/* ==========================================================================
   机场 TOP1 - 编辑型暖白/米色资料与独立博客设计系统
   自然留白、质感排版、低饱和砖红/棕橙强调色、舒适可信
   ========================================================================== */

:root {
    /* 暖白 / 米白色页面底色与面板 */
    --bg-dark: #FAF8F5;           /* 暖白/米色页面背景 */
    --bg-card: #FFFFFF;           /* 内容面板 / 卡片纯白 */
    --bg-card-hover: #F4F1EA;     /* 悬停暖灰提亮 */
    --bg-header: #FFFFFF;         /* 顶部白色导航栏背景 */
    --border-color: #E5E2DC;       /* 细灰色分隔线 */
    --border-highlight: #C85A32;   /* 砖红/棕橙高亮边框 */

    /* 编辑型高对比度文字层级 */
    --text-main: #2C2C2C;         /* 主正文字体（深灰接近黑） */
    --text-heading: #1A1A1A;      /* 标题字体（墨黑） */
    --text-muted: #666666;        /* 次要描述字体（中灰） */
    --text-dim: #8C8C8C;          /* 辅助提示字体（浅灰） */

    /* 强调色：低饱和砖红 / 棕橙色 */
    --primary-cyan: #C85A32;      /* 链接 / 当前导航 / 主强调 */
    --primary-blue: #C85A32;      /* 主操作按钮背景 */
    --accent-green: #2E7D32;      /* 低饱和深绿 */
    --accent-red: #D9381E;        /* 低饱和预警红 */

    /* 统一无渐变 */
    --gradient-brand: #C85A32;
    --gradient-danger: #D9381E;

    /* 严禁发光、外阴影与彩色发光描边 */
    --shadow-glass: 0 1px 3px rgba(0, 0, 0, 0.03);
    --shadow-glow: none;
    --backdrop-blur: none;

    /* 统一圆角：6px - 8px */
    --radius-sm: 6px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-full: 6px;

    /* 人文编辑型字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "WenQuanYi Micro Hei", sans-serif;
    --font-heading: var(--font-sans);
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

    --transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 顶部提醒条（朴素质感） */
.top-alert-bar {
    background: #F4F1EA;
    color: var(--text-main);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 8px 16px;
    position: relative;
    z-index: 1000;
}

.alert-content {
    max-width: 1180px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.alert-badge {
    background: #EAE6DF;
    color: var(--primary-cyan);
    border: 1px solid var(--border-color);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    white-space: nowrap;
}

.alert-text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-muted);
}

.alert-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.1rem;
    cursor: pointer;
    line-height: 1;
}

.alert-close:hover {
    color: var(--text-heading);
}

/* 顶部白色导航 Header (高度 64-68px，底部细灰线) */
.site-header {
    position: sticky;
    top: 0;
    z-index: 900;
    background: var(--bg-header);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.header-container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
    height: 66px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
}

.logo-icon {
    width: 28px;
    height: 28px;
    border-radius: 4px;
    background: #F4F1EA;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-cyan);
    font-size: 0.95rem;
}

.brand-name {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-heading);
    display: block;
    line-height: 1.1;
    letter-spacing: -0.01em;
}

.brand-accent {
    color: var(--primary-cyan);
    margin-left: 2px;
}

.brand-tagline {
    display: none;
}

/* 主导航项：普通文字导航 */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 4px;
}

.nav-item {
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    user-select: none;
    border-bottom: 2px solid transparent;
}

.nav-item i {
    display: none !important;
}

.nav-item:hover {
    color: var(--text-heading);
    background: rgba(0, 0, 0, 0.03);
}

.nav-item.active {
    color: var(--primary-cyan);
    background: transparent;
    border-bottom: 2px solid var(--primary-cyan);
    border-radius: 0;
    font-weight: 600;
}

.nav-item.text-danger {
    color: var(--accent-red);
}

.nav-item.text-danger.active {
    color: var(--accent-red);
    border-bottom: 2px solid var(--accent-red);
    background: transparent;
}

.nav-link-subtle {
    color: var(--text-muted);
    font-size: 0.88rem;
    text-decoration: none;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--transition);
}

.nav-link-subtle:hover {
    color: var(--primary-cyan);
}

/* 搜索框 (次要不抢眼) */
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-box {
    position: relative;
    width: 150px;
    transition: var(--transition);
}

.search-box:focus-within {
    width: 200px;
}

.search-icon {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-dim);
    font-size: 0.8rem;
}

.search-box input {
    width: 100%;
    padding: 5px 10px 5px 30px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: #F4F1EA;
    color: var(--text-main);
    font-size: 0.82rem;
    outline: none;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--primary-cyan);
    background: #FFFFFF;
}

.theme-toggle {
    display: none !important;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 1.1rem;
    width: 34px;
    height: 34px;
    border-radius: 6px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

/* Mobile Nav Drawer */
.mobile-nav-drawer {
    display: none;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 24px;
}

.mobile-nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mobile-nav-list li {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-main);
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
}

.mobile-nav-list li i {
    display: none;
}

/* Main Content Layout (1180px 居中大面积留白) */
.main-content {
    flex: 1;
    max-width: 1180px;
    width: 100%;
    margin: 0 auto;
    padding: 32px 24px 70px;
}

.view-section {
    display: none;
}

.view-section.active {
    display: block;
}

/* 页面统一标题区 */
.page-title-box {
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.page-title-box h1 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--text-heading);
    display: flex;
    align-items: center;
    gap: 10px;
}

.page-title-box h1 i {
    display: none; /* 移除大图标 */
}

.page-title-box p {
    font-size: 0.92rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.page-title-box.border-red {
    border-bottom-color: var(--accent-red);
}

/* 朴素 Hero Banner */
.hero-banner {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 32px 36px;
    margin-bottom: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}

.hero-body {
    max-width: 850px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #F4F1EA;
    color: var(--primary-cyan);
    border: 1px solid var(--border-color);
    padding: 3px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 14px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-heading);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.gradient-text {
    color: var(--primary-cyan);
    background: none;
    -webkit-text-fill-color: initial;
}

.hero-subtitle {
    font-size: 0.98rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}

.hero-stats {
    display: flex;
    gap: 32px;
    margin-bottom: 20px;
    padding: 12px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

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

.stat-num {
    font-family: var(--font-mono);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-cyan);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-dim);
}

.hero-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* 按钮规范 (低饱和砖红 / 灰框次要) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    outline: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-blue);
    color: #ffffff !important;
    border-color: transparent;
}

.btn-primary:hover {
    background: #B34E2B;
}

.btn-glass, .btn-secondary {
    background: #F4F1EA;
    color: var(--text-main) !important;
    border: 1px solid var(--border-color);
}

.btn-glass:hover, .btn-secondary:hover {
    background: #EAE6DF;
    border-color: #C5C2BC;
}

.btn-gold {
    background: #F4F1EA;
    color: var(--primary-cyan) !important;
    border: 1px solid var(--border-color);
}

.btn-gold:hover {
    background: #EAE6DF;
    border-color: var(--primary-cyan);
}

.btn-sm {
    padding: 5px 10px;
    font-size: 0.82rem;
}

.btn-lg {
    padding: 10px 20px;
    font-size: 0.95rem;
}

.btn-block {
    width: 100%;
}

/* 强力主推卡片 */
.flagship-spotlight-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin: 20px 0 28px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}

.spotlight-badge-ribbon {
    background: #F4F1EA;
    color: var(--primary-cyan);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 4px 14px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border-bottom-right-radius: 6px;
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.spotlight-content {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    flex-wrap: wrap;
}

.spotlight-left {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
    min-width: 300px;
}

.spotlight-logo-wrapper {
    position: relative;
    flex-shrink: 0;
}

.spotlight-logo {
    width: 56px;
    height: 56px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    object-fit: cover;
}

.spotlight-rank {
    position: absolute;
    bottom: -4px;
    right: -4px;
    background: #F4F1EA;
    color: var(--primary-cyan);
    border: 1px solid var(--border-color);
    font-size: 0.7rem;
    font-weight: 600;
    padding: 1px 5px;
    border-radius: 4px;
}

.spotlight-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-heading);
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 4px;
}

.spotlight-tag, .spotlight-tag.gold, .spotlight-tag.cyan {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 4px;
    background: #F4F1EA;
    color: var(--primary-cyan);
    border: 1px solid var(--border-color);
    font-weight: 500;
}

.spotlight-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 8px;
}

.spotlight-highlights {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    font-size: 0.82rem;
    color: var(--text-dim);
}

.spotlight-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 10px;
    min-width: 250px;
}

.spotlight-price-box {
    text-align: right;
}

.price-label {
    font-size: 0.78rem;
    color: var(--text-dim);
}

.price-val {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.price-val .currency {
    color: var(--primary-cyan);
    font-size: 1rem;
    font-weight: 600;
}

.price-val .amount {
    color: var(--text-heading);
    font-size: 1.8rem;
    font-weight: 700;
    font-family: var(--font-mono);
    line-height: 1;
}

.price-val .unit {
    color: var(--text-muted);
    font-size: 0.82rem;
}

.price-original {
    font-size: 0.8rem;
    color: var(--text-dim);
    text-decoration: line-through;
    margin-left: 6px;
}

.spotlight-coupon-box {
    background: #FAF7F2;
    border: 1px dashed var(--border-color);
    border-radius: 6px;
    padding: 6px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    cursor: pointer;
    width: 100%;
}

.spotlight-coupon-box .coupon-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.spotlight-coupon-box .coupon-code {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary-cyan);
}

.spotlight-actions {
    display: flex;
    gap: 8px;
    width: 100%;
}

.spotlight-btn-glow {
    background: var(--primary-blue) !important;
    color: #ffffff !important;
    border: none !important;
    box-shadow: none !important;
    border-radius: 6px;
    font-weight: 500 !important;
    flex: 1;
    text-align: center;
}

.spotlight-btn-glow:hover {
    background: #B34E2B !important;
}

/* 分类索引矩阵 */
.quick-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.category-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 18px;
    cursor: pointer;
    transition: var(--transition);
}

.category-card:hover {
    border-color: #C5C2BC;
    background: var(--bg-card-hover);
}

.card-icon {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    margin-bottom: 10px;
    background: #F4F1EA;
    color: var(--primary-cyan);
}

.category-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 4px;
}

.category-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* 朴素机场列表卡片 */
.airport-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
    gap: 16px;
}

.airport-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
    position: relative;
}

.airport-card:hover {
    border-color: #C5C2BC;
}

/* 优惠码条 */
.coupon-highlight-bar {
    background: #FAF7F2;
    border: 1px dashed var(--border-color);
    border-radius: 6px;
    padding: 6px 12px;
    margin: 10px 0 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: var(--transition);
}

.coupon-highlight-bar:hover {
    border-color: var(--primary-cyan);
}

.coupon-tag-badge {
    background: #F4F1EA;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    font-size: 0.72rem;
    font-weight: 500;
    padding: 2px 6px;
    border-radius: 4px;
}

.coupon-code-val {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--primary-cyan);
}

/* 规格明细 */
.ap-specs {
    background: #FAF7F2;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px 10px;
    margin-bottom: 14px;
    font-size: 0.8rem;
}

.spec-item span {
    color: var(--text-dim);
    display: block;
    font-size: 0.72rem;
}

.spec-item strong {
    color: var(--text-main);
    font-weight: 600;
}

.ap-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.tag-chip {
    background: #F4F1EA;
    color: #4A4A4A;
    border: 1px solid #E2DFD7;
    font-size: 0.72rem;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 500;
}

.ap-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.ap-price .price-num {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-heading);
}

.ap-price .price-unit {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* 表格样式 */
.directory-table-wrapper, .compare-table-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow-x: auto;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}

.directory-table, .compare-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.88rem;
}

.directory-table th, .compare-table th {
    background: #F4F1EA;
    color: var(--text-heading);
    font-weight: 600;
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-color);
}

.directory-table td, .compare-table td {
    padding: 12px 14px;
    border-bottom: 1px solid #E5E2DC;
    color: var(--text-main);
}

.row-highlight-cyan, .row-highlight-gold {
    background: rgba(200, 90, 50, 0.04) !important;
}

/* 博客文章纵向阅读流 (3:1 比例) */
.reviews-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 28px;
}

.reviews-main {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.review-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px 24px;
    transition: var(--transition);
}

.review-card:hover {
    border-color: #C5C2BC;
}

.rev-title {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-heading);
    line-height: 1.4;
}

.rev-meta {
    display: flex;
    gap: 12px;
    font-size: 0.78rem;
    color: var(--text-dim);
    margin-top: 6px;
}

.rev-summary {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-top: 10px;
}

.sidebar-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 18px;
    margin-bottom: 16px;
}

.sidebar-box h3 {
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* 筛选栏 */
.filter-toolbar {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 14px 18px;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.filter-label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
    min-width: 75px;
}

.filter-chip {
    background: #F4F1EA;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-chip:hover {
    border-color: #C5C2BC;
    color: var(--text-heading);
}

.filter-chip.active {
    background: #EAE6DF;
    color: var(--primary-cyan);
    border-color: var(--primary-cyan);
    font-weight: 600;
}

/* 跑路黑榜卡片 (低饱和暗红色) */
.blackhole-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-red);
    border-radius: 8px;
    padding: 18px;
    margin-bottom: 14px;
}

.bh-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.bh-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-heading);
}

.bh-status {
    background: rgba(217, 56, 30, 0.08);
    color: var(--accent-red);
    border: 1px solid rgba(217, 56, 30, 0.2);
    font-size: 0.72rem;
    font-weight: 500;
    padding: 2px 6px;
    border-radius: 4px;
}

/* FAQ 手风琴块 */
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px 20px;
}

.faq-item summary {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-heading);
}

/* 删除底部悬浮吸睛广告条 */
.floating-huanqiu-bar {
    display: none !important;
}

/* Toast 通知 */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    background: #FFFFFF;
    color: var(--text-heading);
    border: 1px solid var(--border-color);
    padding: 10px 16px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Modal 弹窗 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    max-width: 800px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    padding: 32px;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.4rem;
    cursor: pointer;
}

.modal-close:hover {
    color: var(--text-heading);
}

/* Footer 页脚 */
.site-footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: 40px 0 24px;
    margin-top: 60px;
}

.footer-container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 40px;
}

.footer-brand p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-top: 10px;
    line-height: 1.6;
}

.footer-links h4, .footer-contact h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 12px;
}

.footer-links ul {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.footer-links li {
    font-size: 0.85rem;
    color: var(--text-muted);
    cursor: pointer;
}

.footer-links li:hover {
    color: var(--primary-cyan);
}

.footer-contact p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.copyright {
    margin-top: 16px;
    font-size: 0.78rem;
    color: var(--text-dim);
}

/* Responsive Rules */
@media (max-width: 992px) {
    .main-nav { display: none; }
    .mobile-menu-btn { display: flex; }
    .reviews-layout { grid-template-columns: 1fr; }
    .footer-container { grid-template-columns: 1fr; gap: 24px; }
    .hero-title { font-size: 1.5rem; }
    .hero-banner { padding: 24px 20px; }
}
/* ==========================================================================
   协议知识与软件指引重构样式
   ========================================================================== */

/* 协议快速导航 */
.proto-quick-nav {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 28px;
}

.proto-nav-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.proto-nav-btn:hover {
    border-color: #C5C2BC;
    color: var(--text-heading);
}

.proto-nav-btn.active {
    background: transparent;
    color: var(--primary-cyan);
    border-color: var(--primary-cyan);
    font-weight: 600;
}

/* 协议知识卡片 2 列布局 */
.protocol-cards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

@media (max-width: 768px) {
    .protocol-cards-grid {
        grid-template-columns: 1fr;
    }
}

.protocol-card-std {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 22px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
}

.protocol-card-std:hover {
    border-color: #C5C2BC;
}

.proto-std-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 4px;
}

.proto-std-position {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 16px;
    line-height: 1.5;
}

.proto-fields-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    background: #FAF7F2;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px 14px;
    margin-bottom: 16px;
    font-size: 0.85rem;
}

.proto-field-item {
    line-height: 1.5;
    color: var(--text-main);
}

.proto-field-item strong {
    color: var(--text-heading);
    font-weight: 600;
    margin-right: 4px;
}

.proto-detail-link {
    font-size: 0.88rem;
    color: var(--primary-cyan);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    align-self: flex-start;
}

.proto-detail-link:hover {
    text-decoration: underline;
}

/* 协议选择建议卡片 3 列布局 */
.proto-choice-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

@media (max-width: 850px) {
    .proto-choice-grid {
        grid-template-columns: 1fr;
    }
}

.proto-choice-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.proto-choice-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 8px;
}

.proto-choice-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 12px;
}

.choice-tag {
    font-size: 0.82rem;
    color: var(--primary-cyan);
    font-weight: 600;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
}

/* 客户端推荐 4 列布局 */
.client-grid-4col {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

@media (max-width: 1024px) {
    .client-grid-4col {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .client-grid-4col {
        grid-template-columns: 1fr;
    }
}

.client-card-std {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
}

.client-card-std:hover {
    border-color: #C5C2BC;
}

.client-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.client-platform-icon {
    font-size: 1.3rem;
    color: var(--primary-cyan);
}

.client-card-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-heading);
}

.client-apps-list {
    font-size: 0.88rem;
    color: var(--text-heading);
    margin-bottom: 8px;
    line-height: 1.5;
}

.client-desc {
    font-size: 0.84rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 14px;
}

.client-link {
    font-size: 0.85rem;
    color: var(--primary-cyan);
    font-weight: 600;
    text-decoration: none;
}

.client-link:hover {
    text-decoration: underline;
}

/* 低调使用前说明页脚块 */
.notice-footer-block {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    margin-top: 32px;
}

.notice-footer-block h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 12px;
}

.notice-footer-block p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 6px;
}