:root {
    /* 暖赭 / 岩灰 / 琥珀强调 — 与此前靛紫、青绿系明显区分 */
    --primary-color: #c2410c;
    --primary-dark: #9a3412;
    --secondary-color: #1c1917;
    --accent-color: #ca8a04;
    --surface: #fafaf9;
    --surface-elevated: #ffffff;
    --surface-band: #fff7ed;
    --surface-ink: #292524;
    --text-color: #292524;
    --text-muted: #57534e;
    --border-subtle: rgba(28, 25, 23, 0.12);
    --border-inner: rgba(28, 25, 23, 0.08);
    /* 统一：结构线 1px；标题下划线 2px；左侧强调条 3px（避免 2/3/4px 混用显乱） */
    --border-rule: 1px solid var(--border-subtle);
    --border-title: 2px solid var(--secondary-color);
    --border-emphasis: 3px solid var(--primary-color);
    --border-emphasis-alt: 3px solid var(--accent-color);
    --border-on-dark: rgba(255, 255, 255, 0.12);
    --border-on-dark-inner: rgba(255, 255, 255, 0.1);
    --gray-100: #f5f5f4;
    --gray-200: #e7e5e4;
    --transition-speed: 0.25s;
    --transition-easing: cubic-bezier(0.4, 0, 0.2, 1);
    --radius-card: 6px;
    --radius-inner: 4px;
    --shadow-soft: 0 1px 0 rgba(28, 25, 23, 0.06), 0 8px 24px rgba(28, 25, 23, 0.06);
    --shadow-hover: 0 2px 0 rgba(28, 25, 23, 0.08), 0 12px 28px rgba(154, 52, 18, 0.12);
    --section-pad-y: clamp(2.5rem, 6vw, 4.25rem);
}

html {
    overflow-x: hidden;
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
    color: var(--text-color);
    line-height: 1.65;
    background: var(--surface);
    overflow-x: hidden;
    padding-left: env(safe-area-inset-left, 0);
    padding-right: env(safe-area-inset-right, 0);
}

/* Bootstrap 栅格 + 卡片 hover 位移时防止撑出视口 */
.container .row > [class*="col-"] {
    min-width: 0;
}

/* —— 导航（新版） —— */
.zd9b47navbar {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: none;
    padding: 0.65rem 0;
}

.zd9b47navbar-brand img {
    height: 44px;
}

.zd9b47nav-link {
    color: var(--text-color) !important;
    font-weight: 500;
    padding: 0.5rem 0.85rem !important;
    border-radius: 0.5rem;
    transition: color var(--transition-speed), background var(--transition-speed);
    white-space: normal;
    word-break: break-word;
}

.zd9b47nav-link:hover {
    color: var(--primary-color) !important;
    background: rgba(194, 65, 12, 0.08);
}

/* —— 英雄区：浅色编辑风 + 侧标轨 —— */
.zd9b47display-serif {
    font-family: Georgia, "Songti SC", "Noto Serif SC", "Times New Roman", serif;
    letter-spacing: -0.03em;
}

.zd9b47hero-section {
    background: var(--surface);
    color: var(--secondary-color);
    padding: clamp(3.25rem, 8vw, 5.5rem) 0 clamp(2.5rem, 6vw, 4rem);
    position: relative;
    border-bottom: var(--border-rule);
    overflow-x: clip;
}

.zd9b47hero-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: linear-gradient(90deg, rgba(194, 65, 12, 0.04) 1px, transparent 1px);
    background-size: 28px 100%;
    opacity: 0.5;
    pointer-events: none;
}

.zd9b47hero-section::after {
    display: none;
}

.zd9b47hero-copy {
    position: relative;
    z-index: 1;
    border-left: var(--border-emphasis);
    padding-left: clamp(1rem, 3vw, 1.75rem);
    min-width: 0;
}

.zd9b47hero-rail {
    width: 3.25rem;
    flex-shrink: 0;
    border-right: var(--border-rule);
    padding-top: 0.25rem;
    gap: 1.75rem;
    align-items: center;
}

.zd9b47hero-rail__n {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    writing-mode: vertical-rl;
    transform: rotate(180deg);
}

.zd9b47hero-rail__line {
    flex: 1;
    width: 1px;
    background: linear-gradient(180deg, var(--primary-color), transparent);
    min-height: 4rem;
    margin: 0.5rem 0;
}

.zd9b47hero-eyebrow {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--primary-color);
    margin-bottom: 0.65rem;
}

.zd9b47hero-title {
    font-size: clamp(2rem, 5vw, 3.35rem);
    font-weight: 700;
    margin-bottom: 0.85rem;
    line-height: 1.08;
    color: var(--secondary-color);
}

.zd9b47hero-lead {
    font-size: clamp(1.02rem, 2.1vw, 1.2rem);
    color: var(--text-muted);
    margin-bottom: 1rem;
    max-width: 38rem;
    line-height: 1.55;
}

.zd9b47hero-note {
    font-size: 0.9rem;
    color: var(--text-muted);
    max-width: 40rem;
    line-height: 1.65;
    margin-bottom: 0;
}

.zd9b47hero-tags {
    list-style: none;
    padding: 0;
    margin: 1.25rem 0 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 0.65rem;
}

.zd9b47hero-tags li {
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.3rem 0.55rem;
    border: var(--border-rule);
    background: var(--surface-elevated);
    color: var(--text-muted);
}

.zd9b47hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
}

.zd9b47btn-solid {
    background: var(--primary-color) !important;
    color: #fff !important;
    border: 1px solid var(--primary-color) !important;
    border-radius: var(--radius-inner) !important;
    font-weight: 600;
    padding: 0.6rem 1.25rem !important;
}

.zd9b47btn-solid:hover {
    background: var(--primary-dark) !important;
    border-color: var(--primary-dark) !important;
    color: #fff !important;
}

.zd9b47btn-line {
    background: transparent !important;
    color: var(--secondary-color) !important;
    border: 1px solid var(--secondary-color) !important;
    border-radius: var(--radius-inner) !important;
    font-weight: 600;
    padding: 0.6rem 1.25rem !important;
}

.zd9b47btn-line:hover {
    background: var(--secondary-color) !important;
    color: #fff !important;
}

.zd9b47hero-frame {
    margin: 0;
    padding: 0.75rem;
    background: var(--surface-elevated);
    border: var(--border-rule);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-soft);
    box-sizing: border-box;
    max-width: 100%;
    overflow: clip;
}

.zd9b47hero-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-inner);
    border: var(--border-rule);
    object-fit: contain;
    box-shadow: none;
}

.zd9b47hero-cap {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin: 0.65rem 0 0;
    line-height: 1.45;
}

@media (max-width: 768px) {
    .zd9b47hero-actions {
        flex-direction: column;
    }

    .zd9b47hero-actions .btn {
        width: 100%;
    }
}

/* —— 首页板块节奏（保留类名供扩展） —— */
.zd9b47home-section {
    padding: var(--section-pad-y) 0;
}

.zd9b47home-section--band {
    background: var(--surface-band);
    border-top: var(--border-rule);
    border-bottom: var(--border-rule);
}

.zd9b47prose-grid {
    display: grid;
    gap: 2rem;
    align-items: start;
}

@media (max-width: 991px) {
    .zd9b47prose-grid {
        gap: 1.25rem;
    }
}

@media (min-width: 992px) {
    .zd9b47prose-grid {
        grid-template-columns: 1.15fr 0.85fr;
    }
}

.zd9b47prose-aside {
    border-radius: var(--radius-card);
    border: var(--border-rule);
    background: var(--surface-elevated);
    padding: 1.25rem 1.35rem;
    box-shadow: var(--shadow-soft);
    box-sizing: border-box;
}

.zd9b47prose-aside h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 0.75rem;
}

.zd9b47prose-aside ul {
    margin: 0;
    padding-left: 1.1rem;
    color: var(--text-muted);
    font-size: 0.92rem;
}

.zd9b47prose-aside li {
    margin-bottom: 0.4rem;
}

.zd9b47bento-accent {
    border-radius: var(--radius-card);
    border: 1px solid var(--border-subtle);
    background: linear-gradient(165deg, rgba(194, 65, 12, 0.08) 0%, var(--surface-elevated) 50%);
    padding: 1.5rem;
    height: 100%;
    box-sizing: border-box;
    overflow: clip;
    box-shadow: var(--shadow-soft);
}

.zd9b47bento-accent h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.zd9b47trust-strip {
    border-radius: var(--radius-card);
    border: 1px solid var(--border-subtle);
    background: var(--surface-elevated);
    padding: 1.35rem 1.5rem;
    box-shadow: var(--shadow-soft);
    box-sizing: border-box;
}

.zd9b47stat-pill {
    border-radius: var(--radius-card);
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.06);
    padding: 1.1rem 0.75rem;
    height: 100%;
    box-sizing: border-box;
    backdrop-filter: blur(6px);
}

.zd9b47article-section {
    background: var(--gray-100);
    border-top: var(--border-rule);
}

/* —— 报刊式首页区块 —— */
.zd9b47band {
    padding: var(--section-pad-y) 0;
}

.zd9b47band--paper {
    background: var(--surface-elevated);
}

.zd9b47ruled-head {
    max-width: 46rem;
    margin: 0 0 2rem;
    padding-bottom: 1rem;
    border-bottom: var(--border-title);
}

.zd9b47ruled-kicker {
    display: block;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--primary-color);
    margin-bottom: 0.35rem;
}

.zd9b47ruled-head h2 {
    font-size: clamp(1.4rem, 3vw, 1.85rem);
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.zd9b47ruled-head p {
    color: var(--text-muted);
    margin: 0;
    font-size: 0.98rem;
    line-height: 1.6;
}

.zd9b47mosaic {
    display: grid;
    gap: 0;
    border: var(--border-rule);
    border-radius: var(--radius-card);
    box-sizing: border-box;
    overflow: clip;
}

@media (min-width: 768px) {
    .zd9b47mosaic {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 992px) {
    .zd9b47mosaic {
        grid-template-columns: repeat(6, minmax(0, 1fr));
        grid-auto-rows: minmax(0, auto);
    }

    .zd9b47mosaic__cell--tall {
        grid-column: span 3;
        grid-row: span 2;
    }

    .zd9b47mosaic__cell:not(.zd9b47mosaic__cell--tall):not(.zd9b47mosaic__cell--wide) {
        grid-column: span 3;
    }

    .zd9b47mosaic__cell--wide {
        grid-column: span 6;
    }
}

.zd9b47mosaic__cell {
    padding: 1.35rem 1.4rem;
    background: var(--surface-elevated);
    border-bottom: var(--border-rule);
    box-sizing: border-box;
    min-width: 0;
}

@media (min-width: 768px) {
    .zd9b47mosaic__cell:nth-child(odd) {
        border-right: var(--border-rule);
    }
}

@media (max-width: 991px) {
    .zd9b47mosaic__cell--tall,
    .zd9b47mosaic__cell--wide {
        grid-column: 1 / -1;
        grid-row: auto;
    }
}

@media (max-width: 767px) {
    .zd9b47mosaic__cell {
        border-right: none !important;
    }
}

@media (min-width: 992px) {
    .zd9b47mosaic__cell {
        border-right: var(--border-rule);
    }

    .zd9b47mosaic__cell--wide {
        border-right: none;
    }

    .zd9b47mosaic__cell:last-child {
        border-bottom: none;
    }
}

.zd9b47mosaic__label {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--primary-color);
}

.zd9b47ledger {
    padding: clamp(2rem, 5vw, 3rem) 0;
    background: var(--surface-band);
    border-top: var(--border-rule);
    border-bottom: var(--border-rule);
}

.zd9b47ledger__lead {
    font-size: 0.98rem;
    line-height: 1.7;
    color: var(--text-color);
}

.zd9b47ledger__list li {
    position: relative;
    padding-left: 1.35rem;
    margin-bottom: 0.65rem;
    font-size: 0.92rem;
    line-height: 1.55;
    color: var(--text-muted);
}

.zd9b47ledger__list li:last-child {
    margin-bottom: 0;
}

.zd9b47ledger__mark {
    position: absolute;
    left: 0;
    top: 0.1em;
    font-weight: 700;
    color: var(--primary-color);
}

.zd9b47timeline {
    position: relative;
    padding-left: 1.35rem;
    border-left: var(--border-rule);
    margin-left: 0.35rem;
    max-width: 100%;
}

.zd9b47timeline__item {
    position: relative;
    padding-bottom: 2rem;
}

.zd9b47timeline__item:last-child {
    padding-bottom: 0;
}

.zd9b47timeline__dot {
    position: absolute;
    left: calc(-1.35rem - 6px);
    top: 0.35rem;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--primary-color);
    border: 1px solid var(--surface-elevated);
    box-shadow: 0 0 0 1px var(--surface-band);
}

.zd9b47timeline__body {
    padding-left: 0.25rem;
}

.zd9b47stat-intro {
    max-width: 42rem;
}

.zd9b47statbar {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;
    border: 1px solid var(--border-on-dark);
    border-radius: var(--radius-card);
    overflow: clip;
}

@media (min-width: 992px) {
    .zd9b47statbar {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

.zd9b47statbar__cell {
    padding: 1.35rem 1rem;
    text-align: center;
    border-right: 1px solid var(--border-on-dark-inner);
    border-bottom: none;
    box-sizing: border-box;
    min-width: 0;
}

@media (max-width: 991px) {
    .zd9b47statbar__cell:nth-child(2n) {
        border-right: none;
    }

    .zd9b47statbar__cell:nth-child(-n + 2) {
        border-bottom: 1px solid var(--border-on-dark-inner);
    }
}

@media (min-width: 992px) {
    .zd9b47statbar__cell:nth-child(4n) {
        border-right: none;
    }
}

.zd9b47statbar__num {
    font-size: clamp(1.65rem, 4vw, 2.35rem);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--accent-color);
    line-height: 1.1;
}

.zd9b47statbar__cap {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    opacity: 0.88;
    margin-top: 0.45rem;
    line-height: 1.35;
    color: #e7e5e4;
}

.zd9b47dlplank {
    border: var(--border-rule);
    border-radius: var(--radius-card);
    box-sizing: border-box;
    overflow: clip;
}

.zd9b47dlplank__row {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 1rem 1.25rem;
    padding: 1.35rem 1.25rem;
    background: var(--surface-elevated);
    border-bottom: var(--border-rule);
    box-sizing: border-box;
}

.zd9b47dlplank__row:last-child {
    border-bottom: none;
}

.zd9b47dlplank__row--alt {
    background: var(--gray-100);
}

.zd9b47dlplank__icon {
    flex: 0 0 3rem;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    border: var(--border-rule);
    color: var(--secondary-color);
    box-sizing: border-box;
}

.zd9b47dlplank__main {
    flex: 1 1 12rem;
    min-width: 0;
}

.zd9b47dlplank__bullets {
    margin: 0;
    padding-left: 1.1rem;
}

.zd9b47dlplank__cta {
    flex: 0 0 auto;
    align-self: center;
}

.zd9b47railgrid {
    border: var(--border-rule);
    border-radius: var(--radius-card);
    box-sizing: border-box;
    overflow: clip;
}

.zd9b47rail {
    height: 100%;
    padding: 1.35rem 1.25rem;
    border-right: var(--border-rule);
    border-bottom: var(--border-rule);
    border-left: var(--border-emphasis);
    background: var(--surface-elevated);
    box-sizing: border-box;
    min-width: 0;
}

.zd9b47rail h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

@media (max-width: 767px) {
    .zd9b47rail {
        border-right: none;
    }
}

@media (min-width: 768px) and (max-width: 991px) {
    .zd9b47railgrid > div:nth-child(2n) .zd9b47rail {
        border-right: none;
    }
}

@media (min-width: 992px) {
    .zd9b47railgrid > div:nth-child(4n) .zd9b47rail {
        border-right: none;
    }
}

.zd9b47certline {
    padding: 1rem 0 1rem 1rem;
    border-left: var(--border-emphasis-alt);
    height: 100%;
    box-sizing: border-box;
}

.zd9b47certline h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 0.35rem;
}

.zd9b47faqzone {
    background: var(--surface-elevated);
    border-top: var(--border-rule);
}

.zd9b47faqlist {
    margin: 0;
    max-width: 52rem;
}

.zd9b47faqlist dt {
    font-weight: 700;
    color: var(--secondary-color);
    padding: 1rem 0 0.35rem;
    border-top: var(--border-rule);
    font-size: 0.95rem;
}

.zd9b47faqlist dt:first-child {
    border-top: none;
    padding-top: 0;
}

.zd9b47faqlist dd {
    margin: 0;
    padding-bottom: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.65;
    border-bottom: var(--border-rule);
}

.zd9b47arttile {
    border-radius: var(--radius-card) !important;
    box-shadow: none !important;
    border: var(--border-rule) !important;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.zd9b47arttile:hover {
    border-color: rgba(194, 65, 12, 0.35) !important;
    box-shadow: var(--shadow-soft) !important;
}

.zd9b47dropcap::first-letter {
    float: left;
    font-family: Georgia, "Songti SC", serif;
    font-size: 3.25rem;
    line-height: 0.85;
    padding-right: 0.45rem;
    font-weight: 700;
    color: var(--primary-color);
}

.zd9b47dropcap::after {
    content: "";
    display: table;
    clear: both;
}

.zd9b47pullquote {
    margin: 0 0 1.25rem;
    padding: 1rem 1rem 1rem 1.1rem;
    border-left: var(--border-emphasis-alt);
    background: var(--surface-band);
    font-size: 1.05rem;
    font-style: italic;
    color: var(--secondary-color);
    line-height: 1.55;
    border-radius: 0 var(--radius-inner) var(--radius-inner) 0;
}

.zd9b47checkboard {
    border: var(--border-rule);
    border-radius: var(--radius-card);
    padding: 1.15rem 1.25rem;
    background: var(--surface-elevated);
    box-sizing: border-box;
}

.zd9b47checkboard__title {
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--primary-color);
    margin-bottom: 0.65rem;
}

.zd9b47checkboard__list {
    margin: 0;
    padding-left: 1.1rem;
    color: var(--text-muted);
    font-size: 0.88rem;
    line-height: 1.55;
}

/* —— 通栏导读 —— */
.zd9b47prose-section {
    background: var(--surface-elevated);
    border-bottom: var(--border-rule);
    padding: clamp(2rem, 5vw, 3rem) 0;
}

.zd9b47prose-section .row > [class*="col-"] {
    min-width: 0;
}

.zd9b47prose-section .lead {
    color: var(--text-muted);
    max-width: 52rem;
    margin: 0 auto;
    text-align: center;
    font-size: clamp(1rem, 2.2vw, 1.125rem);
}

.zd9b47lead-left {
    max-width: none !important;
    margin-left: 0 !important;
    text-align: left !important;
}

.zd9b47text-accent {
    color: var(--primary-color) !important;
}

.zd9b47section-head {
    text-align: center;
    max-width: 40rem;
    margin: 0 auto 2.5rem;
}

.zd9b47section-head h2 {
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    font-size: clamp(1.35rem, 3vw, 1.75rem);
}

.zd9b47section-head p {
    color: var(--text-muted);
    margin: 0;
    font-size: 1rem;
}

/* —— 特点卡片（与 Bootstrap .card 组合，保证边框圆角不被覆盖） —— */
.card.zd9b47feature-card {
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-soft);
    transition: transform var(--transition-speed) var(--transition-easing),
        box-shadow var(--transition-speed) var(--transition-easing);
    border: 1px solid var(--border-subtle);
    height: 100%;
    background: var(--surface-elevated);
    overflow: clip;
    box-sizing: border-box;
}

.card.zd9b47feature-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.zd9b47feature-icon--row {
    margin-bottom: 0.75rem;
}

@media (min-width: 768px) {
    .zd9b47feature-icon--row {
        margin-bottom: 0;
    }
}

.zd9b47feature-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1.25rem;
    background: rgba(194, 65, 12, 0.1);
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-inner);
    margin: 0 auto 1.25rem;
}

/* —— 统计数据 —— */
.zd9b47stats-section {
    background: var(--surface-ink);
    color: #fafaf9;
    padding: clamp(2.75rem, 6vw, 4rem) 0;
}

.zd9b47stat-number {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    margin-bottom: 0.35rem;
    color: var(--accent-color);
}

.zd9b47stat-label {
    font-size: clamp(0.8125rem, 2vw, 1rem);
    opacity: 0.9;
    max-width: 14rem;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.35;
}

.zd9b47stat-item {
    text-align: center;
    padding: 0.5rem 0.35rem;
    box-sizing: border-box;
}

.zd9b47stat-pill .zd9b47stat-item {
    padding: 0;
}

/* —— 下载区 —— */
.zd9b47download-section {
    padding: clamp(3rem, 7vw, 5rem) 0;
    background: linear-gradient(180deg, var(--gray-100) 0%, var(--surface) 100%);
}

.zd9b47download-header h2 {
    color: var(--secondary-color);
    font-weight: 700;
}

.zd9b47download-subtitle {
    color: var(--text-muted);
}

.zd9b47download-card {
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-soft);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    background: var(--surface-elevated);
    box-sizing: border-box;
    overflow: clip;
}

.zd9b47download-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.zd9b47platform-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-inner);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
}

.zd9b47ios-icon {
    background: linear-gradient(135deg, #0ea5e9, #0369a1);
    color: #fff;
}

.zd9b47android-icon {
    background: linear-gradient(135deg, #10b981, #047857);
    color: #fff;
}

.zd9b47download-info {
    background: rgba(194, 65, 12, 0.06);
    padding: 1.25rem;
    border-radius: var(--radius-inner);
    border: var(--border-rule);
    box-sizing: border-box;
}

.zd9b47info-item i {
    color: var(--primary-color);
    flex-shrink: 0;
    margin-top: 0.15em;
}

.zd9b47info-item span {
    min-width: 0;
}

.zd9b47download-action .btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
}

/* —— 新手指引 / 双栏 —— */
.zd9b47guide-section {
    padding: clamp(3rem, 6vw, 4.5rem) 0;
    background: var(--surface-elevated);
    border-top: var(--border-rule);
}

.zd9b47guide-panel {
    border-radius: var(--radius-card);
    border: 1px solid var(--border-subtle);
    padding: 1.5rem;
    height: 100%;
    background: var(--gray-100);
    box-sizing: border-box;
    overflow: clip;
}

.zd9b47guide-panel h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.zd9b47guide-panel ol,
.zd9b47guide-panel ul {
    padding-left: 1.1rem;
    margin-bottom: 0;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.zd9b47guide-panel li {
    margin-bottom: 0.5rem;
}

/* —— 安全区 —— */
.zd9b47security-section {
    padding: clamp(3rem, 7vw, 5rem) 0;
    background: var(--surface);
}

.zd9b47security-header h2 {
    color: var(--secondary-color);
    font-weight: 700;
}

.zd9b47security-subtitle {
    color: var(--text-muted);
}

.zd9b47security-card {
    background: var(--surface-elevated);
    border-radius: var(--radius-card);
    padding: 1.5rem;
    height: 100%;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-subtle);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    box-sizing: border-box;
    overflow: clip;
}

.zd9b47security-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.zd9b47security-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-inner);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 1.25rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: #fff;
}

.zd9b47security-card h3 {
    color: var(--secondary-color);
    font-weight: 600;
    text-align: center;
    margin-bottom: 1.25rem;
    font-size: 1.1rem;
}

.zd9b47security-features {
    background: rgba(194, 65, 12, 0.06);
    padding: 1.1rem 1.2rem;
    border-radius: var(--radius-inner);
    border: var(--border-rule);
    box-sizing: border-box;
}

.zd9b47feature-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 0.75rem;
    gap: 0.5rem;
}

.zd9b47feature-item:last-child {
    margin-bottom: 0;
}

.zd9b47feature-item span {
    min-width: 0;
}

.zd9b47feature-item i {
    color: var(--primary-color);
    flex-shrink: 0;
    margin-top: 0.15em;
}

.zd9b47security-certificates {
    margin-top: 3rem;
}

.zd9b47certificate-card {
    background: var(--surface-elevated);
    border-radius: var(--radius-card);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-subtle);
    height: 100%;
    transition: transform 0.25s ease;
    box-sizing: border-box;
    overflow: clip;
}

.zd9b47certificate-card:hover {
    transform: translateY(-3px);
}

.zd9b47certificate-icon {
    width: 72px;
    height: 72px;
    border-radius: var(--radius-inner);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin: 0 auto 1.25rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: #fff;
}

.zd9b47certificate-card h4 {
    color: var(--secondary-color);
    font-weight: 600;
    font-size: 1.05rem;
}

.zd9b47certificate-card p {
    color: var(--text-muted);
    margin: 0;
    font-size: 0.9rem;
}

/* —— FAQ 卡片 —— */
.card.zd9b47faq-card {
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-soft);
    transition: box-shadow 0.25s ease;
    overflow: clip;
    box-sizing: border-box;
}

.card.zd9b47faq-card:hover {
    box-shadow: var(--shadow-hover);
}

.card.zd9b47faq-card .card-title {
    color: var(--secondary-color);
    font-size: 1rem;
    font-weight: 600;
}

/* —— 文章区 —— */
#article .card {
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    box-sizing: border-box;
}

#article .card:hover {
    box-shadow: var(--shadow-hover);
}

/* FAQ 与上一区块分隔 */
section#faq,
.zd9b47faqzone {
    border-top: 1px solid var(--border-subtle);
}

/* —— 页脚 —— */
.zd9b47footer {
    background: var(--secondary-color);
    padding: 3rem 0 1.5rem;
    color: #94a3b8;
}

.zd9b47footer .zd9b47footer-title {
    color: #e2e8f0;
}

.zd9b47footer-link {
    color: #94a3b8;
}

.zd9b47footer-link:hover {
    color: var(--accent-color);
}

.zd9b47footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 1.5rem;
}

.zd9b47footer-bottom a {
    color: #cbd5e1;
}

.zd9b47footer-bottom a:hover {
    color: var(--accent-color);
}

/* —— 子页内容区 —— */
.zd9b47page-shell {
    padding: clamp(2rem, 4vw, 3rem) 0;
    background: var(--surface);
    min-height: 50vh;
}

.zd9b47page-shell .card {
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-card);
    overflow: clip;
    box-sizing: border-box;
}

.zd9b47page-shell .row > .col-lg-8 {
    min-width: 0;
}


.zd9b47page-shell aside a {
    color: var(--primary-dark);
    text-decoration: none;
}

.zd9b47page-shell aside a:hover {
    text-decoration: underline;
}

/* —— 按钮与表单 —— */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark)) !important;
    border: none !important;
}

.btn-outline-primary {
    color: var(--primary-dark) !important;
    border-color: var(--primary-color) !important;
}

.btn-outline-primary:hover {
    background: var(--primary-color) !important;
    color: #fff !important;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(194, 65, 12, 0.2);
}

/* —— 内页侧栏标题 —— */
.zd9b47sidebar-title {
    color: var(--secondary-color);
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

/* —— 动画 —— */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.zd9b47hero-copy,
.zd9b47mosaic,
.zd9b47dlplank,
.card.zd9b47feature-card,
.zd9b47download-card,
.card.zd9b47faq-card {
    animation: fadeIn 0.55s var(--transition-easing) forwards;
}

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

.navbar-toggler {
    border: none;
    padding: 0.5rem;
}

.navbar-collapse {
    background: rgba(255, 255, 255, 0.98);
    padding: 0.75rem;
    border-radius: var(--radius-card);
    margin-top: 0.5rem;
    border: 1px solid var(--border-subtle);
    box-sizing: border-box;
}

@media (min-width: 992px) {
    .navbar-collapse {
        background: transparent;
        border: none;
        padding: 0;
        margin-top: 0;
    }
}

/* 列表页分页 */
.pagebar .pagelist {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.pagebar .pagelist li {
    display: inline-flex;
    margin: 0;
}

/* 缩略图 */
.zd9b47thumb-home {
    border-radius: var(--radius-card) var(--radius-card) 0 0;
}

@media (max-width: 767px) {
    .zd9b47navbar {
        padding: 0.45rem 0;
    }

    .zd9b47navbar .navbar-collapse {
        max-height: 72vh;
        overflow-y: auto;
    }

    .zd9b47navbar .navbar-nav .nav-link {
        padding: 0.65rem 0.5rem !important;
        font-size: 0.95rem;
        min-height: 2.75rem;
        display: flex;
        align-items: center;
    }

    .zd9b47prose-section .lead {
        text-align: left;
        font-size: 0.9375rem;
        line-height: 1.7;
        max-width: none;
    }

    .zd9b47section-head {
        margin-bottom: 1.75rem;
    }

    .zd9b47section-head p {
        font-size: 0.9rem;
        line-height: 1.6;
    }

    .zd9b47guide-panel {
        padding: 1.15rem;
    }

    .zd9b47guide-panel h3 {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 0.35rem;
        font-size: 1.02rem;
        line-height: 1.35;
    }

    .zd9b47hero-section {
        padding-top: clamp(2rem, 7vw, 3.25rem);
        padding-bottom: clamp(2.25rem, 8vw, 3.75rem);
    }

    .zd9b47hero-lead {
        font-size: 0.95rem;
        margin-bottom: 1.15rem;
        word-break: break-word;
        overflow-wrap: anywhere;
    }

    .zd9b47hero-frame {
        margin-top: 0.25rem;
    }

    .zd9b47hero-actions .btn-lg {
        --bs-btn-padding-y: 0.52rem;
        --bs-btn-padding-x: 1rem;
        font-size: 0.9375rem;
    }

    .zd9b47stats-section {
        padding: clamp(2rem, 5vw, 2.75rem) 0;
    }

    .zd9b47statbar__num {
        font-size: clamp(1.35rem, 5vw, 1.85rem);
    }

    .zd9b47dlplank__cta {
        width: 100%;
        flex-basis: 100%;
    }

    .zd9b47dlplank__cta .btn {
        width: 100%;
    }

    .zd9b47stat-label {
        max-width: none;
        font-size: 0.78rem;
        line-height: 1.35;
    }

    .zd9b47stat-number {
        font-size: clamp(1.45rem, 5.5vw, 1.95rem);
    }

    .zd9b47stat-pill {
        padding: 0.75rem 0.45rem;
    }

    .zd9b47trust-strip {
        padding: 1.1rem 1.15rem;
    }

    .zd9b47security-section {
        padding: clamp(2.25rem, 5vw, 3.5rem) 0;
    }

    .zd9b47download-section {
        padding: clamp(2.25rem, 5vw, 3.5rem) 0;
    }

    .zd9b47guide-section {
        padding: clamp(2.25rem, 5vw, 3.25rem) 0;
    }

    .card.zd9b47faq-card .card-body {
        padding: 0.85rem 1rem;
    }

    .zd9b47footer {
        padding: 2rem 0 1.15rem;
    }

    .zd9b47footer-bottom p.small.mb-2 {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
        column-gap: 0.35rem;
        row-gap: 0.4rem;
    }

    .zd9b47footer-bottom p.small.mb-2 > span {
        opacity: 0.45;
        flex: 0 0 auto;
    }

    .zd9b47page-shell {
        padding-top: 1.5rem !important;
        padding-bottom: 2rem !important;
    }

    .zd9b47page-shell h1.h3 {
        font-size: clamp(1.05rem, 4.5vw, 1.35rem);
        line-height: 1.35;
        word-break: break-word;
    }

    .zd9b47page-shell header .small {
        display: flex;
        flex-wrap: wrap;
        gap: 0.35rem 0.75rem;
        row-gap: 0.25rem;
    }

    .zd9b47security-icon {
        width: 60px;
        height: 60px;
        font-size: 1.45rem;
    }

    #article .card-body {
        padding: 0.75rem;
    }

    #article .zd9b47thumb-home {
        height: 96px !important;
    }

    #article h3.h5,
    #article .card-body h3.h6,
    #article .card-body h3 {
        font-size: 0.95rem;
        line-height: 1.4;
        margin-bottom: 0;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .listbox .e2 li {
        padding-bottom: 0.75rem !important;
        margin-bottom: 0.75rem !important;
    }

    .listbox .e2 li h2.h5 {
        font-size: 1rem;
        margin-bottom: 0.35rem;
        line-height: 1.35;
        word-break: break-word;
    }

    .listbox .e2 li p {
        font-size: 0.9rem;
        line-height: 1.5;
    }

    .zd9b47thumb-list,
    .zd9b47thumb-related {
        height: 72px !important;
    }

    .zd9b47thumb-side {
        height: 50px !important;
    }

    .zd9b47thumb-cover {
        max-width: 100% !important;
        width: 100%;
        height: 170px !important;
        margin: 0 auto;
    }

    .zd9b47download-card .card-body {
        padding: 1rem !important;
    }

    .zd9b47download-card .d-flex.align-items-center {
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
        margin-bottom: 1rem !important;
    }

    .zd9b47download-card .d-flex.align-items-center .ms-3 {
        margin-left: 0 !important;
    }

    .zd9b47platform-icon {
        width: 52px;
        height: 52px;
        font-size: 1.15rem;
    }

    .zd9b47download-info {
        padding: 1rem;
    }

    .zd9b47download-action .btn {
        width: 100%;
        white-space: normal;
        overflow: visible;
        text-overflow: clip;
    }

    /* 首页：窄屏排版与触控 */
    .zd9b47hero-copy {
        border-left-width: 2px;
        padding-left: 0.85rem;
        word-break: break-word;
        overflow-wrap: anywhere;
    }

    .zd9b47hero-title {
        font-size: clamp(1.45rem, 6.5vw, 2.15rem);
        line-height: 1.12;
        hyphens: auto;
    }

    .zd9b47hero-note {
        font-size: 0.875rem;
        line-height: 1.6;
    }

    .zd9b47hero-tags li {
        font-size: 0.7rem;
        letter-spacing: 0.04em;
        padding: 0.35rem 0.5rem;
    }

    .zd9b47hero-actions .btn,
    .zd9b47hero-actions .btn-lg {
        min-height: 2.75rem;
    }

    .zd9b47band {
        padding: clamp(1.75rem, 5vw, 2.75rem) 0;
    }

    .zd9b47ruled-head {
        margin-bottom: 1.35rem;
        padding-bottom: 0.85rem;
    }

    .zd9b47ruled-head h2 {
        font-size: clamp(1.2rem, 4.5vw, 1.55rem);
    }

    .zd9b47ruled-head p {
        font-size: 0.9rem;
        line-height: 1.55;
    }

    .zd9b47mosaic__cell {
        padding: 1.05rem 1rem;
    }

    .zd9b47mosaic__cell:last-child {
        border-bottom: none;
    }

    .zd9b47mosaic__label {
        letter-spacing: 0.1em;
    }

    .zd9b47stat-intro {
        padding-left: 0.25rem;
        padding-right: 0.25rem;
        font-size: 0.8125rem;
        line-height: 1.55;
    }

    .zd9b47statbar__cell {
        padding: 1rem 0.5rem;
    }

    .zd9b47statbar__cap {
        font-size: 0.72rem;
        letter-spacing: 0.03em;
        text-transform: none;
        line-height: 1.45;
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
        padding: 0 0.2rem;
    }

    .zd9b47timeline {
        margin-left: 0.15rem;
        padding-left: 1.15rem;
    }

    .zd9b47timeline__dot {
        left: calc(-1.15rem - 5px);
    }

    .zd9b47dlplank__row {
        flex-direction: column;
        align-items: stretch;
        padding: 1.1rem 1rem;
        gap: 0.85rem;
    }

    .zd9b47dlplank__icon {
        align-self: center;
    }

    .zd9b47dlplank__main {
        flex: 1 1 auto;
        width: 100%;
    }

    .zd9b47rail {
        padding: 1.1rem 1rem;
        border-left-width: 2px;
    }

    .zd9b47pullquote {
        padding: 0.9rem 0.85rem;
        font-size: 0.95rem;
    }

    .zd9b47checkboard {
        padding: 1rem 0.95rem;
    }

    .zd9b47ledger {
        padding: clamp(1.65rem, 4vw, 2.5rem) 0;
    }

    .zd9b47ledger__lead {
        font-size: 0.9rem;
    }

    .zd9b47faqlist dt {
        padding-top: 0.85rem;
        font-size: 0.9rem;
        line-height: 1.35;
    }

    .zd9b47faqlist dd {
        font-size: 0.875rem;
        padding-bottom: 0.85rem;
    }

    .zd9b47prose-section {
        padding: clamp(1.65rem, 4vw, 2.5rem) 0;
    }

    .zd9b47dropcap::first-letter {
        font-size: 2.65rem;
        line-height: 0.82;
        padding-right: 0.35rem;
    }

    #article .d-flex.flex-column.flex-md-row {
        gap: 0.75rem !important;
    }
}

@media (max-width: 575px) {
    #article .zd9b47thumb-home {
        height: 88px !important;
    }

    .zd9b47thumb-list,
    .zd9b47thumb-related {
        height: 64px !important;
    }

    .zd9b47thumb-side {
        height: 46px !important;
    }

    .zd9b47thumb-cover {
        height: 150px !important;
    }

    .pagebar .pagelist {
        gap: 0.35rem;
    }

    .zd9b47hero-eyebrow {
        font-size: 0.68rem;
        letter-spacing: 0.14em;
        line-height: 1.35;
        max-width: 100%;
    }

    .zd9b47footer-bottom {
        font-size: 0.8125rem;
    }
}

.zd9b47info-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 0.75rem;
    gap: 0.5rem;
}

.zd9b47info-item:last-child {
    margin-bottom: 0;
}

.zd9b47friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    list-style: none;
    padding: 0;
    margin: 0.5rem 0 0;
}

.zd9b47friend-links li {
    display: inline;
}

.zd9b47friend-links a {
    color: #94a3b8;
    text-decoration: none;
}

.zd9b47friend-links a:hover {
    color: var(--accent-color);
}

.zd9b47article-content {
    line-height: 1.75;
    word-break: break-word;
}

.zd9b47article-content img {
    max-width: 100%;
    height: auto;
}

.zd9b47diyfield {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.zd9b47meta-tags {
    padding-left: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.zd9b47meta-tags .list-inline-item {
    margin-right: 0 !important;
    display: inline-block;
}

.zd9b47tagitem a {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    background: rgba(194, 65, 12, 0.1);
    color: var(--primary-dark);
    text-decoration: none;
    font-size: 0.85rem;
}

.zd9b47tagitem a:hover {
    background: rgba(194, 65, 12, 0.18);
}

.zd9b47pages .pagelist a {
    color: var(--primary-dark);
}