,40 L520,120 L560,120 L560,80 L600,80 L600,20 L640,20 L640,100 L680,100 L680,60 L720,60 L720,140 L760,140 L760,100 L800,100 L800,50 L840,50 L840,130 L880,130 L880,90 L920,90 L920,30 L960,30 L960,110 L1000,110 L1000,70 L1040,70 L1040,150 L1080,150 L1080,110 L1120,110 L1120,170 L1160,170 L1160,130 L1200,130 L1200,300 Z' fill='%230a2540' opacity='0.6'/%3E%3C/svg%3E");
  background-size: cover;
  background-position: bottom center;
  background-repeat: no-repeat;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 820px;
  padding: 0 24px;
  animation: fadeUp 1s ease-out;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(201, 168, 108, 0.12);
  border: 1px solid rgba(201, 168, 108, 0.3);
  border-radius: 50px;
  font-size: 14px;
  color: var(--color-accent);
  font-weight: 500;
  letter-spacing: 1px;
  margin-bottom: 28px;
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
  font-size: 56px;
  font-weight: 900;
  color: var(--color-white);
  letter-spacing: 6px;
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
  font-size: 22px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 20px;
  letter-spacing: 4px;
}

.hero-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 20px;
}

.hero-divider-line {
  width: 60px;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-accent), transparent);
}

.hero-divider-diamond {
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  transform: rotate(45deg);
}

.hero-tags {
  font-size: 16px;
  color: var(--color-accent);
  font-weight: 500;
  letter-spacing: 4px;
  margin-bottom: 24px;
}

.hero-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.75);
  max-width: 620px;
  margin: 0 auto 36px;
  line-height: 2;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero-buttons .btn {
  gap: 8px;
}

.hero-buttons .btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-primary-dark);
  box-shadow: 0 6px 24px rgba(201, 168, 108, 0.4);
}

.btn-primary:hover {
  background: var(--color-accent-light);
  box-shadow: 0 8px 30px rgba(201, 168, 108, 0.5);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-white);
  color: var(--color-white);
}

.hero-stats {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: 0;
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 28px 40px;
  max-width: 560px;
  margin: 0 auto;
}

.hero-stat {
  flex: 1;
  text-align: center;
  padding: 0 16px;
}

.hero-stat-divider {
  width: 1px;
  background: rgba(255, 255, 255, 0.15);
}

.hero-stat-num {
  font-size: 32px;
  font-weight: 900;
  color: var(--color-accent);
  line-height: 1.2;
  margin-bottom: 6px;
}

.hero-stat-plus,
.hero-stat-percent {
  font-size: 20px;
  font-weight: 700;
}

.hero-stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 1px;
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.hero-scroll p {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 2px;
}

.hero-scroll span {
  display: block;
  width: 26px;
  height: 42px;
  border: 2px solid rgba(201, 168, 108, 0.5);
  border-radius: 14px;
  position: relative;
}

.hero-scroll span::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 2px;
  animation: scrollHint 2s ease-in-out infinite;
}

@keyframes scrollHint {
  0%, 100% { opacity: 0; transform: translate(-50%, 0); }
  50% { opacity: 1; transform: translate(-50%, 10px); }
}

/* ═══ 模块3：证书卡片 ═══ */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.cert-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}

.cert-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}

.cert-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  color: var(--color-primary);
  transition: var(--transition);
}

.cert-card:hover .cert-icon {
  color: var(--color-accent);
}

.cert-icon svg {
  width: 100%;
  height: 100%;
}

.cert-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.cert-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ═══ 模块4：正版网课 ═══ */
.courses-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.courses-desc {
  font-size: 17px;
  color: var(--color-text-light);
  margin-bottom: 28px;
  line-height: 1.9;
}

.courses-features {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.courses-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  color: var(--color-text);
}

.check-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  font-size: 13px;
  flex-shrink: 0;
}

.courses-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.visual-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--color-border);
}

.visual-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.visual-card-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  color: var(--color-accent);
}

.visual-card-icon svg {
  width: 100%;
  height: 100%;
}

.visual-card h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.visual-card p {
  font-size: 14px;
  color: var(--color-text-light);
}

/* ═══ 模块5：核心优势 ═══ */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.advantage-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 36px 24px;
  position: relative;
  transition: var(--transition);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.advantage-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: var(--transition);
}

.advantage-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

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

.advantage-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.advantage-icon {
  width: 48px;
  height: 48px;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.advantage-icon svg {
  width: 100%;
  height: 100%;
}

.advantage-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.advantage-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ═══ 模块6：报考流程时间线 ═══ */
.timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
}

.timeline-line {
  position: absolute;
  top: 28px;
  left: 8%;
  right: 8%;
  height: 2px;
  background: linear-gradient(to right, var(--color-accent), var(--color-primary), var(--color-accent));
  opacity: 0.3;
}

.timeline-step {
  text-align: center;
  position: relative;
  z-index: 1;
}

.timeline-dot {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  background: var(--color-white);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.timeline-step:hover .timeline-dot {
  background: var(--color-primary);
  color: var(--color-white);
  transform: scale(1.05);
}

.timeline-dot svg {
  width: 24px;
  height: 24px;
}

.timeline-content {
  text-align: center;
}

.timeline-num {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.timeline-content h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.timeline-content p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
  padding: 0 4px;
}

/* ═══ 模块7：学员价值 ═══ */
.value-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.value-text .section-eyebrow {
  margin-bottom: 8px;
}

.value-text .section-title {
  text-align: left;
  margin-bottom: 20px;
}

.value-desc {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 32px;
}

.value-stats {
  display: flex;
  gap: 40px;
}

.value-stat {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 36px;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 14px;
  color: var(--color-text-light);
}

.value-visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.value-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--color-secondary);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  transition: var(--transition);
  border: 1px solid var(--color-border);
}

.value-card:hover {
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  transform: translateX(6px);
}

.value-card-icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.value-card-icon svg {
  width: 100%;
  height: 100%;
}

.value-card h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.value-card p {
  font-size: 14px;
  color: var(--color-text-light);
}

/* ═══ 模块8：在线咨询（企业微信客服） ═══ */
.section-contact {
  background: var(--color-primary);
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
}

.contact-simple {
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}

.contact-simple .section-eyebrow {
  display: inline-block;
  margin-bottom: 12px;
}

.contact-simple .section-title {
  text-align: center;
  margin-bottom: 16px;
}

.contact-simple-desc {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
  margin-bottom: 36px;
}

.btn-contact-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 18px 52px;
  font-size: 18px;
  font-weight: 700;
  font-family: inherit;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 6px 24px rgba(201, 168, 108, 0.4);
  letter-spacing: 2px;
}

.btn-contact-cta svg {
  width: 24px;
  height: 24px;
}

.btn-contact-cta:hover {
  background: var(--color-accent-light);
  box-shadow: 0 8px 30px rgba(201, 168, 108, 0.5);
  transform: translateY(-2px);
}

.contact-simple-tip {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 20px;
}

/* ═══ 右侧悬浮二维码 ═══ */
.float-qrcode {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 900;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.float-qrcode-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-lg);
  text-align: center;
  margin-bottom: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateX(10px);
  transition: var(--transition);
  width: 160px;
  border: 1px solid var(--color-border);
}

.float-qrcode:hover .float-qrcode-card {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.float-qrcode-img {
  width: 128px;
  height: 128px;
  margin: 0 auto 10px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--color-secondary);
}

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

.float-qrcode-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 2px;
}

.float-qrcode-sub {
  font-size: 12px;
  color: var(--color-accent);
  font-weight: 500;
}

.float-qrcode-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 64px;
  height: 64px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(15, 52, 96, 0.3);
  transition: var(--transition);
  border: 2px solid var(--color-accent);
}

.float-qrcode:hover .float-qrcode-btn {
  background: var(--color-accent);
  color: var(--color-primary-dark);
  box-shadow: 0 6px 20px rgba(201, 168, 108, 0.5);
  transform: scale(1.05);
}

.float-qrcode-btn svg {
  width: 24px;
  height: 24px;
}

.float-qrcode-btn span {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1px;
}

/* ═══ 模块9：关于我们 ═══ */
.about-content {
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
}

.about-content p {
  font-size: 17px;
  color: var(--color-text-light);
  line-height: 2;
  margin-bottom: 20px;
}

/* ═══ 页脚 ═══ */
.footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 28px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
  margin-bottom: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
  text-align: left;
}

.footer-logo {
  height: 44px;
  margin-bottom: 16px;
  filter: brightness(1.2);
}

.footer-brand p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-col h5 {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-white);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 10px;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

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

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-legal {
  display: flex;
  gap: 12px;
  align-items: center;
}

.footer-legal a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  transition: var(--transition);
}

.footer-legal a:hover {
  color: var(--color-accent);
}

.footer-legal span {
  color: rgba(255, 255, 255, 0.3);
}

/* ═══ 响应式：平板 ═══ */
@media (max-width: 1024px) {
  .cert-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .timeline {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .timeline-line {
    display: none;
  }

  .courses-layout,
  .value-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .value-text .section-title {
    text-align: center;
  }

  .value-text .section-eyebrow {
    display: block;
    text-align: center;
  }
}

/* ═══ 响应式：平板 ═══ */
@media (max-width: 1024px) {
  .cert-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .timeline {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .timeline-line {
    display: none;
  }

  .courses-layout,
  .value-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .value-text .section-title {
    text-align: center;
  }

  .value-text .section-eyebrow {
    display: block;
    text-align: center;
  }

  .value-desc {
    text-align: center;
  }

  .value-stats {
    justify-content: center;
  }
}

/* ═══ 响应式：手机 ═══ */
@media (max-width: 768px) {
  /* 导航移动端 */
  .nav-container {
    height: 60px;
    padding: 0 16px;
  }

  .nav-logo img {
    height: 36px;
  }

  .nav-menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: 12px 16px 20px;
    gap: 2px;
    box-shadow: 0 4px 12px rgba(15, 52, 96, 0.08);
    transform: translateY(-150%);
    transition: transform 0.3s ease;
    border-bottom: 1px solid var(--color-border);
    z-index: 999;
  }

  .nav-menu.open {
    transform: translateY(0);
  }

  .nav-link {
    width: 100%;
    padding: 14px 16px;
    text-align: center;
    font-size: 15px;
    border-radius: 8px;
  }

  .nav-link.active {
    background: var(--color-secondary);
  }

  .nav-link.active::after {
    display: none;
  }

  .nav-cta {
    margin-top: 8px;
    width: 100%;
    justify-content: center;
  }

  .nav-toggle {
    display: flex;
  }

  /* Hero移动端 */
  .hero {
    min-height: 90vh;
    padding-top: 60px;
  }

  .hero-content {
    padding: 0 20px;
  }

  .hero-badge {
    font-size: 12px;
    padding: 6px 16px;
    margin-bottom: 20px;
    letter-spacing: 0;
  }

  .hero-title {
    font-size: 36px;
    letter-spacing: 3px;
    margin-bottom: 12px;
  }

  .hero-subtitle {
    font-size: 16px;
    letter-spacing: 2px;
    margin-bottom: 16px;
  }

  .hero-divider {
    gap: 12px;
    margin-bottom: 16px;
  }

  .hero-divider-line {
    width: 40px;
  }

  .hero-tags {
    font-size: 13px;
    letter-spacing: 2px;
    margin-bottom: 18px;
  }

  .hero-desc {
    font-size: 14px;
    margin-bottom: 28px;
    line-height: 1.9;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
    max-width: 280px;
    margin: 0 auto 40px;
    gap: 12px;
  }

  .hero-buttons .btn {
    width: 100%;
    padding: 14px 28px;
    font-size: 15px;
  }

  .hero-stats {
    padding: 20px 16px;
    gap: 0;
  }

  .hero-stat {
    padding: 0 10px;
  }

  .hero-stat-num {
    font-size: 22px;
  }

  .hero-stat-plus,
  .hero-stat-percent {
    font-size: 14px;
  }

  .hero-stat-label {
    font-size: 11px;
    letter-spacing: 0;
  }

  .hero-scroll {
    bottom: 20px;
  }

  .hero-scroll p {
    font-size: 11px;
  }

  /* 通用Section移动端 */
  .section {
    padding: 48px 0;
  }

  .section-header {
    margin-bottom: 36px;
  }

  .section-title {
    font-size: 26px;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
  }

  .section-subtitle {
    font-size: 14px;
    padding: 0 8px;
  }

  .section-eyebrow {
    font-size: 12px;
    letter-spacing: 1px;
    margin-bottom: 8px;
  }

  /* 证书卡片移动端 */
  .cert-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .cert-card {
    padding: 24px 16px;
  }

  .cert-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 14px;
  }

  .cert-name {
    font-size: 16px;
    margin-bottom: 6px;
  }

  .cert-desc {
    font-size: 12px;
    line-height: 1.5;
  }

  /* 网课板块移动端 */
  .courses-layout {
    gap: 32px;
  }

  .courses-desc {
    font-size: 15px;
    margin-bottom: 20px;
  }

  .courses-features li {
    font-size: 14px;
  }

  .courses-visual {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .visual-card {
    padding: 24px 16px;
  }

  .visual-card-icon {
    width: 44px;
    height: 44px;
    margin-bottom: 12px;
  }

  .visual-card h4 {
    font-size: 15px;
    margin-bottom: 4px;
  }

  .visual-card p {
    font-size: 12px;
  }

  /* 优势板块移动端 */
  .advantage-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .advantage-card {
    padding: 24px 18px;
  }

  .advantage-num {
    font-size: 12px;
    margin-bottom: 10px;
  }

  .advantage-icon {
    width: 36px;
    height: 36px;
    margin-bottom: 14px;
  }

  .advantage-title {
    font-size: 15px;
    margin-bottom: 8px;
  }

  .advantage-desc {
    font-size: 12px;
    line-height: 1.6;
  }

  /* 流程时间线移动端 - 改为竖排 */
  .timeline {
    grid-template-columns: 1fr;
    gap: 0;
    position: relative;
    padding-left: 40px;
  }

  .timeline::before {
    content: "";
    position: absolute;
    left: 27px;
    top: 20px;
    bottom: 20px;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), var(--color-primary));
    opacity: 0.3;
  }

  .timeline-line {
    display: none;
  }

  .timeline-step {
    display: flex;
    align-items: flex-start;
    text-align: left;
    padding: 20px 0;
    position: relative;
  }

  .timeline-dot {
    width: 44px;
    height: 44px;
    margin: 0 20px 0 0;
    flex-shrink: 0;
    position: absolute;
    left: -40px;
    top: 16px;
  }

  .timeline-dot svg {
    width: 20px;
    height: 20px;
  }

  .timeline-content {
    text-align: left;
    padding-left: 12px;
  }

  .timeline-num {
    margin-bottom: 4px;
  }

  .timeline-content h4 {
    font-size: 15px;
    margin-bottom: 6px;
  }

  .timeline-content p {
    font-size: 13px;
    padding: 0;
  }

  /* 学员价值移动端 */
  .value-layout {
    gap: 32px;
  }

  .value-text .section-title {
    text-align: center;
    font-size: 24px;
  }

  .value-text .section-eyebrow {
    display: block;
    text-align: center;
  }

  .value-desc {
    font-size: 14px;
    text-align: center;
    margin-bottom: 24px;
  }

  .value-stats {
    flex-wrap: wrap;
    gap: 24px;
    justify-content: center;
  }

  .stat-num {
    font-size: 28px;
  }

  .stat-label {
    font-size: 13px;
  }

  .value-visual {
    gap: 12px;
  }

  .value-card {
    padding: 20px;
    gap: 16px;
  }

  .value-card-icon {
    width: 40px;
    height: 40px;
  }

  .value-card h4 {
    font-size: 16px;
  }

  .value-card p {
    font-size: 13px;
  }

  /* 关于我们移动端 */
  .about-content p {
    font-size: 15px;
    line-height: 1.9;
  }

  /* 咨询板块移动端 */
  .contact-simple-desc {
    font-size: 15px;
    margin-bottom: 28px;
  }

  .btn-contact-cta {
    padding: 16px 40px;
    font-size: 16px;
    width: 100%;
    max-width: 280px;
  }

  .contact-simple-tip {
    font-size: 13px;
  }

  /* 悬浮二维码移动端 */
  .float-qrcode {
    right: 10px;
    top: auto;
    bottom: 80px;
    transform: none;
  }

  .float-qrcode-btn {
    width: 52px;
    height: 52px;
  }

  .float-qrcode-btn svg {
    width: 20px;
    height: 20px;
  }

  .float-qrcode-btn span {
    font-size: 10px;
    letter-spacing: 0;
  }

  .float-qrcode-card {
    position: absolute;
    bottom: 60px;
    right: 0;
    width: 140px;
    padding: 12px;
    margin-bottom: 0;
  }

  .float-qrcode-img {
    width: 100px;
    height: 100px;
  }

  /* 页脚移动端 */
  .footer {
    padding: 40px 0 20px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
    text-align: center;
    margin-bottom: 28px;
    padding-bottom: 28px;
  }

  .footer-brand {
    text-align: center;
  }

  .footer-logo {
    margin: 0 auto 12px;
    height: 38px;
  }

  .footer-brand p {
    font-size: 13px;
  }

  .footer-links {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    text-align: center;
  }

  .footer-col h5 {
    font-size: 14px;
    margin-bottom: 12px;
  }

  .footer-col a {
    margin-bottom: 8px;
    font-size: 13px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 10px;
  }

  .footer-bottom p {
    font-size: 12px;
  }

  .footer-legal {
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .footer-legal a {
    font-size: 12px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .nav-container {
    padding: 0 14px;
  }

  .hero-badge {
    font-size: 11px;
    padding: 5px 14px;
  }

  .hero-title {
    font-size: 28px;
    letter-spacing: 2px;
  }

  .hero-subtitle {
    font-size: 14px;
    letter-spacing: 1px;
  }

  .hero-tags {
    font-size: 12px;
    letter-spacing: 1px;
  }

  .hero-desc {
    font-size: 13px;
  }

  .hero-stats {
    padding: 16px 12px;
  }

  .hero-stat-num {
    font-size: 18px;
  }

  .hero-stat-label {
    font-size: 10px;
  }

  .section-title {
    font-size: 22px;
  }

  .cert-card {
    padding: 24px 20px;
  }

  .cert-name {
    font-size: 17px;
  }

  .courses-visual {
    grid-template-columns: 1fr;
  }

  .footer-links {
    grid-template-columns: 1fr 1fr;
  }
}