/* ==========================================
   悠游自驾 - 主样式表
   清新自然 · 绿色系 · 优雅字体
   ========================================== */

:root {
  --green-50:  #f0faf4;
  --green-100: #d6f0e0;
  --green-200: #aee0c1;
  --green-400: #5cb87a;
  --green-500: #3a9e5f;
  --green-600: #2d8050;
  --green-700: #1f6040;
  --brown-100: #f5ede0;
  --brown-300: #d4a96a;
  --brown-500: #9a6b3a;
  --sky-100:   #e8f4fd;
  --sky-400:   #60b8e8;
  --sky-600:   #2980b9;
  --gray-50:   #fafafa;
  --gray-100:  #f4f4f4;
  --gray-200:  #e8e8e8;
  --gray-400:  #9e9e9e;
  --gray-600:  #555555;
  --gray-800:  #2c2c2c;
  --gold:      #e8b84b;
  --white:     #ffffff;
  --shadow-sm: 0 2px 8px rgba(0,0,0,.08);
  --shadow-md: 0 6px 24px rgba(0,0,0,.12);
  --shadow-lg: 0 16px 48px rgba(0,0,0,.16);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: all .3s ease;
  --font-serif: 'Noto Serif SC', 'SimSun', serif;
  --font-sans:  'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--gray-800);
  background: var(--white);
  overflow-x: hidden;
}

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

/* ---- 容器 ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================
   导航栏
   ========================================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 40px;
  height: 64px;
  display: flex;
  align-items: center;
  transition: var(--transition);
  background: transparent;
}
.navbar.scrolled {
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}
.nav-container {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--white);
  transition: var(--transition);
}
.navbar.scrolled .logo { color: var(--green-600); }
.logo-icon { font-size: 24px; }
.nav-links {
  display: flex;
  gap: 36px;
}
.nav-links a {
  font-size: 15px;
  font-weight: 400;
  color: rgba(255,255,255,.9);
  transition: var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--green-400);
  transform: scaleX(0);
  transition: var(--transition);
}
.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }
.navbar.scrolled .nav-links a { color: var(--gray-600); }
.navbar.scrolled .nav-links a:hover { color: var(--green-600); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

/* ==========================================
   Hero 英雄区
   ========================================== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    160deg,
    rgba(15,40,25,.55) 0%,
    rgba(20,60,40,.4) 50%,
    rgba(10,30,20,.6) 100%
  );
  z-index: 1;
}

/* --- SVG 风景插画 --- */
.hero-scene {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, #2d6a8a 0%, #4a9aba 30%, #87ceeb 50%, #c8e6c9 65%, #81c784 80%, #4caf50 100%);
}
.sun {
  position: absolute;
  top: 12%; right: 18%;
  width: 90px; height: 90px;
  border-radius: 50%;
  background: radial-gradient(circle, #fff9c4 30%, #ffe082 60%, #ffb74d 100%);
  box-shadow: 0 0 60px rgba(255,200,80,.6), 0 0 120px rgba(255,200,80,.3);
  animation: sunPulse 4s ease-in-out infinite;
}
@keyframes sunPulse {
  0%,100% { box-shadow: 0 0 60px rgba(255,200,80,.6), 0 0 120px rgba(255,200,80,.3); }
  50%      { box-shadow: 0 0 80px rgba(255,200,80,.8), 0 0 160px rgba(255,200,80,.4); }
}
.cloud {
  position: absolute;
  background: rgba(255,255,255,.85);
  border-radius: 50px;
  animation: cloudDrift linear infinite;
}
.cloud::before,.cloud::after {
  content:'';
  position:absolute;
  background: rgba(255,255,255,.85);
  border-radius: 50%;
}
.cloud1 { top:15%; left:-80px; width:120px; height:36px; animation-duration:28s; animation-delay:0s; }
.cloud1::before { width:60px;height:60px; top:-28px; left:20px; }
.cloud1::after  { width:40px;height:40px; top:-20px; left:55px; }
.cloud2 { top:24%; left:-60px; width:80px; height:24px; animation-duration:22s; animation-delay:-10s; }
.cloud2::before { width:40px;height:40px; top:-18px; left:12px; }
.cloud2::after  { width:28px;height:28px; top:-12px; left:38px; }
.cloud3 { top:10%; left:-100px; width:100px; height:30px; animation-duration:35s; animation-delay:-18s; }
.cloud3::before { width:50px;height:50px; top:-24px; left:16px; }
.cloud3::after  { width:36px;height:36px; top:-16px; left:48px; }
@keyframes cloudDrift {
  from { transform: translateX(0); }
  to   { transform: translateX(calc(100vw + 200px)); }
}
.mountain {
  position: absolute;
  bottom: 0;
  clip-path: polygon(0% 100%, 50% 0%, 100% 100%);
}
.mountain-far {
  left: -5%; width: 55%; height: 62%;
  background: linear-gradient(180deg, #558b5e 0%, #2d6a4f 100%);
  bottom: 18%;
  opacity: .7;
}
.mountain-mid {
  left: 30%; width: 50%; height: 72%;
  background: linear-gradient(180deg, #6ab187 0%, #2d6a4f 100%);
  bottom: 14%;
  opacity: .85;
}
.mountain-near {
  right: -5%; width: 55%; height: 58%;
  background: linear-gradient(180deg, #4a8c6a 0%, #1b4f36 100%);
  bottom: 10%;
  opacity: .9;
}
.road {
  position: absolute;
  bottom: 0; left: 50%; transform: translateX(-50%);
  width: 6%; height: 28%;
  background: linear-gradient(180deg, #b0b0b0 0%, #888 100%);
  clip-path: polygon(30% 0%, 70% 0%, 100% 100%, 0% 100%);
}
.car {
  position: absolute;
  bottom: 8%; left: 50%;
  transform: translateX(-50%);
  width: 48px; height: 24px;
  animation: carDrive 6s ease-in-out infinite;
}
.car::before {
  content: '🚙';
  font-size: 32px;
  position: absolute;
  bottom: 0;
}
@keyframes carDrive {
  0%,100% { transform: translateX(-50%) scale(1); }
  50%      { transform: translateX(-50%) scale(1.04); }
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 0 60px;
  max-width: 700px;
}
.hero-sub {
  font-size: 14px;
  letter-spacing: 4px;
  color: rgba(255,255,255,.75);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 7vw, 5.5rem);
  line-height: 1.15;
  color: var(--white);
  text-shadow: 0 2px 20px rgba(0,0,0,.3);
  margin-bottom: 20px;
}
.hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,.82);
  line-height: 1.8;
  margin-bottom: 36px;
}
.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: var(--green-500);
  color: var(--white);
  box-shadow: 0 4px 20px rgba(58,158,95,.4);
}
.btn-primary:hover {
  background: var(--green-600);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(58,158,95,.5);
}
.btn-outline {
  border: 2px solid rgba(255,255,255,.8);
  color: var(--white);
  backdrop-filter: blur(4px);
}
.btn-outline:hover {
  background: rgba(255,255,255,.15);
  transform: translateY(-2px);
}
.hero-scroll {
  position: absolute;
  bottom: 36px; left: 60px;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,.6);
  font-size: 12px;
  letter-spacing: 2px;
}
.scroll-line {
  width: 1px; height: 40px;
  background: rgba(255,255,255,.4);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%,100% { opacity:.4; transform:scaleY(1); }
  50%      { opacity:1;  transform:scaleY(1.1); }
}

/* ==========================================
   公共区块头部
   ========================================== */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-header h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  color: var(--gray-800);
  margin: 10px 0 14px;
}
.section-header p {
  font-size: 15px;
  color: var(--gray-400);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.7;
}
.section-header.light h2 { color: var(--white); }
.section-header.light p  { color: rgba(255,255,255,.7); }
.section-tag {
  display: inline-block;
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 12px;
  letter-spacing: 3px;
  background: var(--green-100);
  color: var(--green-600);
  text-transform: uppercase;
}
.tag-light {
  background: rgba(255,255,255,.2);
  color: rgba(255,255,255,.9);
}

/* ==========================================
   目的地大卡片
   ========================================== */
.destinations {
  padding: 100px 0;
  background: var(--gray-50);
}
.dest-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.dest-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  cursor: pointer;
}
.dest-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}
.dest-card-img {
  position: relative;
  height: 280px;
  overflow: hidden;
}

/* --- 大湾区插画场景 --- */
.bay-scene {
  width: 100%; height: 100%;
  position: relative;
}
.bay-sky {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, #1a3d6e 0%, #2980b9 40%, #87ceeb 70%, #b0e0e6 100%);
}
.bay-sea {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 45%;
  background: linear-gradient(180deg, #1565c0 0%, #0d47a1 100%);
}
.bay-sea::after {
  content:'';
  position:absolute;
  top:0; left:0; right:0;
  height:6px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.3), transparent);
  animation: wave 3s ease-in-out infinite;
}
@keyframes wave {
  0%,100% { transform:translateX(-10%); }
  50%      { transform:translateX(10%); }
}
.bay-city {
  position: absolute;
  bottom: 42%;
  left: 0; right: 0;
  height: 30%;
  background:
    /* 建筑群 */
    linear-gradient(180deg,transparent 0%,#1a237e 0%) no-repeat 5%  bottom / 18px 80%,
    linear-gradient(180deg,transparent 0%,#283593 0%) no-repeat 9%  bottom / 14px 60%,
    linear-gradient(180deg,transparent 0%,#1a237e 0%) no-repeat 13% bottom / 20px 90%,
    linear-gradient(180deg,transparent 0%,#303f9f 0%) no-repeat 18% bottom / 16px 70%,
    linear-gradient(180deg,transparent 0%,#1565c0 0%) no-repeat 22% bottom / 12px 85%,
    linear-gradient(180deg,transparent 0%,#0d47a1 0%) no-repeat 26% bottom / 22px 65%,
    linear-gradient(180deg,transparent 0%,#1a237e 0%) no-repeat 55% bottom / 18px 80%,
    linear-gradient(180deg,transparent 0%,#283593 0%) no-repeat 60% bottom / 14px 95%,
    linear-gradient(180deg,transparent 0%,#1565c0 0%) no-repeat 65% bottom / 16px 70%,
    linear-gradient(180deg,transparent 0%,#0d47a1 0%) no-repeat 70% bottom / 20px 88%,
    linear-gradient(180deg,transparent 0%,#1a237e 0%) no-repeat 75% bottom / 12px 60%,
    linear-gradient(180deg,transparent 0%,#303f9f 0%) no-repeat 80% bottom / 24px 75%;
}
.bay-bridge {
  position: absolute;
  bottom: 38%;
  left: 28%; right: 22%;
  height: 10px;
  background: #eceff1;
  border-radius: 4px;
}
.bay-bridge::before,.bay-bridge::after {
  content:'';
  position:absolute;
  top:-24px;
  width:2px; height:24px;
  background:#eceff1;
  border-radius:2px;
}
.bay-bridge::before { left:25%; }
.bay-bridge::after  { left:65%; }

/* --- 川藏场景 --- */
.tibet-scene {
  width:100%; height:100%;
  position: relative;
}
.tibet-sky {
  position:absolute; inset:0;
  background: linear-gradient(180deg, #1a2980 0%, #26d0ce 50%, #a8edea 75%, #e8f5e9 100%);
}
.tibet-mountain {
  position:absolute; bottom:0;
  clip-path: polygon(0% 100%,50% 0%,100% 100%);
}
.tibet-m1 {
  left:-5%; width:60%; height:75%;
  background: linear-gradient(180deg, #fff 0% 25%, #b0bec5 26%, #546e7a 100%);
}
.tibet-m2 {
  left:25%; width:55%; height:85%;
  background: linear-gradient(180deg, #fff 0% 30%, #90a4ae 31%, #37474f 100%);
}
.tibet-m3 {
  right:-5%; width:50%; height:65%;
  background: linear-gradient(180deg, #fff 0% 20%, #b0bec5 21%, #455a64 100%);
}
.tibet-road {
  position:absolute;
  bottom:0; left:45%; transform:translateX(-50%);
  width:8%; height:30%;
  background: linear-gradient(180deg, #bdbdbd 0%, #757575 100%);
  clip-path: polygon(25% 0%,75% 0%,100% 100%,0% 100%);
}
.tibet-flag {
  position:absolute;
  bottom:28%; left:50%;
  width:16px; height:24px;
}
.tibet-flag::before {
  content:'';
  position:absolute;
  left:0; top:0;
  width:2px; height:24px;
  background:#e53935;
}
.tibet-flag::after {
  content:'';
  position:absolute;
  left:2px; top:2px;
  width:12px; height:8px;
  background:linear-gradient(90deg,#ff5722,#ffc107);
  clip-path: polygon(0 0,100% 50%,0 100%);
}

.dest-badge {
  position: absolute;
  top: 16px; right: 16px;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 500;
  background: var(--green-500);
  color: var(--white);
}
.badge-gold { background: var(--gold); color: #4a3000; }

.dest-card-body { padding: 28px 28px 32px; }
.dest-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.dest-tag { font-size: 13px; color: var(--gray-400); }
.dest-time {
  font-size: 12px;
  background: var(--green-50);
  color: var(--green-600);
  padding: 3px 10px;
  border-radius: 50px;
}
.dest-card-body h3 {
  font-family: var(--font-serif);
  font-size: 1.55rem;
  margin-bottom: 12px;
  color: var(--gray-800);
}
.dest-card-body p {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 20px;
}
.dest-stats {
  display: flex;
  gap: 24px;
  padding: 16px 0;
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
  margin-bottom: 20px;
}
.stat { display:flex; flex-direction:column; gap:2px; }
.stat strong { font-size: 1.3rem; color: var(--green-600); font-weight: 700; }
.stat span   { font-size: 12px; color: var(--gray-400); }
.dest-link {
  font-size: 14px;
  color: var(--green-600);
  font-weight: 500;
  transition: var(--transition);
}
.dest-link:hover { color: var(--green-700); letter-spacing:.5px; }

/* ==========================================
   精选攻略
   ========================================== */
.featured {
  padding: 100px 0;
  background: var(--white);
}
.article-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  grid-template-rows: auto auto;
  gap: 24px;
}
.article-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--gray-200);
  transition: var(--transition);
  cursor: pointer;
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--green-200);
}
.article-main { grid-row: span 2; display: flex; flex-direction: column; }
.article-img {
  position: relative;
  overflow: hidden;
}
.article-main .article-img { height: 280px; }
.small-img { height: 160px; }

/* 文章插图场景 */
.art-scene { width:100%; height:100%; position:relative; }
.art-scene-1 {
  background: linear-gradient(180deg, #0d1b3e 0%, #1565c0 45%, #1e88e5 70%, #0d47a1 100%);
}
.art-water {
  position:absolute; bottom:0; left:0; right:0; height:35%;
  background: linear-gradient(180deg, #1565c0 0%, #0a2472 100%);
}
.art-skyline {
  position:absolute; bottom:33%;
  left:0; right:0; height:25%;
  background:
    linear-gradient(180deg,transparent 0%,#0d1b4a 0%) no-repeat 3%  bottom/12px 70%,
    linear-gradient(180deg,transparent 0%,#162055 0%) no-repeat 7%  bottom/20px 100%,
    linear-gradient(180deg,transparent 0%,#0d1b4a 0%) no-repeat 12% bottom/14px 80%,
    linear-gradient(180deg,transparent 0%,#1a237e 0%) no-repeat 17% bottom/10px 60%,
    linear-gradient(180deg,transparent 0%,#0d1b4a 0%) no-repeat 55% bottom/16px 90%,
    linear-gradient(180deg,transparent 0%,#162055 0%) no-repeat 60% bottom/22px 100%,
    linear-gradient(180deg,transparent 0%,#0a1540 0%) no-repeat 66% bottom/12px 75%,
    linear-gradient(180deg,transparent 0%,#1a237e 0%) no-repeat 72% bottom/18px 85%,
    linear-gradient(180deg,transparent 0%,#0d1b4a 0%) no-repeat 78% bottom/14px 65%;
}
.art-sky {
  position:absolute; inset:0;
  background: linear-gradient(180deg, #0a1628 0%, #1a3a6e 60%, #2980b9 100%);
}
.art-scene-2 { background: linear-gradient(180deg, #006994 0%, #0288d1 40%, #e0f7fa 70%); }
.art-sea {
  position:absolute; bottom:0; left:0; right:0; height:40%;
  background: linear-gradient(180deg, #006994 0%, #004d6e 100%);
}
.art-coast {
  position:absolute; bottom:38%; left:0; right:0; height:12%;
  background: linear-gradient(90deg, #f4e2b0 0%, #e8d49a 50%, #f0e0a8 100%);
  clip-path: polygon(0 40%,20% 0,40% 30%,60% 5%,80% 25%,100% 0,100% 100%,0 100%);
}
.art-scene-3 {
  background: linear-gradient(180deg, #1565c0 0%, #4fc3f7 40%, #e3f2fd 65%, #a5d6a7 80%, #4caf50 100%);
}
.art-highland {
  position:absolute; bottom:0; left:0; right:0; height:45%;
  background: linear-gradient(180deg, #66bb6a 0%, #388e3c 100%);
  clip-path: polygon(0 60%,15% 20%,30% 50%,45% 10%,60% 40%,75% 5%,90% 35%,100% 15%,100% 100%,0 100%);
}
.art-snow-peak {
  position:absolute; bottom:40%; left:50%; transform:translateX(-50%);
  width:120px; height:120px;
  clip-path: polygon(50% 0%,0% 100%,100% 100%);
  background: linear-gradient(180deg, #fff 0% 35%, #90caf9 36%, #546e7a 100%);
}
.art-scene-4 { background: linear-gradient(180deg, #1a3a2a 0%, #2d6a4f 30%, #52b788 60%, #b7e4c7 80%, #d8f3dc 100%); }
.art-forest {
  position:absolute; bottom:0; left:0; right:0; height:60%;
  background: linear-gradient(180deg, #1b5e20 0%, #388e3c 50%, #4caf50 100%);
  clip-path: polygon(0 30%,5% 0,10% 25%,15% 5%,20% 30%,25% 0,30% 20%,35% 5%,40% 30%,45% 0,50% 25%,55% 10%,60% 30%,65% 5%,70% 25%,75% 0,80% 20%,85% 10%,90% 30%,95% 5%,100% 20%,100% 100%,0 100%);
}
.art-peak {
  position:absolute; top:5%; left:50%; transform:translateX(-50%);
  width:80px; height:80px;
  clip-path: polygon(50% 0%,0% 100%,100% 100%);
  background: linear-gradient(180deg, #fff 0% 30%, #cfd8dc 31%, #607d8b 100%);
}

.article-cat {
  position: absolute;
  top: 12px; left: 12px;
  padding: 3px 10px;
  border-radius: 50px;
  font-size: 11px;
  font-weight: 500;
  background: var(--green-500);
  color: var(--white);
}
.cat-tibet { background: var(--brown-500); }
.article-body {
  padding: 20px 22px 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.article-tags {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.article-tags span {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 50px;
  background: var(--green-50);
  color: var(--green-600);
  border: 1px solid var(--green-100);
}
.article-body h3 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.55;
  margin-bottom: 8px;
  color: var(--gray-800);
}
.article-main .article-body h3 { font-size: 1.25rem; }
.article-body p {
  font-size: 13px;
  color: var(--gray-600);
  line-height: 1.75;
  flex: 1;
}
.article-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--gray-100);
}
.read-time { font-size: 12px; color: var(--gray-400); }
.view-more { font-size: 13px; color: var(--green-600); font-weight:500; }

/* ==========================================
   旅行贴士
   ========================================== */
.tips {
  padding: 100px 0;
  background: linear-gradient(135deg, #1b4332 0%, #2d6a4f 50%, #1e3a5f 100%);
}
.tips-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.tip-card {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: var(--transition);
  backdrop-filter: blur(4px);
}
.tip-card:hover {
  background: rgba(255,255,255,.14);
  transform: translateY(-4px);
}
.tip-icon { font-size: 2rem; margin-bottom: 14px; }
.tip-card h4 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--white);
  margin-bottom: 10px;
}
.tip-card p {
  font-size: 13px;
  color: rgba(255,255,255,.7);
  line-height: 1.75;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
  background: var(--gray-800);
  color: rgba(255,255,255,.7);
  padding: 60px 0 0;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-brand .logo-icon { font-size: 28px; }
.footer-brand .logo-text {
  font-family: var(--font-serif);
  font-size: 22px;
  color: var(--white);
  margin-left: 8px;
}
.footer-brand p {
  font-size: 13px;
  color: rgba(255,255,255,.5);
  line-height: 1.8;
  margin-top: 12px;
}
.footer-links { display:flex; flex-direction:column; gap:10px; }
.footer-links h5 {
  font-size: 14px;
  color: var(--white);
  margin-bottom: 6px;
}
.footer-links a {
  font-size: 13px;
  color: rgba(255,255,255,.55);
  transition: var(--transition);
}
.footer-links a:hover { color: var(--green-400); }
.footer-bottom {
  text-align: center;
  padding: 20px;
  font-size: 12px;
  color: rgba(255,255,255,.3);
}

/* ==========================================
   响应式
   ========================================== */
@media (max-width: 900px) {
  .dest-cards { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: 1fr; }
  .article-main { grid-row: auto; }
  .tips-grid { grid-template-columns: 1fr 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .hero-content { padding: 0 32px; }
}
@media (max-width: 640px) {
  .navbar { padding: 0 20px; }
  .nav-links { display:none; }
  .nav-toggle { display:flex; }
  .nav-links.open {
    display:flex; flex-direction:column;
    position:fixed; top:64px; left:0; right:0;
    background:rgba(255,255,255,.97);
    padding:20px 24px;
    box-shadow: var(--shadow-md);
    gap: 16px;
  }
  .nav-links.open a { color:var(--gray-700); font-size:16px; }
  .navbar.scrolled .nav-toggle span { background: var(--gray-600); }
  .hero-content { padding: 0 24px; }
  .hero-scroll { left:24px; }
  .tips-grid { grid-template-columns: 1fr; }
  .hero-btns { flex-direction: column; align-items: flex-start; }
}

/* ==========================================
   页面内子页样式（bay-area / sichuan-tibet 共用）
   ========================================== */
.page-hero {
  height: 65vh; min-height: 400px;
  position: relative;
  display: flex; align-items: flex-end;
  overflow: hidden;
}
.page-hero-bg {
  position:absolute; inset:0;
}
.page-hero-overlay {
  position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(0,0,0,.2) 0%, rgba(0,0,0,.55) 100%);
  z-index:1;
}
.page-hero-content {
  position:relative; z-index:2;
  padding: 0 60px 52px;
  max-width: 800px;
}
.page-hero-content .page-tag {
  display:inline-block;
  padding:4px 14px; border-radius:50px;
  font-size:12px; letter-spacing:3px;
  background:rgba(255,255,255,.2); color:rgba(255,255,255,.9);
  margin-bottom:14px;
}
.page-hero-content h1 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.6rem);
  color: var(--white);
  text-shadow: 0 2px 16px rgba(0,0,0,.3);
  margin-bottom: 12px;
  line-height: 1.2;
}
.page-hero-content p {
  font-size: 15px;
  color: rgba(255,255,255,.82);
  line-height: 1.7;
}

/* 路线 Tab */
.route-tabs {
  display:flex; gap:8px; flex-wrap:wrap;
  padding: 32px 0;
}
.route-tab {
  padding: 8px 22px;
  border-radius: 50px;
  font-size: 14px;
  border: 1.5px solid var(--gray-200);
  color: var(--gray-600);
  cursor: pointer;
  transition: var(--transition);
  background: var(--white);
}
.route-tab:hover,
.route-tab.active {
  background: var(--green-500);
  border-color: var(--green-500);
  color: var(--white);
}

/* 路线时间轴 */
.timeline {
  position: relative;
  padding-left: 40px;
}
.timeline::before {
  content:'';
  position:absolute;
  left:14px; top:0; bottom:0;
  width:2px;
  background: linear-gradient(180deg, var(--green-400), var(--green-200));
}
.timeline-item {
  position:relative;
  padding-bottom: 40px;
}
.timeline-item::before {
  content:'';
  position:absolute;
  left:-32px; top:6px;
  width:14px; height:14px;
  border-radius:50%;
  background: var(--green-500);
  border:3px solid var(--white);
  box-shadow: 0 0 0 2px var(--green-300);
}
.timeline-day {
  font-size: 12px;
  color: var(--green-600);
  font-weight:600;
  letter-spacing:2px;
  margin-bottom:6px;
}
.timeline-item h4 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  margin-bottom:8px;
  color: var(--gray-800);
}
.timeline-item p {
  font-size:14px;
  color: var(--gray-600);
  line-height:1.75;
}
.timeline-spots {
  display:flex; gap:8px; flex-wrap:wrap;
  margin-top:10px;
}
.spot-tag {
  font-size:12px;
  padding:3px 10px; border-radius:50px;
  background:var(--green-50);
  color:var(--green-700);
  border:1px solid var(--green-100);
}

/* 攻略卡片 */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 24px;
}
.guide-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}
.guide-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--green-200);
  transform: translateY(-4px);
}
.guide-card-icon { font-size: 2rem; margin-bottom: 14px; }
.guide-card h4 {
  font-family:var(--font-serif);
  font-size:1rem;
  margin-bottom:10px;
  color:var(--gray-800);
}
.guide-card p {
  font-size:13px;
  color:var(--gray-600);
  line-height:1.75;
}
.guide-card ul {
  list-style: none;
  margin-top:10px;
}
.guide-card ul li {
  font-size:13px;
  color:var(--gray-600);
  padding:3px 0;
  padding-left:14px;
  position:relative;
  line-height:1.6;
}
.guide-card ul li::before {
  content:'•';
  position:absolute; left:0;
  color:var(--green-500);
}

/* 景点卡片列表 */
.spots-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 20px;
}
.spot-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--gray-200);
  transition: var(--transition);
  cursor: pointer;
}
.spot-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.spot-card-img {
  height: 140px;
  position: relative;
  overflow: hidden;
}
.spot-card-body { padding: 16px; }
.spot-card-body h5 {
  font-family: var(--font-serif);
  font-size:.95rem;
  margin-bottom:6px;
}
.spot-card-body p {
  font-size:12px;
  color:var(--gray-400);
  line-height:1.6;
}
.spot-rating {
  font-size:12px;
  color:var(--gold);
  margin-top:6px;
}

/* section spacing */
.content-section { padding: 80px 0; }
.content-section.alt { background: var(--gray-50); }
.content-section h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  margin-bottom: 8px;
  color: var(--gray-800);
}
.content-section .section-lead {
  font-size:15px; color:var(--gray-400); line-height:1.7;
  margin-bottom:40px;
}

/* 信息高亮块 */
.info-box {
  background: linear-gradient(135deg, var(--green-50), var(--sky-100));
  border-left: 4px solid var(--green-400);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin: 28px 0;
}
.info-box strong { color: var(--green-700); }
.info-box p { font-size:14px; color:var(--gray-600); line-height:1.7; margin:0; }

/* 路线总览横幅 */
.route-banner {
  background: linear-gradient(135deg, #1b4332, #2d6a4f);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.route-banner h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--white);
  margin-bottom: 8px;
}
.route-banner p {
  font-size:14px;
  color:rgba(255,255,255,.75);
  line-height:1.7;
}
.route-stats {
  display:flex; gap:36px; flex-shrink:0;
}
.route-stat { text-align:center; }
.route-stat strong {
  display:block;
  font-size:1.8rem;
  color:var(--gold);
  font-weight:700;
}
.route-stat span { font-size:12px; color:rgba(255,255,255,.6); }

@media(max-width:768px) {
  .guide-grid { grid-template-columns: 1fr; }
  .spots-grid { grid-template-columns: 1fr 1fr; }
  .route-banner { flex-direction:column; padding:28px 24px; }
  .page-hero-content { padding: 0 24px 36px; }
}
@media(max-width:480px) {
  .spots-grid { grid-template-columns: 1fr; }
}