/* =========================================================
   茶道新生活 · 官网主样式
   品牌色：茶绿（#3f6b3a / #5a8a4e）+ 暖金（#c8a96a）
   ========================================================= */

:root {
  --primary: #3f6b3a;
  --primary-light: #5a8a4e;
  --primary-dark: #2c4d28;
  --accent: #c8a96a;
  --accent-light: #e1c692;
  --ink: #1d1d1f;
  --text: #2d2a26;
  --muted: #6b6862;
  --bg: #ffffff;
  --bg-soft: #faf8f3;
  --line: rgba(0, 0, 0, 0.08);
  --shadow-sm: 0 2px 8px rgba(63, 107, 58, 0.08);
  --shadow-md: 0 8px 24px rgba(63, 107, 58, 0.12);
  --shadow-lg: 0 16px 40px rgba(63, 107, 58, 0.18);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Hiragino Sans GB", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body { min-height: 100vh; }

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

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

button { font-family: inherit; cursor: pointer; }

.homepage { min-height: 100vh; background: var(--bg); overflow-x: hidden; }

/* ===================== 导航栏 ===================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
  transition: background .3s, box-shadow .3s;
}
.navbar.scrolled { background: rgba(255, 255, 255, 0.98); box-shadow: var(--shadow-sm); }

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-circle {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 12px rgba(63, 107, 58, 0.18);
  overflow: hidden;
}
.logo-img { max-width: 100%; max-height: 100%; object-fit: contain; }
.logo-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 1px;
}

.nav-menu { display: flex; align-items: center; gap: 36px; }
.nav-link {
  position: relative;
  color: #555;
  font-size: 15px;
  transition: color .25s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -8px;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .25s ease;
}
.nav-link:hover { color: var(--primary); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-menu-trigger {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  border: none; background: transparent;
  color: #333; border-radius: 8px;
  transition: background .2s, color .2s;
}
.nav-menu-trigger:hover { background: rgba(0,0,0,0.05); color: var(--primary); }

/* ===================== 移动端菜单 ===================== */
.mobile-menu-backdrop {
  position: fixed; inset: 0; z-index: 1100;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(2px);
  opacity: 0;
  transition: opacity .25s ease;
}
.mobile-menu-backdrop.show { opacity: 1; }

.mobile-menu-panel {
  position: fixed;
  top: 0; right: 0;
  width: 280px; max-width: 85vw;
  height: 100vh;
  z-index: 1101;
  background: #fff;
  box-shadow: -4px 0 24px rgba(0,0,0,0.12);
  display: flex; flex-direction: column;
  transform: translateX(100%);
  transition: transform .25s ease;
}
.mobile-menu-panel.show { transform: translateX(0); }

.mobile-menu-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}
.mobile-menu-title { font-size: 18px; font-weight: 600; color: #333; }
.mobile-menu-close {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border: none; background: transparent;
  color: #666; border-radius: 8px;
  transition: background .2s, color .2s;
}
.mobile-menu-close:hover { background: rgba(0,0,0,0.05); color: var(--primary); }

.mobile-menu-links {
  padding: 12px 0;
  display: flex; flex-direction: column;
}
.mobile-menu-link {
  padding: 14px 20px;
  font-size: 16px;
  color: #333;
  transition: background .2s, color .2s;
}
.mobile-menu-link:hover { background: rgba(63,107,58,0.08); color: var(--primary); }

/* ===================== Hero 区 ===================== */
.hero-section {
  position: relative;
  min-height: 720px;
  display: flex;
  align-items: center;
  background: #2c3a2a;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; overflow: hidden; }

/* 渐变底色：暮色 + 茶汤光晕 */
.hero-bg-gradient {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 78% 28%, rgba(200, 169, 106, 0.30) 0%, rgba(200, 169, 106, 0) 55%),
    radial-gradient(ellipse at 18% 70%, rgba(90, 138, 78, 0.55) 0%, rgba(90, 138, 78, 0) 60%),
    linear-gradient(160deg, #1d2c1d 0%, #2c4d28 45%, #3f6b3a 80%, #4d7a44 100%);
}

/* 远山 SVG */
.hero-mountains {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  width: 100%;
  height: 56%;
  display: block;
}

/* 茶杯 SVG */
.hero-tea {
  position: absolute;
  right: 6%;
  top: 18%;
  width: 360px;
  height: 360px;
  filter: drop-shadow(0 12px 30px rgba(0, 0, 0, 0.35));
  opacity: 0.95;
}
.hero-tea .steam { transform-origin: center; animation: steamRise 4s ease-in-out infinite; }
.hero-tea .steam.s2 { animation-delay: 0.8s; }
.hero-tea .steam.s3 { animation-delay: 1.6s; }
@keyframes steamRise {
  0%   { opacity: 0.0; transform: translateY(8px) scaleY(0.85); }
  35%  { opacity: 0.55; }
  100% { opacity: 0.0; transform: translateY(-14px) scaleY(1.05); }
}

/* "茶" 字水墨大字水印 */
.hero-stamp {
  position: absolute;
  left: -3%;
  bottom: -8%;
  font-family: "STKaiti", "KaiTi", "Songti SC", "STSong", serif;
  font-size: 640px;
  line-height: 1;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.05);
  pointer-events: none;
  user-select: none;
}

.hero-eyebrow {
  margin: 0 0 18px;
  font-size: 13px;
  letter-spacing: 6px;
  color: var(--accent-light);
  font-weight: 500;
  text-shadow: 0 1px 8px rgba(0,0,0,0.3);
}

.hero-content {
  position: relative; z-index: 10;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 120px 24px 80px;
}

.hero-text { color: #fff; max-width: 720px; }

.hero-title {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 2px;
  margin: 0 0 24px;
  text-shadow: 0 2px 16px rgba(0,0,0,0.35);
}
.hero-title-line1, .hero-title-line2 { display: block; }

.hero-description {
  font-size: 22px;
  line-height: 1.6;
  margin: 0 0 40px;
  opacity: 0.95;
  letter-spacing: 1px;
  text-shadow: 0 1px 8px rgba(0,0,0,0.35);
}

.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }

.btn-primary, .btn-secondary {
  position: relative;
  overflow: hidden;
  border: none;
  padding: 14px 36px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 12px;
  letter-spacing: 1px;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
}
.btn-primary {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 20px rgba(0,0,0,0.18);
}
.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 40%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.85), transparent);
  transform: skewX(-20deg);
  animation: btn-shine 2.6s ease-in-out infinite;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(0,0,0,0.25); }

.btn-secondary {
  background: rgba(255,255,255,0.12);
  color: #fff;
  border: 2px solid rgba(255,255,255,0.45);
  backdrop-filter: blur(8px);
}
.btn-secondary:hover { background: rgba(255,255,255,0.22); border-color: #fff; }

@keyframes btn-shine {
  0%   { transform: translateX(-150%) skewX(-20deg); }
  100% { transform: translateX(350%) skewX(-20deg); }
}

.hero-bg-decoration { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.bg-circle {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  animation: float 8s ease-in-out infinite;
}
.circle-1 { width: 380px; height: 380px; top: -180px; right: -160px; animation-delay: 0s; }
.circle-2 { width: 280px; height: 280px; bottom: -140px; left: -120px; animation-delay: 2s; }
.circle-3 { width: 180px; height: 180px; top: 55%; right: 8%; animation-delay: 4s; }

.circle-meteor-orbit { position: absolute; inset: 0; animation: meteor-orbit 8s linear infinite; }
@media (min-width: 769px) { .circle-meteor-orbit { display: none; } }
.circle-meteor {
  position: absolute; top: 0; left: 50%;
  width: 8px; height: 8px;
  margin-left: -4px; margin-top: -4px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #fff 0%, rgba(255,255,255,0.9) 25%, rgba(220,255,220,0.5) 60%, transparent 80%);
  box-shadow: 0 0 18px 4px rgba(255,255,255,0.7), 0 0 36px 12px rgba(220,255,220,0.4);
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-22px) rotate(180deg); }
}
@keyframes meteor-orbit {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* ===================== 通用 section ===================== */
.section-container { max-width: 1200px; margin: 0 auto; padding: 80px 24px; }

.section-header { text-align: center; margin-bottom: 56px; }
.section-title {
  font-size: 38px; font-weight: 700;
  color: var(--ink); margin: 0 0 14px;
  letter-spacing: 1px;
}
.section-subtitle {
  font-size: 17px; color: var(--muted);
  margin: 0; letter-spacing: 0.5px;
}

/* ===================== 产品/服务 ===================== */
.modules-section {
  scroll-margin-top: 60px;
  background: #fff;
  padding: 80px 0 12px;
}
.modules-section-inner { width: 100%; }

.modules-header { padding: 0 16px; }

.modules-layout { display: flex; flex-direction: column; gap: 12px; margin-top: 12px; }
.modules-grid-half {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.module-card {
  position: relative;
  overflow: hidden;
  display: block;
  width: 100%;
  min-height: 80vh;
  cursor: default;
  text-decoration: none;
  color: inherit;
  transition: opacity .3s ease;
}
.module-card:hover { opacity: 0.985; }

.module-card-bg-wrap { position: absolute; inset: 0; overflow: hidden; }

/* 主题渐变背景 */
.module-card-bg-gradient {
  position: absolute; inset: 0;
  transform: scale(1.04);
  transition: transform 6s ease;
}
.module-card:hover .module-card-bg-gradient { transform: scale(1.08); }

.theme-jade .module-card-bg-gradient {
  background:
    radial-gradient(ellipse at 25% 30%, rgba(255,255,255,0.10) 0%, transparent 55%),
    linear-gradient(135deg, #1f3a2c 0%, #2f5a3f 45%, #3f6b3a 100%);
}
.theme-cream .module-card-bg-gradient {
  background:
    radial-gradient(ellipse at 70% 30%, rgba(255,255,255,0.55) 0%, transparent 60%),
    linear-gradient(135deg, #f4ead4 0%, #e7d6ad 50%, #d6bf86 100%);
}
.theme-mountain .module-card-bg-gradient {
  background:
    linear-gradient(180deg, rgba(20,40,40,0.10) 0%, rgba(20,40,40,0.55) 100%),
    linear-gradient(135deg, #2c4a4a 0%, #3f6b6b 35%, #5b8a8a 70%, #2c4a4a 100%);
}
.theme-ink .module-card-bg-gradient {
  background:
    radial-gradient(ellipse at 30% 40%, rgba(255,255,255,0.08) 0%, transparent 60%),
    linear-gradient(135deg, #1a1a1a 0%, #2c2a26 50%, #3d3a30 100%);
}
.theme-gold .module-card-bg-gradient {
  background:
    radial-gradient(ellipse at 70% 60%, rgba(255,255,255,0.45) 0%, transparent 60%),
    linear-gradient(135deg, #f5e9c8 0%, #e7cf94 55%, #c8a96a 100%);
}

/* 中文大字水印 */
.module-card-watermark {
  position: absolute;
  right: 6%;
  bottom: -6%;
  font-family: "STKaiti", "KaiTi", "Kaiti SC", "楷体", "STSong", serif;
  font-size: clamp(280px, 48vw, 720px);
  font-weight: 400;
  line-height: 0.9;
  pointer-events: none;
  user-select: none;
  letter-spacing: 0;
  z-index: 0;
}
.theme-jade .module-card-watermark,
.theme-mountain .module-card-watermark { color: rgba(255,255,255,0.10); }
.theme-cream .module-card-watermark { color: rgba(120, 80, 30, 0.10); }
.theme-ink .module-card-watermark { color: rgba(255,255,255,0.06); }
.theme-gold .module-card-watermark { color: rgba(120, 80, 30, 0.12); }

/* 装饰圆斑纹理 */
.module-card-pattern {
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 12% 18%, rgba(255,255,255,0.06) 0%, transparent 14%),
    radial-gradient(circle at 80% 70%, rgba(255,255,255,0.05) 0%, transparent 18%),
    radial-gradient(circle at 50% 90%, rgba(0,0,0,0.06) 0%, transparent 22%);
  pointer-events: none;
}
.theme-cream .module-card-pattern,
.theme-gold .module-card-pattern {
  background:
    radial-gradient(circle at 12% 18%, rgba(120,80,30,0.06) 0%, transparent 16%),
    radial-gradient(circle at 80% 70%, rgba(120,80,30,0.04) 0%, transparent 20%),
    radial-gradient(circle at 50% 90%, rgba(120,80,30,0.05) 0%, transparent 24%);
}

/* eyebrow 副标题 */
.module-eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 6px;
  margin: 0 0 14px;
  opacity: 0.85;
}
.text-light .module-eyebrow { color: var(--accent-light); }
.text-dark .module-eyebrow { color: var(--primary); }

.module-card-content {
  position: relative; z-index: 1;
  height: 100%;
  display: flex; flex-direction: column;
  align-items: center; justify-content: flex-start;
  padding: 64px 24px;
  text-align: center;
}
.module-title {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 600;
  margin: 0 0 12px;
  letter-spacing: 1px;
}
.module-description {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.7;
  margin: 14px 0 24px;
  max-width: 720px;
}

.text-light .module-title,
.text-light .module-description {
  color: #fff;
  text-shadow: 0 2px 6px rgba(0,0,0,0.45);
}
.text-dark .module-title,
.text-dark .module-description {
  color: var(--ink);
  text-shadow: 0 1px 2px rgba(255,255,255,0.6);
}

.cta-link { display: inline-block; margin-top: 28px; }
.cta-style-btn {
  display: inline-flex; align-items: center; gap: 8px;
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, rgba(63,107,58,0.85) 0%, rgba(90,138,78,0.85) 100%);
  color: #fff;
  padding: 14px 30px;
  font-size: 16px; font-weight: 600;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(63,107,58,0.25);
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
}
.cta-style-btn::before {
  content: ''; position: absolute; top: 0; left: 0;
  width: 40%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.55), transparent);
  transform: skewX(-20deg);
  animation: btn-shine 2.6s ease-in-out infinite;
}
.cta-style-btn:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, rgba(63,107,58,0.95) 0%, rgba(90,138,78,0.95) 100%);
  box-shadow: 0 12px 26px rgba(63,107,58,0.32);
}
.link-arrow { transition: transform .2s ease; }
.cta-style-btn:hover .link-arrow { transform: translateX(4px); }

/* ===================== 数据统计 · 行走足迹 ===================== */
.stats-section {
  position: relative;
  padding: 90px 24px 96px;
  color: #fff;
  overflow: hidden;
  background: #1d2c1d;
  scroll-margin-top: 80px;
}
.stats-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(200, 169, 106, 0.18) 0%, rgba(200, 169, 106, 0) 55%),
    radial-gradient(ellipse at 80% 75%, rgba(90, 138, 78, 0.30) 0%, rgba(90, 138, 78, 0) 60%),
    linear-gradient(135deg, #1d2c1d 0%, #2c4d28 50%, #1d2c1d 100%);
}
.stats-section .section-container { padding: 0; max-width: 1200px; margin: 0 auto; }
.stats-section .section-header { position: relative; z-index: 1; }
.stats-eyebrow { color: var(--accent-light) !important; }
.stats-title { color: #fff !important; }
.stats-subtitle { color: rgba(255,255,255,0.78) !important; }

.stats-grid {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 24px;
}
.stat-item {
  text-align: center;
  padding: 32px 20px;
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 18px;
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(6px);
  transition: transform .25s ease, background .25s ease, border-color .25s ease;
}
.stat-item:hover {
  transform: translateY(-4px);
  background: rgba(255,255,255,0.08);
  border-color: rgba(200,169,106,0.45);
}
.stat-number {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 6px;
  margin-bottom: 12px;
  color: var(--accent-light);
  font-weight: 700;
  letter-spacing: 1px;
}
.stat-number .num {
  font-size: 56px;
  line-height: 1;
  font-family: "Helvetica Neue", "Segoe UI", Roboto, "PingFang SC", sans-serif;
}
.stat-number .unit { font-size: 18px; opacity: 0.85; }
.stat-label {
  font-size: 15px;
  color: rgba(255,255,255,0.86);
  letter-spacing: 1px;
}

/* ===================== 关于我们 ===================== */
.about-section {
  position: relative;
  padding: 96px 24px 104px;
  background: linear-gradient(180deg, #f5f1e8 0%, #ece4d2 50%, #f5f1e8 100%);
  overflow: hidden;
  scroll-margin-top: 80px;
}
.about-container {
  position: relative; z-index: 1;
  max-width: 880px; margin: 0 auto;
  text-align: center;
}
.about-subtitle {
  font-size: 13px; font-weight: 600;
  color: var(--accent);
  letter-spacing: 4px;
  text-transform: uppercase;
  margin: 0 0 12px;
}
.about-title {
  font-size: 36px; font-weight: 700;
  color: var(--ink);
  margin: 0 0 32px;
  letter-spacing: 2px;
}
.about-content { text-align: left; padding: 0 8px; }
.about-paragraph {
  font-size: 16px; line-height: 1.95;
  color: #4a4640;
  margin: 0 0 18px;
  letter-spacing: 0.4px;
}
.about-paragraph--lead {
  font-size: 18px; color: #2d2a26; font-weight: 500;
}
.about-paragraph:last-child { margin-bottom: 0; }

.about-bg-decoration {
  position: absolute;
  top: -20%; right: -15%;
  width: 50%; height: 60%;
  background: radial-gradient(ellipse at center, rgba(200,169,106,0.20) 0%, transparent 70%);
  pointer-events: none;
}

/* ===================== 联系/留资 ===================== */
.features-section {
  scroll-margin-top: 80px;
  background: #fff;
}

.join-form-wrap { max-width: 540px; margin: 0 auto; }
.join-form-card {
  position: relative;
  padding: 48px 56px 40px;
  background: linear-gradient(145deg, #ffffff 0%, #fbf8f1 100%);
  border-radius: 24px;
  box-shadow:
    0 4px 6px rgba(0,0,0,0.02),
    0 12px 40px rgba(63,107,58,0.10),
    0 0 0 1px rgba(63,107,58,0.06);
  overflow: hidden;
}
.join-form-card::before {
  content: '';
  position: absolute; inset: 0;
  border-radius: 24px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(63,107,58,0.30) 0%, rgba(200,169,106,0.25) 50%, rgba(63,107,58,0.30) 100%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
          mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}

.join-form { display: flex; flex-direction: column; gap: 18px; }
.form-item label {
  display: block;
  font-size: 13px; font-weight: 600;
  color: #555;
  letter-spacing: 0.4px;
  margin-bottom: 8px;
}
.input-wrap {
  position: relative;
  display: flex; align-items: center;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.08);
  transition: box-shadow .25s ease;
  padding-left: 14px;
}
.input-wrap:hover { box-shadow: 0 0 0 1px rgba(63,107,58,0.30); }
.input-wrap:focus-within { box-shadow: 0 0 0 2px rgba(63,107,58,0.45); }
.input-icon { display: inline-flex; color: var(--primary); margin-right: 8px; }
.input-wrap input {
  flex: 1; min-width: 0;
  height: 46px;
  border: none; outline: none;
  font-size: 16px;
  background: transparent;
  padding: 8px 14px 8px 4px;
  color: var(--ink);
}
.input-wrap input::placeholder { color: #aaa; font-size: 15px; }

.form-error {
  margin: 6px 0 0 4px;
  font-size: 12px;
  color: #d9534f;
  min-height: 14px;
}

.join-submit-btn {
  position: relative; overflow: hidden;
  margin-top: 8px;
  width: 100%;
  padding: 16px 24px;
  font-size: 16px; font-weight: 600;
  color: #fff;
  letter-spacing: 4px;
  border: none; border-radius: 14px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  box-shadow: 0 8px 20px rgba(63,107,58,0.30);
  transition: transform .25s ease, box-shadow .25s ease;
}
.join-submit-btn::before {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 40%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.55), transparent);
  transform: skewX(-20deg);
  animation: btn-shine 2.6s ease-in-out infinite;
}
.join-submit-btn:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(63,107,58,0.40); }
.join-submit-btn:disabled { opacity: 0.7; cursor: not-allowed; }

/* ===================== 页脚 ===================== */
.footer {
  background: #1a1a1a;
  color: #999;
  padding: 60px 24px 24px;
}
.footer-container { max-width: 1200px; margin: 0 auto; }

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  margin-bottom: 40px;
}

.footer-brand { display: flex; align-items: center; gap: 16px; }
.footer-logo-wrap {
  flex-shrink: 0;
  width: 50px; height: 50px;
  display: flex; align-items: center; justify-content: center;
  background: #fff; border-radius: 50%;
  overflow: hidden;
}
.footer-logo-img { max-width: 100%; max-height: 100%; object-fit: contain; }

.footer-brand-text { display: flex; flex-direction: column; gap: 4px; }
.footer-desc-line { font-size: 14px; line-height: 1.6; margin: 0; }
.footer-desc-brand { font-size: 18px; font-weight: 600; color: #fff; }

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.footer-column h4 {
  color: #fff; font-size: 16px; font-weight: 600;
  margin: 0 0 16px;
}
.footer-column a {
  display: block;
  color: #999;
  font-size: 14px;
  margin-bottom: 12px;
  transition: color .25s ease;
  -webkit-tap-highlight-color: transparent;
}
@media (hover: hover) {
  .footer-column a:hover { color: var(--accent-light); }
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid #333;
}
.footer-bottom p { margin: 0 0 8px; font-size: 14px; color: #999; }
.footer-bottom p:last-child { margin-bottom: 0; }
.beian-info { margin-top: 8px; }
.beian-link {
  color: #999;
  font-size: 14px;
  transition: color .25s ease;
}
.beian-link:hover { color: var(--accent-light); text-decoration: underline; }

/* ===================== 回到顶部 ===================== */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
  width: 46px; height: 46px;
  border-radius: 50%;
  border: none;
  background: rgba(63,107,58,0.85);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(0,0,0,0.25);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity .25s ease, transform .25s ease, background .25s ease;
}
.back-to-top.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover { background: var(--primary); }

/* ===================== 响应式 ===================== */
@media (max-width: 768px) {
  .nav-container { padding: 0 14px; }
  .nav-menu-desktop { display: none; }
  .nav-menu-trigger { display: flex; }

  .hero-section {
    min-height: 100vh; min-height: 100dvh;
    height: 100vh; height: 100dvh;
  }
  .hero-content {
    padding: 100px 18px 60px;
  }
  .hero-title {
    font-size: clamp(28px, 8vw, 42px);
    line-height: 1.4;
    letter-spacing: 1px;
  }
  .hero-description { font-size: clamp(15px, 4.5vw, 18px); }
  .hero-buttons .btn-primary,
  .hero-buttons .btn-secondary {
    padding: 12px 24px; font-size: 15px;
  }
  .hero-eyebrow { font-size: 11px; letter-spacing: 4px; margin-bottom: 12px; }
  .hero-tea {
    width: 200px; height: 200px;
    right: 50%;
    transform: translateX(50%);
    top: auto; bottom: 28%;
    opacity: 0.55;
  }
  .hero-stamp { font-size: 360px; bottom: -6%; left: -10%; }
  .hero-mountains { height: 38%; }

  .stats-section { padding: 64px 16px 72px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .stat-item { padding: 22px 12px; border-radius: 14px; }
  .stat-number .num { font-size: 36px; }
  .stat-number .unit { font-size: 14px; }
  .stat-label { font-size: 13px; letter-spacing: 0.5px; }

  .modules-section { padding: 48px 0 12px; }
  .module-card { min-height: min(80vh, 600px); height: min(80vh, 680px); max-height: 80vh; }
  .modules-grid-half { grid-template-columns: 1fr; }

  .module-card-content { padding: 44px 18px; }
  .module-card-content .cta-style-btn {
    padding: 12px 22px; font-size: 14px;
  }

  .section-container { padding: 56px 16px; }
  .section-title { font-size: 28px; }
  .section-subtitle { font-size: 15px; }

  .about-section { padding: 64px 18px 72px; }
  .about-title { font-size: 26px; }
  .about-paragraph { font-size: 15px; line-height: 1.85; }
  .about-paragraph--lead { font-size: 16px; }

  .join-form-wrap { padding: 0 4px; }
  .join-form-card { padding: 32px 22px 28px; border-radius: 20px; }

  .footer { padding: 48px 18px 22px; }
  .footer-content { grid-template-columns: 1fr; gap: 36px; }
  .footer-links { grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .footer-column a { font-size: 13px; margin-bottom: 10px; }

  .back-to-top { right: 16px; bottom: 16px; width: 42px; height: 42px; }
}

@media (max-width: 420px) {
  .footer-links { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 769px) {
  .mobile-menu-backdrop, .mobile-menu-panel { display: none !important; }
}