/* ============================================================
   55黄色仓库 · 黄仓五五，储运无忧
   Design System: "Sunlit Depot" — Warm Neo-Brutalist
   Palette: Cream / Sun Yellow / Burnt Orange / Deep Brown
   ============================================================ */

:root {
    --cream: #FFF9ED;
    --yellow: #FFC300;
    --yellow-soft: #FFF4D6;
    --orange: #FF6B35;
    --ink: #2D2A26;
    --tan: #EFE6D6;
    --shadow-sm: 3px 3px 0 var(--ink);
    --shadow-md: 4px 4px 0 var(--ink);
    --shadow-lg: 6px 6px 0 var(--ink);
}

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

body {
    font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    overflow-x: hidden;
    background: var(--cream);
    color: var(--ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

::selection {
    background: var(--yellow);
    color: var(--ink);
}

/* 顶部条码装饰 */
body::before {
    content: '';
    display: block;
    height: 6px;
    background: repeating-linear-gradient(
        90deg,
        var(--ink) 0px, var(--ink) 2px, transparent 2px, transparent 4px,
        var(--ink) 4px, var(--ink) 7px, transparent 7px, transparent 9px,
        var(--orange) 9px, var(--orange) 11px, transparent 11px, transparent 14px,
        var(--ink) 14px, var(--ink) 15px, transparent 15px, transparent 18px,
        var(--yellow) 18px, var(--yellow) 20px, transparent 20px, transparent 23px
    );
}

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

.section {
    padding: 80px 0;
    position: relative;
}

.section:nth-child(even) {
    background: var(--yellow-soft);
}

/* 区块底部虚线装饰 */
.section::after {
    content: '';
    display: block;
    height: 2px;
    width: 120px;
    background: repeating-linear-gradient(
        90deg,
        var(--ink) 0, var(--ink) 6px,
        transparent 6px, transparent 12px
    );
    opacity: 0.2;
    margin-top: 72px;
    margin-left: auto;
    margin-right: auto;
}

/* ========== 导航 ========== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 249, 237, 0.94);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 2px solid var(--ink);
    box-shadow: 0 2px 0 var(--yellow);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.25rem;
    text-decoration: none;
    color: var(--ink);
    letter-spacing: -0.5px;
}

.logo-icon {
    width: 38px;
    height: 38px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--yellow);
    border: 2px solid var(--ink);
    font-size: 1.05rem;
    font-weight: 900;
    color: var(--ink);
    box-shadow: 2px 2px 0 var(--ink);
    transform: rotate(-4deg);
    transition: transform 0.25s ease;
}

.logo:hover .logo-icon {
    transform: rotate(4deg) translateY(-2px);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
}

.main-nav a {
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--ink);
    padding: 8px 14px;
    border-radius: 4px;
    transition: all 0.2s ease;
    position: relative;
}

.main-nav a::after {
    content: '';
    display: block;
    height: 3px;
    width: 0;
    background: var(--yellow);
    transition: width 0.25s cubic-bezier(0.22, 1, 0.36, 1);
    margin-top: 2px;
    border-radius: 2px;
}

.main-nav a:hover::after {
    width: 100%;
}

.main-nav a:hover {
    background: var(--yellow-soft);
}

.nav-cta {
    padding: 9px 20px !important;
    border-radius: 6px !important;
    background: var(--ink);
    color: var(--cream) !important;
    font-weight: 700;
    border: 2px solid var(--ink) !important;
    box-shadow: 2px 2px 0 var(--yellow);
    margin-left: 10px;
}

.nav-cta:hover {
    background: var(--orange) !important;
    border-color: var(--orange) !important;
    box-shadow: 2px 2px 0 var(--ink);
    transform: translate(-1px, -1px);
}

.nav-cta:hover::after {
    width: 0;
}

.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    background: var(--yellow);
    border: 2px solid var(--ink);
    border-radius: 6px;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    box-shadow: 2px 2px 0 var(--ink);
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.menu-toggle.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.open span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========== Hero ========== */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
    padding-top: 68px;
    position: relative;
    overflow: hidden;
    background:
        linear-gradient(rgba(45, 42, 38, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(45, 42, 38, 0.03) 1px, transparent 1px),
        var(--cream);
    background-size: 24px 24px;
}

.hero::before {
    content: '55';
    position: absolute;
    top: 50%;
    right: -20px;
    transform: translateY(-50%);
    font-size: 20rem;
    font-weight: 900;
    line-height: 1;
    color: rgba(255, 195, 0, 0.18);
    z-index: 0;
    letter-spacing: -0.06em;
    user-select: none;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 8px;
    background: repeating-linear-gradient(
        90deg,
        var(--yellow) 0, var(--yellow) 24px,
        var(--ink) 24px, var(--ink) 28px,
        var(--orange) 28px, var(--orange) 44px,
        var(--ink) 44px, var(--ink) 48px
    );
}

.hero-content {
    max-width: 680px;
    position: relative;
    z-index: 1;
    animation: fadeSlideUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    font-weight: 800;
    padding: 6px 16px;
    border-radius: 20px;
    background: var(--orange);
    color: var(--cream);
    border: 2px solid var(--ink);
    box-shadow: 2px 2px 0 var(--ink);
    margin-bottom: 20px;
    letter-spacing: 1px;
    text-transform: uppercase;
    transform: rotate(-2deg);
}

.hero-eyebrow::before {
    content: '★';
    font-size: 0.75rem;
    color: var(--yellow);
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 22px;
    font-weight: 900;
    letter-spacing: -0.02em;
    color: var(--ink);
}

.hero h1 .text-accent {
    position: relative;
    display: inline-block;
    color: var(--orange);
}

.hero h1 .text-accent::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 4px;
    width: 100%;
    height: 12px;
    background: rgba(255, 195, 0, 0.4);
    z-index: -1;
    border-radius: 2px;
}

.hero p {
    font-size: 1.15rem;
    color: var(--ink);
    opacity: 0.64;
    max-width: 560px;
    margin-bottom: 36px;
    line-height: 1.75;
}

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

.hero-image {
    border-radius: 6px;
    overflow: hidden;
    border: 2px solid var(--ink);
    box-shadow: 8px 8px 0 var(--yellow);
    transform: rotate(2deg);
    position: relative;
    z-index: 1;
    flex-shrink: 0;
    max-width: 420px;
    background: var(--tan);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-image:hover {
    transform: rotate(0deg) translateY(-4px);
    box-shadow: 10px 10px 0 var(--orange);
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    border: 2px solid var(--ink);
    text-decoration: none;
    transition: all 0.2s cubic-bezier(0.22, 1, 0.36, 1);
    box-shadow: 3px 3px 0 var(--ink);
}

.btn-primary {
    background: var(--ink);
    color: var(--yellow);
}

.btn-primary:hover {
    background: var(--orange);
    color: var(--cream);
    transform: translate(1px, 1px);
    box-shadow: 2px 2px 0 var(--ink);
}

.btn-outline {
    background: transparent;
    color: var(--ink);
    border: 2px solid var(--ink);
}

.btn-outline:hover {
    background: var(--yellow);
    transform: translate(1px, 1px);
    box-shadow: 2px 2px 0 var(--ink);
}

.btn-primary:active,
.btn-outline:active {
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0 var(--ink);
}

/* ========== 标签/标题 ========== */
.section-label {
    display: inline-block;
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 3px;
    margin-bottom: 14px;
    background: var(--yellow);
    padding: 6px 16px;
    border: 2px solid var(--ink);
    box-shadow: 2px 2px 0 var(--ink);
    text-transform: uppercase;
    color: var(--ink);
    transform: rotate(-2deg);
    border-radius: 4px;
}

.section-title {
    font-size: 2.4rem;
    margin-bottom: 16px;
    font-weight: 900;
    letter-spacing: -0.02em;
    line-height: 1.15;
    color: var(--ink);
}

.section-desc {
    max-width: 600px;
    opacity: 0.65;
    margin-bottom: 44px;
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--ink);
}

/* ========== 卡片网格 ========== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 28px;
}

.category-card {
    border-radius: 6px;
    padding: 30px 28px;
    background: var(--cream);
    border: 2px solid var(--ink);
    box-shadow: 4px 4px 0 var(--ink);
    transition: all 0.22s cubic-bezier(0.22, 1, 0.36, 1);
    position: relative;
    overflow: visible;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 10px;
    right: -6px;
    width: 14px;
    height: 14px;
    background: var(--yellow);
    border: 2px solid var(--ink);
    border-radius: 3px;
    transform: rotate(45deg);
}

.category-card::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 6px;
    background: repeating-linear-gradient(
        90deg,
        var(--ink) 0, var(--ink) 6px,
        transparent 6px, transparent 12px
    );
    opacity: 0.1;
    border-radius: 4px 4px 0 0;
}

.category-card:hover {
    transform: translate(-3px, -3px);
    box-shadow: 8px 8px 0 var(--orange);
    background: var(--yellow-soft);
}

.card-icon {
    width: 54px;
    height: 54px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    font-size: 1.5rem;
    background: var(--yellow);
    border: 2px solid var(--ink);
    box-shadow: 2px 2px 0 var(--ink);
    position: relative;
    z-index: 1;
}

.card-link {
    font-weight: 700;
    font-size: 0.88rem;
    text-decoration: none;
    color: var(--orange);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 12px;
    transition: gap 0.2s ease;
}

.card-link::after {
    content: '→';
    transition: transform 0.2s ease;
}

.card-link:hover {
    gap: 10px;
}

/* ========== 特性块 ========== */
.feature-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.feature-image {
    border-radius: 6px;
    overflow: hidden;
    border: 2px solid var(--ink);
    box-shadow: 8px 8px 0 var(--yellow);
    transform: rotate(-2deg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background: var(--tan);
}

.feature-image:hover {
    transform: rotate(0deg) translateY(-3px);
    box-shadow: 10px 10px 0 var(--orange);
}

.feature-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.feature-text {
    position: relative;
    padding: 28px;
    background: var(--cream);
    border: 2px solid var(--ink);
    box-shadow: 4px 4px 0 var(--ink);
    border-radius: 6px;
}

.feature-text::after {
    content: '55';
    position: absolute;
    top: -20px;
    right: 20px;
    font-size: 3.4rem;
    font-weight: 900;
    color: rgba(255, 195, 0, 0.25);
    line-height: 1;
    pointer-events: none;
    letter-spacing: -0.05em;
}

.feature-list {
    list-style: none;
    margin-top: 16px;
}

.feature-list li {
    padding: 9px 0;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
    border-bottom: 1px dashed rgba(45, 42, 38, 0.15);
    font-size: 0.97rem;
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-list li::before {
    content: '☑';
    font-weight: 900;
    color: var(--orange);
    font-size: 1.1rem;
}

/* ========== 数据条 ========== */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
    text-align: center;
}

.stat-item {
    padding: 34px 20px 28px;
    border-radius: 6px;
    background: var(--cream);
    border: 2px solid var(--ink);
    box-shadow: 4px 4px 0 var(--ink);
    position: relative;
    transition: all 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}

.stat-item:nth-child(odd) {
    transform: rotate(1deg);
}

.stat-item:nth-child(even) {
    transform: rotate(-1deg);
}

.stat-item:hover {
    transform: rotate(0deg) translateY(-5px);
    box-shadow: 6px 6px 0 var(--yellow);
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--orange);
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.stat-number::after {
    content: '+';
    color: var(--yellow);
}

.stat-item:last-child .stat-number::after {
    content: '';
}

.stat-label {
    font-size: 0.88rem;
    opacity: 0.55;
    margin-top: 8px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

/* ========== 内容墙 ========== */
.content-wall {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
}

.content-wall-item {
    border-radius: 6px;
    overflow: hidden;
    background: var(--cream);
    border: 2px solid var(--ink);
    box-shadow: 4px 4px 0 var(--ink);
    transition: all 0.22s cubic-bezier(0.22, 1, 0.36, 1);
    display: flex;
    flex-direction: column;
}

.content-wall-item:hover {
    transform: translate(-3px, -3px);
    box-shadow: 8px 8px 0 var(--yellow);
}

.content-wall-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    border-bottom: 2px solid var(--ink);
    transition: transform 0.4s ease;
}

.content-wall-item:hover img {
    transform: scale(1.04);
}

.content-wall-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.content-wall-body .content-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 12px;
    background: var(--yellow);
    border: 1.5px solid var(--ink);
    border-radius: 3px;
    margin-bottom: 12px;
    align-self: flex-start;
    color: var(--ink);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.content-wall-body h3 {
    font-size: 1.15rem;
    font-weight: 800;
    margin-bottom: 8px;
    color: var(--ink);
    line-height: 1.4;
}

.content-wall-body p {
    font-size: 0.9rem;
    opacity: 0.6;
    line-height: 1.65;
    flex: 1;
}

.content-wall-body .content-date {
    font-size: 0.8rem;
    opacity: 0.45;
    font-weight: 500;
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px dashed rgba(45, 42, 38, 0.15);
}

/* ========== FAQ ========== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border: 2px solid var(--ink);
    border-radius: 6px;
    margin-bottom: 14px;
    overflow: hidden;
    cursor: pointer;
    background: var(--cream);
    box-shadow: 3px 3px 0 var(--ink);
    transition: all 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}

.faq-item:hover {
    transform: translateX(4px);
    box-shadow: 2px 2px 0 var(--orange);
}

.faq-item.open {
    background: var(--yellow-soft);
    box-shadow: 5px 5px 0 var(--yellow);
    transform: translate(-2px, -2px);
}

.faq-item .faq-question {
    padding: 18px 24px;
    font-weight: 700;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.05rem;
    color: var(--ink);
    gap: 16px;
}

.faq-item .faq-question::after {
    content: '+';
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--orange);
    transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    line-height: 1;
}

.faq-item.open .faq-question::after {
    content: '−';
    transform: rotate(180deg);
    color: var(--ink);
}

.faq-item .faq-answer {
    padding: 0 24px 20px;
    display: none;
    opacity: 0.68;
    line-height: 1.75;
    border-top: 1px dashed rgba(45, 42, 38, 0.2);
    padding-top: 14px;
    font-size: 0.95rem;
}

.faq-item.open .faq-answer {
    display: block;
    opacity: 0.72;
    animation: fadeSlideUp 0.3s ease both;
}

/* ========== CTA横幅 ========== */
.cta-banner {
    padding: 64px 48px;
    text-align: center;
    border-radius: 6px;
    background: var(--yellow);
    border: 2px solid var(--ink);
    box-shadow: 8px 8px 0 var(--ink);
    color: var(--ink);
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '55';
    position: absolute;
    font-size: 12rem;
    font-weight: 900;
    color: rgba(45, 42, 38, 0.07);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    line-height: 1;
    z-index: 0;
    pointer-events: none;
    letter-spacing: -0.05em;
}

.cta-banner::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 8px;
    background: repeating-linear-gradient(
        45deg,
        var(--ink) 0, var(--ink) 8px,
        var(--cream) 8px, var(--cream) 16px
    );
}

.cta-banner h2 {
    color: var(--ink);
    font-size: 2.4rem;
    font-weight: 900;
    margin-bottom: 14px;
    position: relative;
    z-index: 1;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.cta-banner p {
    position: relative;
    z-index: 1;
    color: var(--ink);
    opacity: 0.7;
    max-width: 520px;
    margin: 0 auto 32px;
    font-size: 1.05rem;
    line-height: 1.7;
}

.cta-banner .btn-primary {
    background: var(--cream);
    color: var(--ink);
    border: 2px solid var(--ink);
    box-shadow: 3px 3px 0 var(--orange);
    position: relative;
    z-index: 1;
}

.cta-banner .btn-primary:hover {
    background: var(--ink);
    color: var(--yellow);
    box-shadow: 2px 2px 0 var(--cream);
}

/* ========== 页脚 ========== */
.site-footer {
    padding: 64px 0 28px;
    background: var(--tan);
    border-top: 2px solid var(--ink);
    position: relative;
}

.site-footer::before {
    content: '';
    display: block;
    height: 6px;
    background: repeating-linear-gradient(
        90deg,
        var(--yellow) 0, var(--yellow) 20px,
        var(--orange) 20px, var(--orange) 26px,
        var(--ink) 26px, var(--ink) 30px
    );
    margin-bottom: 48px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 44px;
}

.footer-brand {
    padding-right: 30px;
}

.footer-brand h4 {
    font-size: 1.4rem;
    font-weight: 900;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
    letter-spacing: -0.02em;
}

.footer-brand h4::before {
    content: '55';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--yellow);
    border: 2px solid var(--ink);
    border-radius: 6px;
    font-size: 0.95rem;
    box-shadow: 2px 2px 0 var(--ink);
}

.footer-brand p {
    font-size: 0.9rem;
    opacity: 0.6;
    line-height: 1.8;
}

.footer-col h5 {
    font-size: 0.95rem;
    font-weight: 800;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--yellow);
    display: inline-block;
    color: var(--ink);
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul a {
    text-decoration: none;
    color: var(--ink);
    font-size: 0.9rem;
    opacity: 0.6;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.footer-col ul a::before {
    content: '▸';
    font-size: 0.8rem;
    color: var(--orange);
    opacity: 0;
    transform: translateX(-4px);
    transition: all 0.2s ease;
}

.footer-col ul a:hover {
    opacity: 1;
    color: var(--orange);
}

.footer-col ul a:hover::before {
    opacity: 1;
    transform: translateX(0);
}

.footer-bottom {
    border-top: 1px solid rgba(45, 42, 38, 0.2);
    margin-top: 48px;
    padding-top: 20px;
    text-align: center;
    font-size: 0.85rem;
    opacity: 0.6;
    color: var(--ink);
}

/* ========== 工具类 ========== */
.text-accent {
    color: var(--orange);
    font-weight: 800;
}

.text-center {
    text-align: center;
}

.seo-description {
    max-width: 600px;
    margin: 0 auto 48px;
    opacity: 0.65;
    text-align: center;
    line-height: 1.75;
    color: var(--ink);
}

.mt-0 {
    margin-top: 0;
}

.mb-0 {
    margin-bottom: 0;
}

/* ========== 动画 ========== */
@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== 焦点可达性 ========== */
a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--orange);
    outline-offset: 3px;
    border-radius: 4px;
}

/* ========== 响应式 ========== */
@media (max-width: 992px) {
    .hero {
        flex-direction: column;
        justify-content: center;
        padding-top: 110px;
        padding-bottom: 60px;
        gap: 40px;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .hero p {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-image {
        max-width: 100%;
        width: 100%;
        max-width: 480px;
    }

    .hero h1 {
        font-size: 2.8rem;
    }

    .feature-block {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .feature-text {
        order: -1;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }

    .section::after {
        margin-top: 50px;
    }

    .feature-block {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .main-nav {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .main-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 68px;
        left: 0;
        width: 100%;
        background: var(--cream);
        padding: 24px;
        gap: 6px;
        border-bottom: 2px solid var(--ink);
        box-shadow: 0 8px 20px rgba(45, 42, 38, 0.1);
        animation: fadeSlideUp 0.3s ease both;
    }

    .main-nav.open a {
        font-size: 1.05rem;
        padding: 12px 16px;
        border-bottom: 1px dashed rgba(45, 42, 38, 0.12);
        width: 100%;
    }

    .main-nav.open a::after {
        display: none;
    }

    .main-nav.open .nav-cta {
        display: inline-flex;
        justify-content: center;
        margin-left: 0;
        margin-top: 12px;
    }

    .hero::before {
        font-size: 11rem;
        right: -10px;
        top: 45%;
    }

    .hero h1 {
        font-size: 2.3rem;
    }

    .hero p {
        font-size: 1.05rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        width: 100%;
    }

    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }

    .section-title {
        font-size: 2rem;
    }

    .stat-number {
        font-size: 2.2rem;
    }

    .cta-banner {
        padding: 48px 24px;
    }

    .cta-banner h2 {
        font-size: 1.9rem;
    }

    .content-wall-item img {
        height: 180px;
    }

    .footer-bottom {
        margin-top: 32px;
    }
}

@media (max-width: 480px) {
    .cards-grid,
    .content-wall,
    .stats-bar {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .btn {
        width: 100%;
    }

    .hero {
        min-height: auto;
        padding-top: 100px;
        padding-bottom: 50px;
    }

    .hero h1 {
        font-size: 1.9rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .section {
        padding: 48px 0;
    }

    .section-title {
        font-size: 1.7rem;
        line-height: 1.2;
    }

    .section-label {
        font-size: 0.75rem;
        letter-spacing: 2px;
    }

    .cta-banner {
        padding: 40px 20px;
        box-shadow: 5px 5px 0 var(--ink);
    }

    .cta-banner h2 {
        font-size: 1.6rem;
    }

    .cta-banner::before {
        font-size: 7rem;
    }

    .footer-grid {
        gap: 32px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .category-card {
        padding: 24px 22px;
    }

    .content-wall-body {
        padding: 18px;
    }

    .feature-text {
        padding: 20px;
    }
}