/* ============================================================
   骰子结果声明
   维度1: 布局架构 D12=12 → 径向聚焦（中心CTA+四周信息放射）
   维度2: 导航形态 D8=4  → 底部浮动导航（桌面端tab栏）
   维度3: 模块库 D30     → [1]Hero视频幕布 [2]信任滚动条 [23]生成艺术 [24]时间胶囊 [28]滚动进度环
   维度4: 排版暴力 D8=3  → 纵向标题（vertical-rl装饰h2）
   维度5: 交互哲学 D8=7  → 粒子系统（Canvas pointer-events:none）
   维度6: 视觉质感 D8=2  → 新拟态（双阴影凹凸，纯色）
   维度7: 留白密度 D8=3  → 紧凑信息（3vh报纸密度，grid-gap紧凑）
   维度8: 动效触发 D8=1  → 入场即现（load动画，首屏外不delay）
   彩蛋: E6 声波反馈（圆环波纹扩散交互确认感）
   ============================================================ */

/* ---------- CSS变量：夕阳色主题系统 ---------- */
:root {
    /* 核心夕阳色板 */
    --sunset-primary: #FF8A65;
    --sunset-primary-dark: #FF7043;
    --sunset-primary-light: #FFAB91;
    --sunset-primary-pale: #FFCCBC;
    --sunset-accent: #BF360C;
    --sunset-warm: #D84315;
    --sunset-gold: #FFB74D;

    /* 背景系 */
    --bg-base: #FFF3E0;
    --bg-card: #FFF8F0;
    --bg-section: #FFE8D6;
    --bg-dark: #3E2723;
    --bg-neumorph: #FFF3E0;

    /* 文字系 */
    --text-primary: #3E2723;
    --text-secondary: #5D4037;
    --text-muted: #8D6E63;
    --text-light: #FFFFFF;
    --text-gold: #E65100;

    /* 新拟态阴影 */
    --shadow-light: #FFFFFF;
    --shadow-dark: #E0C8B0;
    --neumorph-pressed: inset 6px 6px 12px var(--shadow-dark), inset -6px -6px 12px var(--shadow-light);
    --neumorph-raised: 8px 8px 16px var(--shadow-dark), -8px -8px 16px var(--shadow-light);
    --neumorph-soft: 4px 4px 8px var(--shadow-dark), -4px -4px 8px var(--shadow-light);

    /* 辅助 */
    --border-radius: 20px;
    --border-radius-lg: 32px;
    --border-radius-sm: 12px;
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* 紧凑密度变量 */
    --section-gap: 3vh;
    --card-gap: 12px;
    --content-gap: 8px;
}

/* ---------- 全局重置与基础 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; transition: var(--transition-base); }

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

ul, ol { list-style: none; }

/* ---------- 入场即现动画 ---------- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to   { opacity: 1; transform: translateX(0); }
}
@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(30px); }
    to   { opacity: 1; transform: translateX(0); }
}
@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.92); }
    to   { opacity: 1; transform: scale(1); }
}
@keyframes rippleEffect {
    0%   { transform: scale(0); opacity: 0.6; }
    100% { transform: scale(4); opacity: 0; }
}
@keyframes scrollPulse {
    0%, 100% { transform: scale(1); }
    50%      { transform: scale(1.05); }
}
@keyframes floatY {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-8px); }
}
@keyframes shimmer {
    0%   { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}
@keyframes heroTextReveal {
    from { clip-path: inset(0 100% 0 0); }
    to   { clip-path: inset(0 0 0 0); }
}

.anim-fadeInUp    { animation: fadeInUp 0.6s ease forwards; }
.anim-fadeInLeft  { animation: fadeInLeft 0.6s ease forwards; }
.anim-fadeInRight { animation: fadeInRight 0.6s ease forwards; }
.anim-fadeInScale { animation: fadeInScale 0.5s ease forwards; }
.anim-delay-1 { animation-delay: 0.1s; opacity: 0; }
.anim-delay-2 { animation-delay: 0.2s; opacity: 0; }
.anim-delay-3 { animation-delay: 0.3s; opacity: 0; }
.anim-delay-4 { animation-delay: 0.4s; opacity: 0; }
.anim-delay-5 { animation-delay: 0.5s; opacity: 0; }

/* ---------- 滚动进度环 ---------- */
.yb-progress-ring {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 56px;
    height: 56px;
    z-index: 1050;
    pointer-events: none;
}
.yb-progress-ring svg { transform: rotate(-90deg); }
.yb-progress-ring-circle {
    fill: none;
    stroke: var(--sunset-primary-pale);
    stroke-width: 4;
}
.yb-progress-ring-bar {
    fill: none;
    stroke: var(--sunset-primary);
    stroke-width: 4;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.1s linear;
}
.yb-progress-ring-percent {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 11px;
    font-weight: 700;
    color: var(--sunset-accent);
}

/* ---------- 粒子系统Canvas ---------- */
#ybParticleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ---------- 新拟态基础组件 ---------- */
.yb-neu-card {
    background: var(--bg-neumorph);
    border-radius: var(--border-radius);
    box-shadow: var(--neumorph-raised);
    padding: 24px;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}
.yb-neu-card:hover {
    box-shadow: var(--neumorph-soft);
    transform: translateY(-2px);
}
.yb-neu-card-pressed {
    background: var(--bg-neumorph);
    border-radius: var(--border-radius);
    box-shadow: var(--neumorph-pressed);
    padding: 24px;
}
.yb-neu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    border: none;
    background: var(--bg-neumorph);
    box-shadow: var(--neumorph-raised);
    color: var(--sunset-accent);
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}
.yb-neu-btn:hover {
    box-shadow: var(--neumorph-soft);
    color: var(--sunset-primary-dark);
    transform: translateY(-2px);
}
.yb-neu-btn:active {
    box-shadow: var(--neumorph-pressed);
    transform: translateY(0);
}
.yb-neu-btn-primary {
    background: linear-gradient(135deg, var(--sunset-primary) 0%, var(--sunset-primary-dark) 100%);
    color: var(--text-light);
    box-shadow: 0 6px 20px rgba(255, 112, 67, 0.35);
}
.yb-neu-btn-primary:hover {
    box-shadow: 0 8px 28px rgba(255, 112, 67, 0.45);
    color: var(--text-light);
    filter: brightness(1.08);
}

/* 声波反馈涟漪 */
.yb-ripple-btn {
    position: relative;
    overflow: hidden;
}
.yb-ripple-btn .ripple-span {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    animation: rippleEffect 0.7s ease-out forwards;
    pointer-events: none;
}

/* ---------- 纵向标题装饰 ---------- */
.yb-vertical-title {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--sunset-primary-pale);
    letter-spacing: 0.15em;
    line-height: 1.2;
    user-select: none;
    position: absolute;
}

/* ---------- 头部区域 ---------- */
.yb-header {
    position: sticky;
    top: 0;
    z-index: 1030;
    background: rgba(255, 243, 224, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--sunset-primary-pale);
    padding: 10px 0;
    transition: var(--transition-base);
}
.yb-header-scrolled {
    padding: 6px 0;
    box-shadow: 0 4px 20px rgba(191, 54, 12, 0.08);
}
.yb-header .navbar-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--sunset-accent);
    display: flex;
    align-items: center;
    gap: 10px;
}
.yb-header .navbar-brand i {
    font-size: 1.8rem;
    color: var(--sunset-primary-dark);
}
.yb-header .nav-link {
    font-weight: 600;
    color: var(--text-secondary);
    padding: 8px 16px !important;
    border-radius: 50px;
    transition: var(--transition-base);
    font-size: 0.95rem;
}
.yb-header .nav-link:hover,
.yb-header .nav-link.active {
    color: var(--sunset-accent);
    background: var(--sunset-primary-pale);
}
.yb-header .navbar-toggler {
    border: none;
    box-shadow: var(--neumorph-soft);
    border-radius: var(--border-radius-sm);
    padding: 8px 12px;
}
.yb-header .navbar-toggler:focus { box-shadow: var(--neumorph-pressed); }

/* 顶部信息条 */
.yb-topbar {
    background: linear-gradient(90deg, var(--sunset-accent) 0%, var(--sunset-warm) 100%);
    color: var(--text-light);
    padding: 6px 0;
    font-size: 0.85rem;
}
.yb-topbar a { color: var(--sunset-gold); font-weight: 600; }
.yb-topbar i { margin-right: 4px; }

/* ---------- 底部浮动导航（移动端适配） ---------- */
.yb-float-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1040;
    background: rgba(255, 243, 224, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 -4px 24px rgba(191, 54, 12, 0.1);
    border-top: 1px solid var(--sunset-primary-pale);
    padding: 8px 0;
    display: none;
}
.yb-float-nav .yb-float-item {
    flex: 1;
    text-align: center;
    padding: 6px 2px;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-base);
    color: var(--text-muted);
    font-size: 0.7rem;
    font-weight: 600;
}
.yb-float-nav .yb-float-item i {
    display: block;
    font-size: 1.3rem;
    margin-bottom: 2px;
}
.yb-float-nav .yb-float-item.active,
.yb-float-nav .yb-float-item:hover {
    color: var(--sunset-accent);
    background: var(--sunset-primary-pale);
}

/* ---------- 公共底部 ---------- */
.yb-footer {
    background: var(--bg-dark);
    color: var(--sunset-primary-pale);
    padding: 48px 0 24px;
    position: relative;
    overflow: hidden;
}
.yb-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--sunset-primary), var(--sunset-gold), var(--sunset-primary));
}
.yb-footer-brand {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--sunset-primary-light);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.yb-footer-brand i { font-size: 1.6rem; color: var(--sunset-primary); }
.yb-footer-desc { color: var(--sunset-primary-pale); font-size: 0.9rem; line-height: 1.7; margin-bottom: 20px; }
.yb-footer-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--sunset-gold);
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 8px;
}
.yb-footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 36px;
    height: 3px;
    background: var(--sunset-primary);
    border-radius: 2px;
}
.yb-footer-links li { margin-bottom: 10px; }
.yb-footer-links a {
    color: var(--sunset-primary-pale);
    font-size: 0.9rem;
    transition: var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.yb-footer-links a:hover { color: var(--sunset-gold); padding-left: 6px; }
.yb-footer-links a i { font-size: 0.75rem; }
.yb-footer-contact li {
    margin-bottom: 12px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.9rem;
}
.yb-footer-contact li i {
    color: var(--sunset-primary);
    font-size: 1.1rem;
    margin-top: 2px;
    flex-shrink: 0;
}
.yb-footer-bottom {
    border-top: 1px solid rgba(255, 138, 101, 0.2);
    margin-top: 36px;
    padding-top: 20px;
    text-align: center;
    font-size: 0.82rem;
    color: var(--sunset-primary-pale);
}
.yb-footer-bottom a { color: var(--sunset-gold); }

/* 友情链接 */
.yb-friend-link {
    display: inline-block;
    padding: 5px 14px;
    margin: 4px;
    background: rgba(255, 138, 101, 0.12);
    border-radius: 50px;
    font-size: 0.82rem;
    color: var(--sunset-primary-pale);
    transition: var(--transition-base);
    border: 1px solid rgba(255, 138, 101, 0.2);
}
.yb-friend-link:hover {
    background: var(--sunset-primary);
    color: var(--text-light);
    border-color: var(--sunset-primary);
}

/* ---------- 首页 Hero 区域（径向聚焦+视频幕布） ---------- */
.yb-hero {
    position: relative;
    min-height: 92vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: radial-gradient(ellipse at center, var(--bg-card) 0%, var(--bg-base) 50%, var(--sunset-primary-pale) 100%);
}
.yb-hero-video-wrap {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}
.yb-hero-video-wrap video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.25;
}
.yb-hero-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, transparent 0%, rgba(255, 243, 224, 0.85) 70%);
    z-index: 1;
}
.yb-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: 0 20px;
}
.yb-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--bg-neumorph);
    box-shadow: var(--neumorph-soft);
    border-radius: 50px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--sunset-accent);
    margin-bottom: 24px;
    animation: fadeInUp 0.5s ease forwards;
}
.yb-hero-badge i { color: var(--sunset-primary-dark); }
.yb-hero h1 {
    font-size: clamp(2rem, 5vw, 3.6rem);
    font-weight: 900;
    color: var(--text-primary);
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
    animation: fadeInUp 0.6s ease 0.1s forwards;
    opacity: 0;
}
.yb-hero h1 span {
    background: linear-gradient(135deg, var(--sunset-primary-dark) 0%, var(--sunset-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.yb-hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.6s ease 0.2s forwards;
    opacity: 0;
}
.yb-hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease 0.3s forwards;
    opacity: 0;
}
.yb-hero-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 48px;
    animation: fadeInUp 0.6s ease 0.4s forwards;
    opacity: 0;
}
.yb-hero-stat {
    text-align: center;
}
.yb-hero-stat-num {
    font-size: 2rem;
    font-weight: 900;
    color: var(--sunset-accent);
    line-height: 1;
}
.yb-hero-stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 6px;
    font-weight: 500;
}

/* 径向聚焦装饰圈 */
.yb-radial-ring {
    position: absolute;
    border-radius: 50%;
    border: 2px solid var(--sunset-primary-pale);
    opacity: 0.25;
    animation: scrollPulse 4s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}
.yb-radial-ring-1 { width: 300px; height: 300px; top: 10%; left: 5%; animation-delay: 0s; }
.yb-radial-ring-2 { width: 200px; height: 200px; bottom: 15%; right: 8%; animation-delay: 1.5s; }
.yb-radial-ring-3 { width: 160px; height: 160px; top: 50%; left: 80%; animation-delay: 0.8s; }

/* ---------- 服务优势卡片（紧凑密度） ---------- */
.yb-section { padding: var(--section-gap) 0; position: relative; }
.yb-section-title {
    font-size: clamp(1.5rem, 3.5vw, 2.2rem);
    font-weight: 800;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 8px;
    position: relative;
}
.yb-section-title span {
    background: linear-gradient(135deg, var(--sunset-primary-dark), var(--sunset-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.yb-section-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 28px;
}
.yb-service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--card-gap);
}
.yb-service-card {
    background: var(--bg-neumorph);
    border-radius: var(--border-radius);
    box-shadow: var(--neumorph-raised);
    padding: 24px 20px;
    text-align: center;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}
.yb-service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--sunset-primary), var(--sunset-gold));
    opacity: 0;
    transition: var(--transition-base);
}
.yb-service-card:hover::before { opacity: 1; }
.yb-service-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 32px rgba(191, 54, 12, 0.12);
}
.yb-service-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-neumorph);
    box-shadow: var(--neumorph-pressed);
    font-size: 1.6rem;
    color: var(--sunset-primary-dark);
    transition: var(--transition-base);
}
.yb-service-card:hover .yb-service-icon {
    box-shadow: var(--neumorph-raised);
    color: var(--sunset-accent);
}
.yb-service-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.yb-service-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ---------- 信任滚动条 ---------- */
.yb-trust-bar {
    background: linear-gradient(90deg, var(--sunset-primary-pale) 0%, var(--bg-card) 30%, var(--bg-card) 70%, var(--sunset-primary-pale) 100%);
    padding: 24px 0;
    overflow: hidden;
    position: relative;
    border-top: 1px solid var(--sunset-primary-pale);
    border-bottom: 1px solid var(--sunset-primary-pale);
}
.yb-trust-track {
    display: flex;
    gap: 48px;
    animation: ybTrustScroll 30s linear infinite;
    width: max-content;
}
.yb-trust-item {
    display: flex;
    align-items: center;
    gap: 10px;
    white-space: nowrap;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.92rem;
    flex-shrink: 0;
}
.yb-trust-item i {
    color: var(--sunset-primary-dark);
    font-size: 1.2rem;
}
@keyframes ybTrustScroll {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}

/* ---------- 时间胶囊（螺旋时间轴） ---------- */
.yb-timeline {
    position: relative;
    padding: 40px 0;
}
.yb-timeline-spine {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--sunset-primary), var(--sunset-gold), var(--sunset-primary));
    transform: translateX(-50%);
    border-radius: 2px;
}
.yb-timeline-item {
    position: relative;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
}
.yb-timeline-item:nth-child(odd)  { flex-direction: row; }
.yb-timeline-item:nth-child(even) { flex-direction: row-reverse; }
.yb-timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--sunset-primary);
    border-radius: 50%;
    border: 4px solid var(--bg-base);
    box-shadow: var(--neumorph-raised);
    z-index: 2;
}
.yb-timeline-content {
    width: 42%;
    background: var(--bg-neumorph);
    border-radius: var(--border-radius);
    box-shadow: var(--neumorph-raised);
    padding: 20px;
    position: relative;
    transition: var(--transition-base);
}
.yb-timeline-content:hover {
    transform: scale(1.03);
    box-shadow: var(--neumorph-soft);
}
.yb-timeline-content h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--sunset-accent);
    margin-bottom: 6px;
}
.yb-timeline-content p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}
.yb-timeline-year {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    background: var(--sunset-accent);
    color: var(--text-light);
    padding: 4px 14px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    top: -10px;
    z-index: 3;
    white-space: nowrap;
}

/* ---------- 城市目录站点模块 ---------- */
.yb-city-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 10px;
}
.yb-city-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 6px;
    background: var(--bg-neumorph);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--neumorph-soft);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: var(--transition-base);
    text-align: center;
    border: 1px solid transparent;
}
.yb-city-item:hover {
    background: var(--sunset-primary);
    color: var(--text-light);
    box-shadow: 0 4px 12px rgba(255, 112, 67, 0.35);
    border-color: var(--sunset-primary-dark);
    transform: translateY(-2px);
}
.yb-city-item i { margin-right: 4px; font-size: 0.8rem; }

/* ---------- 文章卡片 ---------- */
.yb-news-card {
    background: var(--bg-neumorph);
    border-radius: var(--border-radius);
    box-shadow: var(--neumorph-raised);
    overflow: hidden;
    transition: var(--transition-base);
    height: 100%;
    display: flex;
    flex-direction: column;
}
.yb-news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 16px 40px rgba(191, 54, 12, 0.12);
}
.yb-news-img-wrap {
    position: relative;
    padding-top: 60%;
    overflow: hidden;
    flex-shrink: 0;
}
.yb-news-img-wrap img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}
.yb-news-card:hover .yb-news-img-wrap img { transform: scale(1.08); }
.yb-news-body {
    padding: 18px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.yb-news-cat {
    display: inline-block;
    padding: 3px 10px;
    background: var(--sunset-primary-pale);
    color: var(--sunset-accent);
    border-radius: 50px;
    font-size: 0.72rem;
    font-weight: 700;
    margin-bottom: 10px;
    width: fit-content;
}
.yb-news-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.yb-news-desc {
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}
.yb-news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.78rem;
    color: var(--text-muted);
    border-top: 1px solid var(--sunset-primary-pale);
    padding-top: 10px;
    margin-top: auto;
}
.yb-news-meta i { margin-right: 3px; }

/* ---------- 文章列表页 ---------- */
.yb-list-hero {
    background: linear-gradient(135deg, var(--sunset-primary-pale) 0%, var(--bg-base) 60%);
    padding: 48px 0 36px;
    position: relative;
    overflow: hidden;
}
.yb-list-hero h1 {
    font-size: clamp(1.6rem, 4vw, 2.4rem);
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.yb-list-hero p { color: var(--text-muted); font-size: 1rem; }
.yb-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 16px;
}
.yb-breadcrumb a { color: var(--sunset-accent); font-weight: 600; }
.yb-breadcrumb i { font-size: 0.7rem; }

/* ---------- 文章详情页 ---------- */
.yb-detail-hero {
    background: linear-gradient(135deg, var(--bg-section) 0%, var(--bg-base) 100%);
    padding: 40px 0 32px;
}
.yb-detail-title {
    font-size: clamp(1.4rem, 3.5vw, 2rem);
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: 16px;
}
.yb-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}
.yb-detail-meta span { display: inline-flex; align-items: center; gap: 5px; }
.yb-detail-meta i { color: var(--sunset-primary-dark); }
.yb-detail-tags { margin-bottom: 20px; }
.yb-detail-tag {
    display: inline-block;
    padding: 4px 14px;
    margin: 4px 6px 4px 0;
    background: var(--sunset-primary-pale);
    color: var(--sunset-accent);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    transition: var(--transition-base);
}
.yb-detail-tag:hover { background: var(--sunset-primary); color: var(--text-light); }
.yb-detail-content {
    background: var(--bg-neumorph);
    border-radius: var(--border-radius);
    box-shadow: var(--neumorph-raised);
    padding: 32px;
    font-size: 1rem;
    line-height: 1.85;
    color: var(--text-primary);
}
.yb-detail-content p { margin-bottom: 16px; }
.yb-detail-content h2, .yb-detail-content h3 {
    font-weight: 700;
    color: var(--sunset-accent);
    margin: 24px 0 12px;
}
.yb-detail-content img {
    border-radius: var(--border-radius-sm);
    margin: 16px 0;
    box-shadow: var(--neumorph-soft);
    max-width: 100%;
}

/* ---------- 侧边栏 ---------- */
.yb-sidebar-card {
    background: var(--bg-neumorph);
    border-radius: var(--border-radius);
    box-shadow: var(--neumorph-raised);
    padding: 24px;
    margin-bottom: 20px;
}
.yb-sidebar-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--sunset-primary-pale);
    display: flex;
    align-items: center;
    gap: 8px;
}
.yb-sidebar-title i { color: var(--sunset-primary-dark); }
.yb-sidebar-news-item {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--sunset-primary-pale);
    transition: var(--transition-base);
}
.yb-sidebar-news-item:last-child { border-bottom: none; }
.yb-sidebar-news-item:hover { padding-left: 6px; }
.yb-sidebar-news-img {
    width: 72px;
    height: 54px;
    border-radius: var(--border-radius-sm);
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: var(--neumorph-soft);
}
.yb-sidebar-news-title {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.yb-sidebar-news-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ---------- 关于我们页 ---------- */
.yb-about-hero {
    background: linear-gradient(135deg, var(--sunset-primary-pale) 0%, var(--bg-base) 70%);
    padding: 56px 0 40px;
    position: relative;
    overflow: hidden;
    text-align: center;
}
.yb-about-hero h1 {
    font-size: clamp(1.8rem, 4.5vw, 2.8rem);
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 12px;
}
.yb-about-hero p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}
.yb-about-section {
    padding: var(--section-gap) 0;
}
.yb-about-card {
    background: var(--bg-neumorph);
    border-radius: var(--border-radius);
    box-shadow: var(--neumorph-raised);
    padding: 32px;
    height: 100%;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}
.yb-about-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(191, 54, 12, 0.1);
}
.yb-about-card .icon-box {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--bg-neumorph);
    box-shadow: var(--neumorph-pressed);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--sunset-primary-dark);
    margin-bottom: 20px;
    transition: var(--transition-base);
}
.yb-about-card:hover .icon-box {
    box-shadow: var(--neumorph-raised);
    color: var(--sunset-accent);
}
.yb-about-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}
.yb-about-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
}
.yb-stats-row {
    background: linear-gradient(135deg, var(--sunset-primary-dark) 0%, var(--sunset-warm) 100%);
    border-radius: var(--border-radius-lg);
    padding: 36px 24px;
    box-shadow: 0 12px 40px rgba(191, 54, 12, 0.2);
}
.yb-stats-row .yb-stat-item { text-align: center; color: var(--text-light); }
.yb-stats-row .yb-stat-num  { font-size: 2.2rem; font-weight: 900; display: block; }
.yb-stats-row .yb-stat-label { font-size: 0.85rem; opacity: 0.9; margin-top: 6px; }

/* ---------- 联系我们页 ---------- */
.yb-contact-hero {
    background: linear-gradient(135deg, var(--sunset-primary) 0%, var(--sunset-warm) 100%);
    padding: 56px 0 40px;
    color: var(--text-light);
    text-align: center;
    position: relative;
    overflow: hidden;
}
.yb-contact-hero h1 {
    font-size: clamp(1.8rem, 4.5vw, 2.8rem);
    font-weight: 900;
    margin-bottom: 12px;
}
.yb-contact-hero p { font-size: 1.05rem; opacity: 0.95; max-width: 560px; margin: 0 auto; }
.yb-contact-form-wrap {
    background: var(--bg-neumorph);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--neumorph-raised);
    padding: 40px;
}
.yb-form-group { margin-bottom: 20px; }
.yb-form-label {
    display: block;
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.yb-form-label .required { color: #E53935; margin-left: 2px; }
.yb-form-input {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--sunset-primary-pale);
    border-radius: var(--border-radius);
    background: var(--bg-neumorph);
    box-shadow: var(--neumorph-pressed);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition-base);
    outline: none;
}
.yb-form-input:focus {
    border-color: var(--sunset-primary);
    box-shadow: var(--neumorph-raised);
}
.yb-form-input::placeholder { color: var(--text-muted); }
.yb-contact-info-card {
    background: var(--bg-neumorph);
    border-radius: var(--border-radius);
    box-shadow: var(--neumorph-raised);
    padding: 28px;
    margin-bottom: 20px;
    text-align: center;
    transition: var(--transition-base);
}
.yb-contact-info-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(191, 54, 12, 0.1);
}
.yb-contact-info-card .info-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--sunset-primary) 0%, var(--sunset-primary-dark) 100%);
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 14px;
    box-shadow: 0 6px 16px rgba(255, 112, 67, 0.35);
}
.yb-contact-info-card h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.yb-contact-info-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}
.yb-qrcode-wrap {
    background: var(--bg-neumorph);
    border-radius: var(--border-radius);
    box-shadow: var(--neumorph-raised);
    padding: 24px;
    text-align: center;
}
.yb-qrcode-wrap img {
    max-width: 160px;
    margin: 0 auto 12px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--neumorph-soft);
}
.yb-qrcode-wrap p { font-size: 0.9rem; color: var(--text-secondary); font-weight: 600; }

/* ---------- 分页 ---------- */
.yb-pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 32px;
}
.yb-pagination .page-link {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-neumorph);
    box-shadow: var(--neumorph-soft);
    border: none;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-base);
}
.yb-pagination .page-link:hover,
.yb-pagination .page-item.active .page-link {
    background: var(--sunset-primary);
    color: var(--text-light);
    box-shadow: 0 4px 12px rgba(255, 112, 67, 0.35);
}

/* ---------- FAQ 手风琴 ---------- */
.yb-accordion-item {
    background: var(--bg-neumorph);
    border-radius: var(--border-radius);
    box-shadow: var(--neumorph-soft);
    margin-bottom: 12px;
    overflow: hidden;
    border: none;
}
.yb-accordion-btn {
    width: 100%;
    padding: 18px 24px;
    background: transparent;
    border: none;
    text-align: left;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-size: 0.95rem;
    transition: var(--transition-base);
}
.yb-accordion-btn:hover { color: var(--sunset-accent); }
.yb-accordion-btn i { transition: var(--transition-base); color: var(--sunset-primary-dark); }
.yb-accordion-btn.collapsed i { transform: rotate(-90deg); }
.yb-accordion-body {
    padding: 0 24px 18px;
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ---------- CTA 区块 ---------- */
.yb-cta-section {
    background: linear-gradient(135deg, var(--sunset-primary-dark) 0%, var(--sunset-accent) 100%);
    padding: 56px 0;
    text-align: center;
    color: var(--text-light);
    position: relative;
    overflow: hidden;
}
.yb-cta-section h2 {
    font-size: clamp(1.5rem, 3.5vw, 2.2rem);
    font-weight: 900;
    margin-bottom: 16px;
}
.yb-cta-section p { font-size: 1.05rem; opacity: 0.95; margin-bottom: 28px; max-width: 560px; margin-left: auto; margin-right: auto; }
.yb-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 40px;
    background: var(--text-light);
    color: var(--sunset-accent);
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.05rem;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    transition: var(--transition-base);
}
.yb-cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.2);
    color: var(--sunset-warm);
}

/* ---------- 步骤流程 ---------- */
.yb-step-item {
    text-align: center;
    position: relative;
    padding: 0 12px;
}
.yb-step-num {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--bg-neumorph);
    box-shadow: var(--neumorph-raised);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--sunset-primary-dark);
    margin: 0 auto 16px;
    position: relative;
    z-index: 2;
}
.yb-step-item h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.yb-step-item p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}
.yb-step-arrow {
    position: absolute;
    top: 28px;
    right: -16px;
    font-size: 1.2rem;
    color: var(--sunset-primary-pale);
    z-index: 1;
}

/* ---------- 响应式适配 ---------- */
@media (max-width: 991.98px) {
    .yb-city-grid { grid-template-columns: repeat(4, 1fr); }
    .yb-timeline-spine { left: 24px; }
    .yb-timeline-item,
    .yb-timeline-item:nth-child(odd),
    .yb-timeline-item:nth-child(even) { flex-direction: row; }
    .yb-timeline-content { width: calc(100% - 60px); margin-left: 48px; }
    .yb-timeline-dot { left: 24px; }
    .yb-timeline-year { left: 24px; transform: translateX(-50%); }
    .yb-vertical-title { display: none; }
    .yb-progress-ring { width: 44px; height: 44px; top: 12px; right: 12px; }
    .yb-float-nav { display: flex; }
    body { padding-bottom: 64px; }
    .yb-service-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
}

@media (max-width: 767.98px) {
    .yb-hero { min-height: 85vh; }
    .yb-hero-stats { gap: 20px; }
    .yb-hero-stat-num { font-size: 1.6rem; }
    .yb-city-grid { grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .yb-city-item { padding: 8px 4px; font-size: 0.78rem; }
    .yb-contact-form-wrap { padding: 24px; }
    .yb-detail-content { padding: 20px; }
    .yb-step-arrow { display: none; }
    .yb-news-desc { -webkit-line-clamp: 2; }
}

@media (max-width: 575.98px) {
    .yb-city-grid { grid-template-columns: repeat(2, 1fr); }
    .yb-service-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .yb-service-card { padding: 18px 14px; }
    .yb-service-icon { width: 52px; height: 52px; font-size: 1.3rem; }
    .yb-neu-btn { padding: 12px 24px; font-size: 0.9rem; }
    .yb-footer { padding: 36px 0 80px; }
    .yb-hero-cta { flex-direction: column; align-items: center; }
    .yb-stats-row .yb-stat-num { font-size: 1.6rem; }
}

/* ---------- 无障碍降级 ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .yb-trust-track { animation: none; }
}