/* ========== 全局变量：定义色彩、阴影与断点 ========== */
:root {
  --color-primary: #1c4cff;
  --color-secondary: #fecd45;
  --color-dark: #111a3a;
  --color-muted: #6c728a;
  --color-light: #f4f6fb;
  --radius-lg: 24px;
  --radius-md: 16px;
  --shadow-soft: 0 20px 60px rgba(28, 76, 255, 0.15);
  --shadow-card: 0 18px 40px rgba(17, 26, 58, 0.12);
  --max-width: 1280px;
  --section-spacing: 6rem;
  --section-spacing-mobile: 4rem;
}

/* ========== 基本排版：重置默认样式并设置字体 ========== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  color: var(--color-dark);
  background: linear-gradient(180deg, #e9edff 0%, #ffffff 45%, #f8fbff 100%);
  min-height: 100vh;
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  z-index: -2;
  opacity: 0.55;
  filter: blur(120px);
  pointer-events: none;
  background: radial-gradient(circle, rgba(28, 76, 255, 0.5), transparent 65%);
}

body::before {
  top: -120px;
  right: -60px;
}

body::after {
  bottom: -160px;
  left: -80px;
  background: radial-gradient(circle, rgba(254, 205, 69, 0.5), transparent 70%);
}

main {
  position: relative;
  z-index: 1;
}

html {
  scroll-behavior: smooth;
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-md);
}

a {
  color: inherit;
  text-decoration: none;
}

p {
  color: var(--color-muted);
  margin: 0;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.3;
  font-weight: 700;
}

/* ========== 布局容器：控制页面最大宽度与水平内边距 ========== */
.container {
  width: min(100% - 3rem, var(--max-width));
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (max-width: 768px) {
  .container {
    width: min(100% - 2rem, var(--max-width));
    padding: 0 1rem;
  }
}

/* ========== 公共元素：徽标/按钮/标记 ========== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.9rem;
  background: rgba(28, 76, 255, 0.1);
  color: var(--color-primary);
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.8rem;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  border: none;
  cursor: pointer;
}

.btn--primary {
  background: linear-gradient(120deg, #1c4cff, #5b7bff);
  color: #fff;
  box-shadow: var(--shadow-soft);
}

.btn--ghost {
  border: 1px solid rgba(28, 76, 255, 0.3);
  color: var(--color-primary);
  background: transparent;
}

.btn:hover {
  transform: translateY(-2px);
}

/* ========== 顶部导航：包含 LOGO、导航链接与 CTA ========== */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(108, 114, 138, 0.1);
  z-index: 100;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.1rem 0;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  color: var(--color-muted);
  padding: 0.35rem;
  border-radius: 999px;
  border: 1px solid rgba(28, 76, 255, 0.08);
  background: rgba(244, 246, 251, 0.9);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.site-nav a {
  position: relative;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  font-size: 0.95rem;
  color: inherit;
  overflow: hidden;
  z-index: 0;
  transition: color 0.2s ease;
}

.site-nav a::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: rgba(28, 76, 255, 0.08);
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: -1;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--color-primary);
}

.site-nav a:hover::before,
.site-nav a:focus-visible::before {
  opacity: 1;
  transform: scale(1);
}

.site-nav:focus-within {
  border-color: rgba(28, 76, 255, 0.3);
  box-shadow: 0 0 0 3px rgba(28, 76, 255, 0.08);
}

.nav-toggle,
.nav-toggle__label {
  display: none;
}

/* ========== 英雄区：全新重构布局 ========== */
.hero {
  position: relative;
  padding: 1rem 0 6.5rem;
  min-height: auto;
  display: flex;
  align-items: flex-start;
  overflow: hidden;
  border-bottom-left-radius: 60px;
  border-bottom-right-radius: 60px;
  background: linear-gradient(180deg, #f8fbff 0%, #ffffff 50%, #f0f4ff 100%);
}

/* 背景装饰系统 */
.hero__bg-decoration {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero__bg-gradient {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top right, rgba(28, 76, 255, 0.15) 0%, transparent 50%),
              radial-gradient(ellipse at bottom left, rgba(254, 205, 69, 0.12) 0%, transparent 50%);
  opacity: 0.6;
}

.hero__bg-pattern {
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(circle at 20% 30%, rgba(28, 76, 255, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(254, 205, 69, 0.06) 0%, transparent 50%);
  opacity: 0.4;
}

.hero__floating-shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.3;
  animation: float-shape 25s ease-in-out infinite;
}

.hero__floating-shape--1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(28, 76, 255, 0.4), transparent 70%);
  top: 10%;
  right: 10%;
  animation-delay: 0s;
}

.hero__floating-shape--2 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(254, 205, 69, 0.35), transparent 70%);
  bottom: 15%;
  left: 5%;
  animation-delay: 8s;
}

.hero__floating-shape--3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(28, 76, 255, 0.25), transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: 15s;
}

@keyframes float-shape {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(40px, -40px) scale(1.15);
  }
  66% {
    transform: translate(-30px, 30px) scale(0.85);
  }
}

.hero__container {
  position: relative;
  z-index: 1;
  width: 100%;
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding-top: 1rem;
}

/* 信任信息展示（整合到内容区） */
.hero__trust-info {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.875rem;
  margin: 1rem 0 0.5rem;
  flex-shrink: 0;
}

.hero__trust-info-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 0.875rem;
  background: rgba(255, 255, 255, 0.85);
  border-radius: 14px;
  border: 1px solid rgba(28, 76, 255, 0.08);
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  min-width: 0;
  min-height: 80px;
}

.hero__footer-section .hero__trust-info-item {
  min-height: 100px;
  padding: 1.25rem 1rem;
  flex-direction: column;
  text-align: center;
  justify-content: center;
}

.hero__trust-info-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(28, 76, 255, 0.12);
  border-color: rgba(28, 76, 255, 0.2);
}

.hero__trust-info-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(28, 76, 255, 0.1), rgba(28, 76, 255, 0.05));
  display: grid;
  place-items: center;
  flex-shrink: 0;
  color: var(--color-primary);
}

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

.hero__trust-info-text {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
  flex: 1;
}

.hero__trust-info-text strong {
  font-size: 0.9rem;
  color: var(--color-dark);
  font-weight: 700;
  line-height: 1.3;
}

.hero__trust-info-text span {
  font-size: 0.75rem;
  color: var(--color-muted);
  line-height: 1.4;
}

/* PC端容器优化 */
.hero__container--pc {
  max-width: 1400px;
  padding: 0 2rem;
}

@media (min-width: 1600px) {
  .hero__container--pc {
    max-width: 1600px;
  }
}

/* 核心内容区布局 - 宽屏单列 */
.hero__core {
  display: flex;
  flex-direction: column;
  margin-bottom: 0;
}

.hero__core--wide {
  width: 100%;
}

/* 宽屏内容区 - PC端优化 */
.hero__content-wrapper--wide {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  background: rgba(255, 255, 255, 0.98);
  border-radius: 36px;
  padding: 4rem 3.5rem;
  box-shadow: 0 24px 80px rgba(17, 26, 58, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  position: relative;
  overflow: visible;
  width: 100%;
  max-width: 100%;
}

@media (min-width: 1400px) {
  .hero__content-wrapper--wide {
    padding: 4.5rem 4rem;
    gap: 3rem;
  }
}

@media (min-width: 1600px) {
  .hero__content-wrapper--wide {
    padding: 5rem 4.5rem;
    gap: 3.5rem;
  }
}

.hero__content-wrapper--wide::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 32px 32px 0 0;
}

/* 首屏 PC 布局 */
.hero__pc-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr);
  gap: 2.5rem;
  align-items: stretch;
}

@media (max-width: 1200px) {
  .hero__pc-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hero__pc-layout {
    gap: 2rem;
  }
}

.hero__pc-left {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.hero__eyebrow {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hero__trust-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero__trust-badge {
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: rgba(28, 76, 255, 0.08);
  color: var(--color-primary);
  border: 1px solid rgba(28, 76, 255, 0.2);
}

.hero__trust-badge:nth-child(2) {
  background: rgba(254, 205, 69, 0.15);
  color: #b46900;
  border-color: rgba(254, 205, 69, 0.3);
}

.hero__trust-badge:nth-child(3) {
  background: rgba(17, 26, 58, 0.08);
  color: var(--color-dark);
  border-color: rgba(17, 26, 58, 0.12);
}

.hero__value-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
}

.hero__value-item {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1.1rem 1rem;
  border-radius: 18px;
  background: rgba(244, 246, 251, 0.8);
  border: 1px solid rgba(28, 76, 255, 0.1);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.hero__value-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(17, 26, 58, 0.12);
  background: #fff;
}

.hero__value-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(28, 76, 255, 0.1), rgba(28, 76, 255, 0.05));
  display: grid;
  place-items: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.hero__value-icon svg {
  width: 24px;
  height: 24px;
}

.hero__value-item strong {
  display: block;
  font-size: 1rem;
  color: var(--color-dark);
  margin-bottom: 0.2rem;
}

.hero__value-item span {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.hero__contact-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.2rem 1.5rem;
  border-radius: 18px;
  background: rgba(28, 76, 255, 0.06);
  border: 1px solid rgba(28, 76, 255, 0.15);
}

.hero__contact-chip strong {
  display: block;
  font-size: 1.1rem;
  color: var(--color-dark);
}

.hero__contact-chip span {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.hero__pc-right {
  display: flex;
  align-items: stretch;
}

.hero__stats-panel {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 30px;
  padding: 2.5rem;
  border: 1px solid rgba(28, 76, 255, 0.12);
  box-shadow: 0 24px 60px rgba(17, 26, 58, 0.12);
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  width: 100%;
}

.hero__stats-panel-header {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.hero__stats-panel-header span {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  text-transform: uppercase;
}

.hero__stats-panel-header p {
  margin: 0;
  color: var(--color-muted);
}

.hero__stats-grid--panel {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.hero__stat-card small {
  font-size: 0.75rem;
  color: var(--color-muted);
}

.hero__insight-card {
  border-radius: 20px;
  padding: 1.75rem;
  background: linear-gradient(135deg, rgba(28, 76, 255, 0.08), rgba(254, 205, 69, 0.08));
  border: 1px solid rgba(28, 76, 255, 0.12);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hero__insight-card strong {
  font-size: 1.2rem;
}

.hero__insight-card p {
  margin: 0;
  color: var(--color-muted);
}

.hero__insight-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.75rem;
}

.hero__insight-list li {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px dashed rgba(28, 76, 255, 0.3);
}

.hero__insight-list span {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.hero__insight-list strong {
  font-size: 1rem;
  color: var(--color-dark);
}

.hero__data-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  padding: 1.5rem;
  border-radius: 22px;
  background: rgba(17, 26, 58, 0.85);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero__data-item {
  padding: 1rem 1.25rem;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-height: 120px;
}

.hero__data-label {
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
}

.hero__data-value {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
}

.hero__data-desc {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.8);
}

@media (max-width: 1024px) {
  .hero__data-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .hero__data-strip {
    grid-template-columns: 1fr;
  }
  
  .hero__contact-chip {
    flex-direction: column;
    align-items: flex-start;
  }
}

.hero__badge-group {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}

.hero__badge {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.hero__badge--primary {
  background: linear-gradient(135deg, rgba(28, 76, 255, 0.12), rgba(28, 76, 255, 0.06));
  color: var(--color-primary);
  border: 1px solid rgba(28, 76, 255, 0.2);
}

.hero__badge--secondary {
  background: linear-gradient(135deg, rgba(254, 205, 69, 0.15), rgba(254, 205, 69, 0.08));
  color: #b46900;
  border: 1px solid rgba(254, 205, 69, 0.25);
}

.hero__headline {
  font-size: clamp(2.2rem, 5.5vw, 3.6rem);
  line-height: 1.25;
  margin: 0;
  color: var(--color-dark);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero__headline-main {
  display: block;
  margin-bottom: 0.75rem;
}

.hero__headline-accent {
  display: block;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__description {
  font-size: clamp(1.1rem, 2.3vw, 1.35rem);
  line-height: 1.75;
  margin: 0;
  color: var(--color-muted);
}

.hero__description strong {
  color: var(--color-primary);
  font-weight: 700;
}

/* 核心优势展示 */
.hero__features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.875rem;
  margin: 0.75rem 0 0;
  flex-shrink: 0;
}

.hero__features-section .hero__features {
  grid-template-columns: 1fr;
  gap: 1rem;
}

.hero__feature-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.375rem 0.875rem;
  background: rgba(255, 255, 255, 0.85);
  border-radius: 14px;
  border: 1px solid rgba(28, 76, 255, 0.08);
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  min-width: 0;
  min-height: 140px;
  justify-content: center;
}

.hero__features-section .hero__feature-item {
  flex-direction: row;
  text-align: left;
  align-items: center;
  justify-content: flex-start;
  min-height: 100px;
  padding: 1.5rem;
}

.hero__feature-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(28, 76, 255, 0.12);
  border-color: rgba(28, 76, 255, 0.2);
}

.hero__feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(28, 76, 255, 0.1), rgba(28, 76, 255, 0.05));
  display: grid;
  place-items: center;
  margin-bottom: 0.75rem;
  color: var(--color-primary);
}

.hero__feature-icon svg {
  width: 24px;
  height: 24px;
}

.hero__feature-content {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.hero__feature-content strong {
  font-size: 0.95rem;
  color: var(--color-dark);
  font-weight: 700;
}

.hero__feature-content span {
  font-size: 0.8rem;
  color: var(--color-muted);
}

/* 行动按钮组 */
.hero__cta-group {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
  align-items: center;
}

.btn--hero {
  padding: 1.1rem 2.4rem;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  transition: all 0.3s ease;
}

.btn--primary.btn--hero {
  background: linear-gradient(135deg, var(--color-primary), #5b7bff);
  color: white;
  box-shadow: 0 8px 24px rgba(28, 76, 255, 0.3);
}

.btn--primary.btn--hero:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(28, 76, 255, 0.4);
}

.btn--primary.btn--hero svg {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
}

.btn--primary.btn--hero:hover svg {
  transform: translateX(4px);
}

.btn--outline.btn--hero {
  border: 2px solid rgba(28, 76, 255, 0.3);
  color: var(--color-primary);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
}

.btn--outline.btn--hero:hover {
  background: rgba(28, 76, 255, 0.05);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

/* 信任信息区域优化 */
.hero__footer-section .hero__trust-info {
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 0;
}

.hero__footer-section .hero__trust-info-item {
  min-height: 100px;
  padding: 1.25rem 1rem;
  flex-direction: column;
  text-align: center;
  justify-content: center;
}

.hero__footer-section .hero__trust-info-icon {
  margin-bottom: 0.75rem;
}

.hero__stats-panel::-webkit-scrollbar {
  width: 6px;
}

.hero__stats-panel::-webkit-scrollbar-track {
  background: rgba(28, 76, 255, 0.05);
  border-radius: 3px;
}

.hero__stats-panel::-webkit-scrollbar-thumb {
  background: rgba(28, 76, 255, 0.2);
  border-radius: 3px;
}

.hero__stats-panel::-webkit-scrollbar-thumb:hover {
  background: rgba(28, 76, 255, 0.3);
}

.hero__stats-header {
  margin-bottom: 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid rgba(28, 76, 255, 0.1);
  flex-shrink: 0;
}

.hero__stats-badge {
  display: inline-block;
  padding: 0.4rem 0.9rem;
  background: linear-gradient(135deg, rgba(28, 76, 255, 0.1), rgba(254, 205, 69, 0.08));
  color: var(--color-primary);
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.hero__stats-title {
  font-size: 1.4rem;
  color: var(--color-dark);
  margin: 0;
  font-weight: 700;
  line-height: 1.3;
}

.hero__stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.125rem;
  margin-bottom: 1.5rem;
  flex-shrink: 0;
}

.hero__stat-card {
  background: rgba(255, 255, 255, 0.85);
  border-radius: 14px;
  padding: 1.5rem 1.25rem;
  border: 1px solid rgba(28, 76, 255, 0.08);
  transition: all 0.3s ease;
  text-align: center;
  min-height: 140px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero__stats-section .hero__stat-card {
  min-height: 120px;
  padding: 1.25rem;
}

.hero__stat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(17, 26, 58, 0.12);
}

.hero__stat-card--primary {
  background: linear-gradient(135deg, rgba(28, 76, 255, 0.08), rgba(255, 255, 255, 0.9));
  border-color: rgba(28, 76, 255, 0.15);
}

.hero__stat-card--success {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.08), rgba(255, 255, 255, 0.9));
  border-color: rgba(34, 197, 94, 0.15);
}

.hero__stat-card--warning {
  background: linear-gradient(135deg, rgba(254, 205, 69, 0.12), rgba(255, 255, 255, 0.9));
  border-color: rgba(254, 205, 69, 0.2);
}

.hero__stat-card--info {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(255, 255, 255, 0.9));
  border-color: rgba(59, 130, 246, 0.15);
}

.hero__stat-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(28, 76, 255, 0.1);
  display: grid;
  place-items: center;
  margin: 0 auto 0.75rem;
  color: var(--color-primary);
}

.hero__stat-card--success .hero__stat-icon {
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
}

.hero__stat-card--warning .hero__stat-icon {
  background: rgba(254, 205, 69, 0.15);
  color: #b46900;
}

.hero__stat-card--info .hero__stat-icon {
  background: rgba(59, 130, 246, 0.1);
  color: #3b82f6;
}

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

.hero__stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-dark);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.hero__stat-card--primary .hero__stat-value {
  color: var(--color-primary);
}

.hero__stat-card--success .hero__stat-value {
  color: #22c55e;
}

.hero__stat-card--warning .hero__stat-value {
  color: #b46900;
}

.hero__stat-card--info .hero__stat-value {
  color: #3b82f6;
}

.hero__stat-label {
  font-size: 0.85rem;
  color: var(--color-muted);
  font-weight: 500;
}

/* 快速服务卡片 */
.hero__service-card {
  background: linear-gradient(135deg, rgba(28, 76, 255, 0.06), rgba(254, 205, 69, 0.04));
  border-radius: 14px;
  padding: 1.375rem;
  border: 1px solid rgba(28, 76, 255, 0.1);
  transition: all 0.3s ease;
  flex-shrink: 0;
  min-width: 0;
}

.hero__service-card:hover {
  background: linear-gradient(135deg, rgba(28, 76, 255, 0.08), rgba(254, 205, 69, 0.06));
  border-color: rgba(28, 76, 255, 0.15);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(17, 26, 58, 0.1);
}

.hero__service-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.hero__service-header svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.hero__service-header strong {
  font-size: 1.1rem;
  color: var(--color-dark);
  font-weight: 700;
}

.hero__service-card p {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin: 0;
  line-height: 1.6;
}

/* ========== 通用区块：标题、背景与间距 ========== */
.section {
  padding: var(--section-spacing) 0;
  position: relative;
  z-index: 1;
}

.section::after {
  content: "";
  position: absolute;
  inset: 20px 8%;
  border-radius: 34px;
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 30px 70px rgba(17, 26, 58, 0.07);
  z-index: -1;
}

.section--alt {
  background: var(--color-light);
  border-radius: 42px;
  margin: 3rem 0;
  padding: var(--section-spacing) 0;
}

.section--alt::after {
  display: none;
}

.section__header {
  text-align: center;
  margin-bottom: 3.5rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section__header h2 {
  font-size: clamp(1.9rem, 4.5vw, 2.75rem);
  margin: 1rem 0 1.2rem;
  line-height: 1.25;
}

/* ========== 卡片组件：用于优势、教师展示 ========== */
.cards {
  display: grid;
  gap: 2rem;
}

.cards--three {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  isolation: isolate;
  border: 1px solid rgba(28, 76, 255, 0.05);
}

.card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(28, 76, 255, 0.08), transparent 60%);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 25px 60px rgba(17, 26, 58, 0.18);
}

.card:hover::after {
  opacity: 1;
}

.card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.35rem;
  color: var(--color-dark);
  font-weight: 700;
  line-height: 1.3;
}

.card p {
  line-height: 1.7;
  font-size: 1rem;
}

.section--teachers {
  position: relative;
}

.teachers__intro {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.9fr);
  gap: 2.5rem;
  padding: clamp(2rem, 4vw, 3.25rem);
  border-radius: 32px;
  background: linear-gradient(120deg, #1c4cff, #5d8bff);
  color: #fff;
  box-shadow: var(--shadow-soft);
  margin-bottom: 3.5rem;
  position: relative;
  overflow: hidden;
}

.teachers__intro::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.35), transparent 65%);
  filter: blur(0px);
  opacity: 0.8;
  pointer-events: none;
}

.teachers__copy h2 {
  color: #fff;
}

.teachers__copy p {
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.75;
}

.teachers__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.stat-card {
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-height: 120px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.stat-card strong {
  font-size: 1.6rem;
  color: #fff;
}

.stat-card span {
  color: rgba(255, 255, 255, 0.85);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.teachers__highlight {
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
}

.teachers__highlight h3 {
  color: #fff;
  margin-bottom: 1rem;
}

.teachers__highlight ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  color: rgba(255, 255, 255, 0.9);
}

.teachers__highlight li {
  position: relative;
  padding-left: 1.5rem;
}

.teachers__highlight li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-secondary);
  box-shadow: 0 0 12px rgba(254, 205, 69, 0.8);
}

.highlight-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.1rem;
  border-radius: 999px;
  background: rgba(16, 28, 68, 0.35);
  border: 1px dashed rgba(255, 255, 255, 0.4);
  color: #fff;
  font-size: 0.95rem;
}

.highlight-note span {
  font-weight: 700;
  letter-spacing: 0.05em;
}

.highlight-note p {
  color: #fff;
}

.teachers__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.teacher-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(28, 76, 255, 0.05);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  min-height: 100%;
}

.teacher-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 28px 60px rgba(17, 26, 58, 0.18);
}

.teacher-card__avatar {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: linear-gradient(145deg, rgba(28, 76, 255, 0.08), rgba(93, 139, 255, 0.15));
  display: flex;
  align-items: center;
  justify-content: center;
}

.teacher-card__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.teacher-card__avatar--fallback {
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1.3rem;
  background: radial-gradient(circle at top, rgba(254, 205, 69, 0.5), rgba(28, 76, 255, 0.15));
}

.teacher-card__body {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.teacher-card__top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.95rem;
  color: var(--color-muted);
}

.teacher-card__tag {
  background: rgba(28, 76, 255, 0.08);
  color: var(--color-primary);
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
}

.teacher-card__exp {
  font-weight: 600;
  color: var(--color-dark);
}

.teacher-card__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.teacher-card__badge {
  background: rgba(28, 76, 255, 0.08);
  color: var(--color-primary);
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
}

.teacher-card__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  color: var(--color-muted);
}

.teacher-card__list li {
  position: relative;
  padding-left: 1.3rem;
  line-height: 1.6;
}

.teacher-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(254, 205, 69, 0.25);
}

/* ========== 资源矩阵：卡片 + 数字徽章 ========== */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.resource-card {
  display: flex;
  gap: 1.5rem;
  background: #fff;
  padding: 2.5rem;
  border-radius: calc(var(--radius-lg) - 4px);
  box-shadow: var(--shadow-card);
  align-items: flex-start;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid rgba(28, 76, 255, 0.05);
}

.resource-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(92, 123, 255, 0.12), transparent 55%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.resource-card > div {
  position: relative;
  z-index: 1;
}

.resource-card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.35rem;
  color: var(--color-dark);
  font-weight: 700;
  line-height: 1.3;
}

.resource-card p {
  line-height: 1.7;
  font-size: 1rem;
  margin: 0;
}

.resource-card__icon {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  background: linear-gradient(135deg, #1c4cff, #5d8bff);
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  box-shadow: 0 12px 30px rgba(28, 76, 255, 0.3);
  position: relative;
  z-index: 1;
}

.resource-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 28px 60px rgba(17, 26, 58, 0.22);
}

.resource-card:hover::after {
  opacity: 1;
}

/* ========== 教学模式网格：两列对比卡片 ========== */
.grid {
  display: grid;
  gap: 2rem;
}

.grid--two {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.mode-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid rgba(28, 76, 255, 0.05);
}

.mode-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 25px 60px rgba(17, 26, 58, 0.18);
}

.mode-card h3 {
  margin-bottom: 1.25rem;
  font-size: 1.5rem;
  color: var(--color-dark);
  font-weight: 700;
  line-height: 1.3;
}

.mode-card ul {
  padding-left: 1.5rem;
  margin: 1.25rem 0 0;
  color: var(--color-muted);
  line-height: 1.8;
}

.mode-card li {
  margin-bottom: 0.75rem;
  font-size: 1rem;
}

.mode-card li:last-child {
  margin-bottom: 0;
}

/* ========== 口碑见证：卡片 + 徽章 ========== */
.section--voice {
  background: transparent;
}

.testimonials {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.testimonial-card {
  background: linear-gradient(145deg, rgba(28, 76, 255, 0.08), rgba(255, 255, 255, 0.95));
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: 0 30px 70px rgba(17, 26, 58, 0.15);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(28, 76, 255, 0.08);
}

.testimonial-card::after {
  content: "";
  position: absolute;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  top: -30px;
  right: -30px;
  background: rgba(254, 205, 69, 0.35);
  filter: blur(10px);
}

.testimonial-card__badge {
  display: inline-flex;
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--color-dark);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.testimonial-card__quote {
  font-size: 1.2rem;
  color: var(--color-dark);
  line-height: 1.7;
  margin: 0 0 1.5rem;
  position: relative;
}

.testimonial-card__quote::before {
  content: "“";
  font-size: 4rem;
  color: rgba(28, 76, 255, 0.2);
  position: absolute;
  left: -18px;
  top: -20px;
  font-family: Georgia, serif;
}

.testimonial-card__meta {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  color: var(--color-muted);
}

.testimonial-card__meta strong {
  font-size: 1.05rem;
  color: var(--color-primary);
}

/* ========== 联系区：软质渐变 + 信息 / 行动卡双列 ========== */
.section.contact {
  background: linear-gradient(180deg, rgba(248, 250, 255, 0.9), #ffffff);
}

.contact__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 3.5rem;
  align-items: stretch;
}

.contact__content {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.contact__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.contact__chip {
  padding: 0.45rem 1.25rem;
  border-radius: 999px;
  background: rgba(28, 76, 255, 0.08);
  color: var(--color-primary);
  font-size: 0.9rem;
  font-weight: 600;
}

.contact__info {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.contact__info li {
  display: flex;
  gap: 1rem;
  padding: 1.35rem 1.6rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(28, 76, 255, 0.08);
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 15px 40px rgba(17, 26, 58, 0.08);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.contact__info li:hover {
  transform: translateY(-3px);
  border-color: rgba(28, 76, 255, 0.2);
}

.contact__info-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(28, 76, 255, 0.1);
  display: grid;
  place-items: center;
  color: var(--color-primary);
}

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

.contact__info span {
  font-weight: 600;
  color: var(--color-dark);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.contact__info a {
  font-size: 1.15rem;
  color: var(--color-primary);
  font-weight: 600;
  transition: color 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.contact__info a:hover {
  color: #5b7bff;
}

.contact__info p {
  margin: 0.2rem 0 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-muted);
}

.contact__panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-card {
  border-radius: var(--radius-lg);
  padding: 2.4rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: relative;
  overflow: hidden;
}

.contact-card--primary {
  background: linear-gradient(135deg, #1c4cff, #5b7bff);
  color: #fff;
}

.contact-card--primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.35), transparent 55%);
  pointer-events: none;
}

.contact-card--secondary {
  background: #ffffff;
  border: 1px solid rgba(28, 76, 255, 0.08);
}

.contact-card__eyebrow {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(28, 76, 255, 0.8);
}

.contact-card--primary .contact-card__eyebrow {
  color: rgba(255, 255, 255, 0.7);
}

.contact-card h3 {
  margin: 0;
  font-size: 1.75rem;
}

.contact-card p {
  margin: 0;
  line-height: 1.7;
}

.contact-card--primary p {
  color: rgba(255, 255, 255, 0.9);
}

.contact-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.contact-card__actions .btn {
  min-width: 220px;
}

.contact-card__meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.contact-card--primary .contact-card__meta {
  color: rgba(255, 255, 255, 0.85);
}

.contact-card__highlights {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
}

.contact-card__highlights li {
  padding: 1rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.15);
  text-align: center;
}

.contact-card--secondary .contact-card__highlights li {
  background: rgba(28, 76, 255, 0.05);
}

.contact-card__highlights strong {
  display: block;
  font-size: 1.15rem;
}

.contact-card__highlights span {
  display: block;
  font-size: 0.85rem;
  margin-top: 0.35rem;
  color: rgba(255, 255, 255, 0.85);
}

.contact-card--secondary .contact-card__highlights span {
  color: var(--color-muted);
}

.contact-card__tips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.contact-card__tips span {
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(28, 76, 255, 0.08);
}

.contact-card--primary .contact-card__tips span {
  background: rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.85);
}

/* ========== 页脚：简洁对齐 + 辅助链接 ========== */
.site-footer {
  background: #0b1126;
  color: rgba(255, 255, 255, 0.8);
  padding: 2.5rem 0;
  margin-top: 4rem;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.95rem;
}

.site-footer a {
  color: var(--color-secondary);
}

/* ========== 响应式策略：平板与手机适配 ========== */
@media (max-width: 1024px) {
  /* 导航在平板上缩小间距，卡片字体略微减小 */
  .site-nav {
    gap: 0.6rem;
    font-size: 0.95rem;
  }

  /* 首屏布局调整 */
  .hero {
    padding: 5rem 0 5rem;
    min-height: auto;
  }

  .hero__trust-info {
    grid-template-columns: 1fr;
    gap: 0.875rem;
  }

  .hero__content-wrapper--wide {
    padding: 3rem 2.5rem;
    gap: 2rem;
    border-radius: 28px;
  }

  .hero__main-section {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

  .section {
    padding: var(--section-spacing-mobile) 0;
  }

  .section__header {
    margin-bottom: 3rem;
  }
}

@media (max-width: 768px) {
  /* 汉堡按钮在移动端显示并折叠导航 */
  .nav-toggle,
  .nav-toggle__label {
    display: block;
  }

  .nav-toggle {
    position: absolute;
    opacity: 0;
  }

  .nav-toggle__label {
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    border: 1px solid rgba(28, 76, 255, 0.2);
  }

  .nav-toggle__label span,
  .nav-toggle__label span::before,
  .nav-toggle__label span::after {
    width: 20px;
    height: 2px;
    background: var(--color-primary);
    display: block;
    position: relative;
    transition: transform 0.2s ease;
  }

  .nav-toggle__label span::before,
  .nav-toggle__label span::after {
    content: "";
    position: absolute;
    left: 0;
  }

  .nav-toggle__label span::before {
    top: -6px;
  }
  .nav-toggle__label span::after {
    top: 6px;
  }

  .nav-toggle:checked + .nav-toggle__label span {
    transform: rotate(45deg);
  }
  .nav-toggle:checked + .nav-toggle__label span::before {
    transform: rotate(90deg);
    top: 0;
  }
  .nav-toggle:checked + .nav-toggle__label span::after {
    opacity: 0;
  }

  /* 首屏移动端优化 */
  .hero {
    padding: 4rem 0 3rem;
    border-bottom-left-radius: 32px;
    border-bottom-right-radius: 32px;
  }

  .hero__content-wrapper--wide {
    padding: 2.5rem 1.75rem;
    gap: 2rem;
    border-radius: 24px;
  }

  .hero__header-section {
    text-align: left;
  }

  .hero__header-section .hero__badge-group {
    justify-content: flex-start;
  }

  .hero__main-section {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero__section-title {
    font-size: 1.1rem;
  }

  .hero__features-section .hero__features {
    grid-template-columns: 1fr;
  }

  .hero__features-section .hero__feature-item {
    min-height: auto;
    padding: 1.25rem 1rem;
  }

  .hero__stats-section .hero__stats-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .hero__stats-section .hero__stat-card {
    min-height: auto;
    padding: 1.25rem 1rem;
  }

  .hero__action-section .hero__trust-info {
    grid-template-columns: 1fr;
    gap: 0.875rem;
  }

  .hero__action-section .hero__trust-info-item {
    min-height: auto;
    padding: 1rem 0.875rem;
  }

  .hero__action-section .hero__cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero__action-section .btn--hero {
    width: 100%;
  }

  .section {
    padding: var(--section-spacing-mobile) 0;
  }

  .section__header {
    margin-bottom: 2.5rem;
  }

  .cards,
  .resource-grid,
  .grid,
  .testimonials {
    gap: 1.5rem;
  }

  .teachers__intro {
    grid-template-columns: 1fr;
    padding: 2.25rem 1.75rem;
    text-align: left;
  }

  .teachers__stats {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  }

  .teachers__highlight {
    padding: 1.5rem;
  }

  .highlight-note {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .teachers__grid {
    gap: 1.5rem;
  }

  .teacher-card {
    padding: 2rem 1.75rem;
  }

  .teacher-card__top {
    flex-direction: column;
    align-items: flex-start;
  }

  .card,
  .resource-card,
  .mode-card {
    padding: 2rem 1.75rem;
  }

  .contact__grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .contact-card {
    padding: 2rem 1.75rem;
  }

  .hero__headline {
    font-size: clamp(1.8rem, 8vw, 2.5rem);
  }

  .hero__features {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .hero__feature-item {
    padding: 1.25rem 1rem;
    min-height: auto;
  }

  .hero__trust-info-item {
    min-height: auto;
  }

  .hero__stat-card {
    min-height: auto;
  }

  .hero__cta-group {
    flex-direction: column;
  }

  .btn--hero {
    width: 100%;
    justify-content: center;
  }

  .hero__stats-panel {
    padding: 2rem 1.5rem;
  }

  .hero__stats-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .hero__stat-value {
    font-size: 1.75rem;
  }

  .site-nav {
    position: absolute;
    inset: 100% 0 auto 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    border: 1px solid rgba(108, 114, 138, 0.12);
    transform-origin: top;
    transform: scaleY(0);
    opacity: 0;
    transition: transform 0.2s ease, opacity 0.2s ease;
    gap: 0.8rem;
  }

  .nav-toggle:checked ~ .site-nav {
    transform: scaleY(1);
    opacity: 1;
  }

  .site-nav a {
    width: 100%;
    padding: 0.75rem 0.9rem;
    font-size: 1rem;
  }

  .hero__stats {
    flex-direction: column;
  }

  .hero__actions,
  .contact-card__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .contact-card__actions .btn {
    width: 100%;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}