:root {
    --bg-primary: #f8fafc;
    --bg-white: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --brand-blue: #2563eb;
    --brand-indigo: #4f46e5;
    --brand-purple: #7c3aed;
    --brand-coral: #ff6b6b;
    --brand-green: #10b981;
    --brand-amber: #f59e0b;
    --border-soft: rgba(226, 232, 240, 0.85);
    --border-hover: rgba(147, 197, 253, 0.6);
    --shadow-subtle: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
    --shadow-card: 0 10px 30px -4px rgba(15, 23, 42, 0.06);
    --shadow-hover: 0 20px 40px -6px rgba(37, 99, 235, 0.14);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Plus Jakarta Sans', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(at 10% 10%, rgba(219, 234, 254, 0.55) 0px, transparent 50%),
        radial-gradient(at 90% 15%, rgba(254, 226, 226, 0.45) 0px, transparent 50%),
        radial-gradient(at 50% 85%, rgba(236, 253, 245, 0.55) 0px, transparent 50%);
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

a { text-decoration: none; color: inherit; }

/* 顶部通透毛玻璃导航 */
.navbar {
    height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 48px;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-soft);
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    transition: all 0.3s ease;
}
.nav-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    cursor: pointer;
}
.nav-logo-img {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.nav-brand:hover .nav-logo-img {
    transform: rotate(-6deg) scale(1.08);
}
.nav-title {
    font-size: 21px;
    font-weight: 800;
    background: linear-gradient(135deg, #0f172a 0%, #2563eb 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}
.nav-tag {
    font-size: 11px;
    font-weight: 700;
    color: #2563eb;
    background: #eff6ff;
    padding: 3px 10px;
    border-radius: 20px;
    border: 1px solid #bfdbfe;
}
.nav-menu {
    display: flex;
    align-items: center;
    gap: 28px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
}
.nav-menu a {
    transition: color 0.2s ease;
    position: relative;
    padding: 8px 4px;
}
.nav-menu a:hover {
    color: var(--brand-blue);
}
.nav-menu a.active {
    color: var(--brand-blue);
    font-weight: 800;
}
.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 4px;
    right: 4px;
    height: 3px;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    border-radius: 9999px;
}

.nav-btns {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* 按钮体系 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 9999px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: none;
}
.btn-soft {
    background: #ffffff;
    color: #334155;
    border: 1px solid #e2e8f0;
    box-shadow: 0 2px 6px rgba(0,0,0,0.03);
}
.btn-soft:hover {
    border-color: #93c5fd;
    color: #2563eb;
    background: #f8fafc;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.08);
}
.btn-magic {
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    color: #ffffff;
    box-shadow: 0 8px 20px -4px rgba(37, 99, 235, 0.35);
}
.btn-magic:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 12px 28px -4px rgba(37, 99, 235, 0.45);
}

/* ==========================================================================
   左右分栏架构 (Split Layout) - Hero 停靠在左边，右侧页面直达不被拦截
   ========================================================================== */
.portal-main-split {
    max-width: 1360px;
    margin: 0 auto;
    padding: 110px 32px 60px;
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 40px;
    align-items: start;
}

/* 👈 左侧 Hero 侧栏面板 (Sticky 吸顶停留) */
.hero-left-panel {
    position: sticky;
    top: 96px;
    background: #ffffff;
    border: 1px solid var(--border-soft);
    border-radius: 24px;
    padding: 36px 28px;
    box-shadow: var(--shadow-card);
    text-align: left;
    display: flex;
    flex-direction: column;
}

.hero-left-panel .hero-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 5px 14px;
    background: #ffffff;
    border: 1px solid #e0e7ff;
    border-radius: 9999px;
    box-shadow: var(--shadow-subtle);
    font-size: 12px;
    font-weight: 700;
    color: #4338ca;
    margin-bottom: 20px;
    align-self: flex-start;
}
.hero-pill-sparkle {
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 800;
}

.hero-left-panel .hero-title {
    font-size: 32px;
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -0.8px;
    color: #0f172a;
    margin-bottom: 16px;
    text-align: left;
}
.hero-left-panel .hero-title .gradient-text {
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #db2777 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-left-panel .hero-desc {
    font-size: 14.5px;
    color: #64748b;
    line-height: 1.65;
    margin: 0 0 24px 0;
    text-align: left;
}

.hero-left-panel .hero-features {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 26px;
    align-items: stretch;
}

.hero-left-panel .hero-feat-tag {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    font-size: 13px;
    font-weight: 600;
    color: #334155;
    box-shadow: 0 1px 2px rgba(0,0,0,0.02);
    transition: all 0.2s ease;
}

.hero-left-panel .hero-feat-tag:hover {
    background: #eff6ff;
    border-color: #bfdbfe;
    color: #2563eb;
    transform: translateX(4px);
}

.hero-action-box {
    margin-top: auto;
}

.hero-cta-btn {
    width: 100%;
    justify-content: center;
    padding: 12px 20px;
    font-size: 14px;
}

/* 👉 右侧主内容区 */
.content-right-section {
    min-width: 0;
}

.content-right-section .section-header {
    text-align: left;
    margin-bottom: 24px;
}

.content-right-section .section-badge {
    margin-bottom: 8px;
}

.content-right-section .section-header h2 {
    font-size: 30px;
    font-weight: 800;
    color: #0f172a;
    letter-spacing: -0.6px;
    margin-bottom: 8px;
}

.content-right-section .section-header p {
    font-size: 15px;
    color: #64748b;
}

.content-right-section .intro-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.content-right-section .intro-card.featured-card {
    grid-column: span 2;
}

/* 🌟 平台简介 5 大核心商业逻辑 Bento Grid 模块 (向下兼容原有类) */
.platform-intro-section {
    max-width: 1200px;
    margin: 0 auto 60px;
    padding: 0 20px;
}
.intro-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.intro-card {
    background: #ffffff;
    border: 1px solid var(--border-soft);
    border-radius: 20px;
    padding: 28px;
    text-align: left;
    box-shadow: var(--shadow-card);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
.intro-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--border-hover);
}
.intro-card.featured-card {
    grid-column: span 2;
    background: linear-gradient(135deg, #ffffff 0%, #eff6ff 100%);
    border-color: #bfdbfe;
}
.intro-card-icon {
    font-size: 28px;
    width: 52px;
    height: 52px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    background: #f8fafc;
    box-shadow: inset 0 2px 4px rgba(255,255,255,0.8), 0 4px 10px rgba(0,0,0,0.03);
}
.intro-card-tag {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 8px;
    background: #e0f2fe;
    color: #0369a1;
}
.intro-card h3 {
    font-size: 18px;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.intro-card p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.65;
    flex: 1;
}

/* 履约法则三连卡片 */
.promise-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 1100px;
    margin: 0 auto;
}
.promise-card {
    background: #ffffff;
    border: 1px solid var(--border-soft);
    border-radius: 20px;
    padding: 28px 30px;
    text-align: left;
    box-shadow: var(--shadow-card);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
}
.promise-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--border-hover);
}
.promise-icon {
    font-size: 26px;
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
}
.promise-card h4 {
    font-size: 17px;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 8px;
}
.promise-card p {
    font-size: 13.5px;
    color: #64748b;
    line-height: 1.65;
}

/* 通用 Section 布局 */
.section {
    max-width: 1240px;
    margin: 0 auto;
    padding: 130px 24px 70px;
}
.section-header {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 46px;
}
.section-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 800;
    padding: 4px 16px;
    border-radius: 9999px;
    margin-bottom: 12px;
}
.section-header h2 {
    font-size: 38px;
    font-weight: 800;
    color: #0f172a;
    letter-spacing: -0.8px;
    margin-bottom: 12px;
}
.section-header p {
    font-size: 16px;
    color: #64748b;
    line-height: 1.65;
}

/* 🎨 7 大核心产品分类体系与标品库 */
.category-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 36px;
}
.category-tab {
    padding: 10px 18px;
    background: #ffffff;
    border: 1px solid var(--border-soft);
    border-radius: 9999px;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: var(--shadow-subtle);
    display: flex;
    align-items: center;
    gap: 6px;
    user-select: none;
}
.category-tab.active, .category-tab:hover {
    background: #0f172a;
    color: #ffffff;
    border-color: #0f172a;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.25);
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}
.showcase-card {
    background: #ffffff;
    border: 1px solid var(--border-soft);
    border-radius: 20px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-card);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
}
.showcase-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: #93c5fd;
}
.card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 14px;
}
.card-icon-bubble {
    width: 50px;
    height: 50px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    box-shadow: inset 0 2px 4px rgba(255,255,255,0.8), 0 4px 10px rgba(0,0,0,0.03);
}
.card-tag {
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 8px;
    background: #f1f5f9;
    color: #475569;
}
.card-title {
    font-size: 16px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 8px;
    line-height: 1.45;
    min-height: 46px;
}
.card-desc {
    font-size: 13px;
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 18px;
    flex: 1;
}
.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 14px;
    border-top: 1px dashed #e2e8f0;
}
.price-tag {
    font-size: 20px;
    font-weight: 800;
    color: #0f172a;
}
.price-tag span {
    font-size: 12px;
    font-weight: 600;
    color: #64748b;
}
.btn-buy-mini {
    padding: 7px 16px;
    border-radius: 9999px;
    font-size: 12px;
    font-weight: 700;
    background: #f8fafc;
    color: #2563eb;
    border: 1px solid #bfdbfe;
    transition: all 0.2s;
}
.showcase-card:hover .btn-buy-mini {
    background: #2563eb;
    color: #ffffff;
    border-color: #2563eb;
}

/* 🚀 创作者计划专属风采区 */
.creator-plan-box {
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4338ca 100%);
    border-radius: 28px;
    padding: 56px 48px;
    color: #ffffff;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 48px -10px rgba(49, 46, 129, 0.4);
    margin-bottom: 40px;
}
.creator-plan-box::before {
    content: '';
    position: absolute;
    top: -100px; right: -100px;
    width: 340px; height: 340px;
    background: radial-gradient(circle, rgba(147, 51, 234, 0.35) 0%, transparent 70%);
    border-radius: 50%;
}
.plan-header {
    max-width: 760px;
    margin-bottom: 40px;
    position: relative;
    z-index: 2;
}
.plan-pill {
    display: inline-block;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    color: #c7d2fe;
    margin-bottom: 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}
.plan-header h3 {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 14px;
}
.plan-header p {
    font-size: 16px;
    color: #cbd5e1;
    line-height: 1.7;
}
.plan-steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    position: relative;
    z-index: 2;
}
.plan-step-item {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 18px;
    padding: 24px;
    transition: all 0.3s;
}
.plan-step-item:hover {
    background: rgba(255, 255, 255, 0.14);
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.25);
}
.plan-step-num {
    font-size: 14px;
    font-weight: 800;
    color: #a5b4fc;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.plan-step-title {
    font-size: 17px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 8px;
}
.plan-step-desc {
    font-size: 13px;
    color: #94a3b8;
    line-height: 1.6;
}

/* 创作者微店风采 */
.creator-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.creator-card {
    background: #ffffff;
    border: 1px solid var(--border-soft);
    border-radius: 24px;
    padding: 30px;
    box-shadow: var(--shadow-card);
    transition: all 0.3s ease;
    position: relative;
}
.creator-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}
.creator-avatar-wrap {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 18px;
}
.creator-avatar {
    width: 58px;
    height: 58px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
}
.creator-name {
    font-size: 18px;
    font-weight: 800;
    color: #0f172a;
}
.creator-sub {
    font-size: 13px;
    color: #64748b;
}
.creator-work-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}
.creator-work-tag {
    font-size: 11px;
    font-weight: 600;
    padding: 3px 8px;
    background: #f1f5f9;
    color: #334155;
    border-radius: 6px;
}
.creator-quote {
    font-size: 13px;
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 22px;
    background: #f8fafc;
    padding: 12px 14px;
    border-radius: 12px;
    border-left: 3px solid #3b82f6;
}

/* 资费体系 (188 / 1888) */
.pricing-deck {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 980px;
    margin: 0 auto;
}
.pricing-card {
    background: #ffffff;
    border: 1.5px solid var(--border-soft);
    border-radius: 28px;
    padding: 42px;
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    position: relative;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}
.pricing-card.enterprise {
    border-color: #6366f1;
    background: linear-gradient(180deg, #ffffff 0%, #f8faff 100%);
    box-shadow: 0 16px 36px -4px rgba(99, 102, 241, 0.12);
}
.pricing-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #4f46e5, #ec4899);
    color: white;
    font-size: 12px;
    font-weight: 800;
    padding: 4px 18px;
    border-radius: 9999px;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}
.pricing-header h3 {
    font-size: 24px;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 8px;
}
.pricing-sub {
    font-size: 14px;
    color: #64748b;
    margin-bottom: 22px;
    min-height: 42px;
}
.pricing-cost {
    font-size: 46px;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 28px;
    letter-spacing: -1px;
}
.pricing-cost span {
    font-size: 15px;
    font-weight: 500;
    color: #64748b;
}
.pricing-feats {
    list-style: none;
    margin-bottom: 34px;
    flex: 1;
}
.pricing-feats li {
    font-size: 14px;
    color: #334155;
    margin-bottom: 13px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.pricing-feats li .check-icon {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #dcfce7;
    color: #16a34a;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
    flex-shrink: 0;
}
.exclusive-badge {
    background: #fef3c7;
    color: #d97706;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 6px;
    margin-left: 6px;
}

/* 页脚 */
footer {
    border-top: 1px solid var(--border-soft);
    background: #ffffff;
    padding: 56px 24px 36px;
    text-align: center;
    margin-top: 60px;
}
.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 19px;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 12px;
}
.footer-copy {
    font-size: 13px;
    color: #64748b;
    margin-bottom: 16px;
}
.footer-disclaimer {
    max-width: 820px;
    margin: 0 auto;
    font-size: 12px;
    color: #94a3b8;
    line-height: 1.7;
}

/* ==========================================================================
   📱 移动端 Web H5 自适应响应式系统 (Responsive Engine)
   ========================================================================== */

/* 全局防横向溢出 */
html, body {
    overflow-x: hidden;
    width: 100%;
    -webkit-text-size-adjust: 100%;
}

/* 1. 平板与紧凑屏 (<= 1024px) */
@media (max-width: 1024px) {
    .navbar {
        padding: 0 20px;
    }
    .nav-menu {
        gap: 16px;
        font-size: 13px;
    }
    .intro-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .intro-card.featured-card {
        grid-column: span 2;
    }
    .showcase-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .plan-steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .pricing-deck, .promise-row, .creator-grid {
        grid-template-columns: 1fr;
    }
    .hero-title {
        font-size: 42px;
    }
}

/* 2. 移动端 H5 核心适配 (<= 860px) */
@media (max-width: 860px) {
    /* 顶部导航转为优雅的双层吸顶结构 */
    .navbar {
        height: auto;
        padding: 10px 14px 4px;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        background: rgba(255, 255, 255, 0.94);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
    }
    .nav-brand {
        order: 1;
        gap: 8px;
    }
    .nav-logo-img {
        width: 34px;
        height: 34px;
        border-radius: 9px;
    }
    .nav-title {
        font-size: 17px;
        letter-spacing: -0.3px;
    }
    .nav-tag {
        display: none; /* 移动端隐藏过长标签 */
    }
    .nav-btns {
        order: 2;
        gap: 6px;
    }
    .nav-btns .btn {
        padding: 6px 12px;
        font-size: 12px;
        font-weight: 700;
        gap: 4px;
    }

    /* 移动端横滑页面导航 Tab */
    .nav-menu {
        order: 3;
        width: 100%;
        display: flex;
        align-items: center;
        gap: 8px;
        overflow-x: auto;
        white-space: nowrap;
        padding: 8px 2px 4px;
        margin-top: 6px;
        border-top: 1px solid rgba(226, 232, 240, 0.6);
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    .nav-menu::-webkit-scrollbar {
        display: none;
    }
    .nav-menu a {
        flex-shrink: 0;
        font-size: 13px;
        padding: 6px 10px;
        border-radius: 9999px;
        background: #f8fafc;
        border: 1px solid #e2e8f0;
        color: #475569;
    }
    .nav-menu a:hover {
        background: #eff6ff;
        color: var(--brand-blue);
    }
    .nav-menu a.active {
        background: #2563eb;
        color: #ffffff;
        border-color: #2563eb;
        font-weight: 700;
    }
    .nav-menu a.active::after {
        display: none;
    }

    /* 左右分栏在移动端：Hero放左边，右侧页面直达不被拦截 */
    .portal-main-split {
        display: flex;
        flex-direction: row;
        gap: 10px;
        padding: 102px 8px 30px;
        align-items: flex-start;
    }

    /* 👈 左侧极简 Hero 侧栏 (停靠在左边，不占上部垂直高度) */
    .hero-left-panel {
        width: 102px;
        flex-shrink: 0;
        position: sticky;
        top: 98px;
        padding: 12px 6px;
        border-radius: 14px;
        background: rgba(255, 255, 255, 0.96);
        backdrop-filter: blur(10px);
        box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
        align-self: flex-start;
    }

    .hero-left-panel .hero-pill {
        display: none; /* 移动端隐藏过长胶囊 */
    }

    .hero-left-panel .hero-title {
        font-size: 13.5px;
        line-height: 1.25;
        letter-spacing: -0.3px;
        margin-bottom: 8px;
        text-align: center;
    }

    .hero-left-panel .hero-desc {
        display: none; /* 移动端隐藏冗长描述，让位给核心胶囊 */
    }

    .hero-left-panel .hero-features {
        gap: 6px;
        margin-bottom: 8px;
    }

    .hero-left-panel .hero-feat-tag {
        padding: 6px 3px;
        font-size: 10.5px;
        border-radius: 8px;
        justify-content: center;
        text-align: center;
        flex-direction: column;
        gap: 2px;
    }

    .hero-cta-btn {
        padding: 6px 2px;
        font-size: 10.5px;
        border-radius: 8px;
    }

    /* 👉 右侧主内容区：首屏直达！上部没有任何东西拦截！ */
    .content-right-section {
        flex: 1;
        min-width: 0;
    }

    .content-right-section .section-header {
        margin-bottom: 14px;
        text-align: left;
    }

    .content-right-section .section-header h2 {
        font-size: 17px;
        letter-spacing: -0.3px;
        line-height: 1.3;
        margin-bottom: 4px;
    }

    .content-right-section .section-header p {
        font-size: 11.5px;
        line-height: 1.5;
    }

    .content-right-section .intro-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .content-right-section .intro-card.featured-card {
        grid-column: span 1;
    }

    .content-right-section .intro-card {
        padding: 16px 12px;
        border-radius: 14px;
    }

    .content-right-section .intro-card h3 {
        font-size: 14.5px;
    }

    .content-right-section .intro-card p {
        font-size: 12px;
        line-height: 1.55;
    }

    /* 通用单页容器间距自适应 */
    .hero {
        padding: 116px 16px 36px;
        max-width: 100%;
    }
    .section {
        padding: 116px 16px 40px;
        max-width: 100%;
    }
    .intro-card-icon {
        width: 44px;
        height: 44px;
        font-size: 22px;
        border-radius: 12px;
        margin-bottom: 12px;
    }
    .intro-card-tag {
        top: 16px;
        right: 16px;
        font-size: 10.5px;
        padding: 3px 8px;
    }
    .intro-card h3 {
        font-size: 16px;
    }
    .intro-card p {
        font-size: 13.5px;
        line-height: 1.6;
    }

    /* 创作者计划、标品、小铺移动端全面单列自适应 */
    .creator-plan-box {
        padding: 32px 20px;
        border-radius: 20px;
    }
    .plan-header h3 {
        font-size: 24px;
    }
    .plan-header p {
        font-size: 14px;
    }
    .plan-steps-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .showcase-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .creator-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .pricing-card {
        padding: 28px 20px;
        border-radius: 20px;
    }
    .pricing-cost {
        font-size: 36px;
    }

    /* 底部自适应 */
    footer {
        padding: 40px 16px 28px;
        margin-top: 40px;
    }
    .footer-brand {
        font-size: 16px;
    }
    .footer-copy {
        font-size: 12px;
    }
    .footer-disclaimer {
        font-size: 11.5px;
        line-height: 1.65;
    }
}

/* 3. 窄屏手机 (<= 480px) */
@media (max-width: 480px) {
    .nav-btns .btn:first-child {
        display: none; /* 手机竖屏下隐藏多余的“体验移动微店”按钮，专注突出App与开店 */
    }
    .hero-title {
        font-size: 26px;
        letter-spacing: -0.4px;
    }
    .hero-desc {
        font-size: 14px;
    }
    .section-header h2 {
        font-size: 22px;
    }
    .hero-features {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
        width: 100%;
    }
    .hero-feat-tag {
        justify-content: center;
        padding: 7px 6px;
        font-size: 11.5px;
    }
}