/* ==========================================================================
   快连 (LetsVPN) - 粗野主义构图 · 紫外光色基调 · 底部重力分布 · 透明磨砂玻璃核心
   设计规范与标准样式表
   ========================================================================== */

:root {
    /* 紫外光色基调 (Ultra Violet Palette) */
    --uv-primary: #7B2CBF;        /* 经典紫外光主色 */
    --uv-vibrant: #9D4EDD;        /* 高饱和荧光紫 */
    --uv-electric: #C77DFF;       /* 亮电光紫 */
    --uv-mist: #E0AAFF;           /* 淡紫霓虹光 */
    --uv-dark: #3C096C;           /* 深邃紫夜 */
    --uv-deep: #240046;           /* 沉郁暗紫 */
    --uv-black: #10002B;          /* 极暗墨紫底色 */

    /* 粗野主义硬调色彩与边框 (Brutalism Specs) */
    --brutal-black: #120D1A;      /* 粗黑边线墨色 */
    --brutal-border: 2px solid #120D1A;
    --brutal-border-thick: 3px solid #120D1A;
    --brutal-shadow: 4px 4px 0px #120D1A;
    --brutal-shadow-lg: 6px 6px 0px #120D1A;
    --brutal-shadow-uv: 4px 4px 0px #7B2CBF;

    /* 文本与中性色 */
    --text-primary: #120D1A;
    --text-secondary: #4A4054;
    --text-muted: #7A6F85;
    --light-gray: #F7F5FA;        /* 带微弱紫外冷调的浅灰底 */
    --bg-white: #FFFFFF;
    
    /* 字体规范：粗野大字重无衬线 */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

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

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    background-color: #FFFFFF;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

/* 1. 公告条：通栏蓝青渐变（融合紫外光蓝青过渡），高约 46px */
.top-notice-bar {
    width: 100%;
    height: 46px;
    background: linear-gradient(90deg, #240046 0%, #7B2CBF 45%, #00B4D8 100%);
    color: #FFFFFF;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
    position: relative;
    z-index: 1001;
    border-bottom: 2px solid #10002B;
}

.notice-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.notice-badge {
    background: #FFFFFF;
    color: #240046;
    font-size: 12px;
    font-weight: 900;
    padding: 2px 10px;
    border-radius: 4px; /* 粗野主义硬几何 */
    border: 1px solid #10002B;
    letter-spacing: 0.5px;
}

.notice-text {
    font-weight: 600;
}

.notice-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.notice-link {
    font-size: 13px;
    font-weight: 800;
    text-decoration: underline;
    color: #FFFFFF;
}

.notice-close {
    cursor: pointer;
    background: none;
    border: none;
    color: #FFFFFF;
    font-size: 18px;
    line-height: 1;
    font-weight: 800;
    opacity: 0.85;
}
.notice-close:hover {
    opacity: 1;
}

/* 2. 吸顶顶栏：高 69px，底 rgba(11,18,32,0.92)，sticky */
header {
    position: sticky;
    top: 0;
    width: 100%;
    height: 69px;
    background: rgba(16, 0, 43, 0.94); /* 紫外夜幕底色 */
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    border-bottom: 3px solid #120D1A;
    box-shadow: 0 4px 12px rgba(16, 0, 43, 0.2);
    contain: layout style;
}

.logo-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-badge {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    background: linear-gradient(135deg, var(--uv-primary) 0%, var(--uv-electric) 100%);
    border: 2px solid #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 2px 2px 0px #000;
}

.logo-badge img {
    width: 22px;
    height: 22px;
    border-radius: 3px;
}

.logo-text {
    font-size: 21px;
    font-weight: 900;
    color: #FFFFFF;
    letter-spacing: -0.5px;
}

.logo-text span {
    color: var(--uv-mist);
    font-size: 13px;
    font-weight: 700;
    margin-left: 5px;
}

nav .nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-item {
    position: relative;
}

.nav-link {
    font-size: 15px;
    font-weight: 700;
    color: #E0AAFF;
    padding: 8px 14px;
    border-radius: 6px;
    display: inline-block;
}

.nav-link:hover, .nav-item:hover > .nav-link {
    color: #FFFFFF;
    background: rgba(123, 44, 191, 0.4);
}

.dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #240046;
    border: 2px solid #C77DFF;
    border-radius: 6px;
    padding: 8px;
    min-width: 170px;
    box-shadow: 4px 4px 0px #10002B;
    list-style: none;
}

.nav-item:hover .dropdown {
    display: block;
}

.dropdown a {
    display: block;
    padding: 8px 14px;
    font-size: 14px;
    font-weight: 600;
    color: #FFFFFF;
    border-radius: 4px;
}

.dropdown a:hover {
    background: #7B2CBF;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-switch {
    color: #E0AAFF;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
}

.hamburger-btn {
    display: none;
    background: #240046;
    border: 2px solid #C77DFF;
    color: #FFFFFF;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 18px;
    cursor: pointer;
}

/* 粗野主义硬核实心按钮 */
.btn-primary {
    background: #7B2CBF;
    color: #FFFFFF;
    font-weight: 900;
    padding: 10px 24px;
    border-radius: 6px;
    border: 2px solid #FFFFFF;
    box-shadow: 3px 3px 0px #120D1A;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    letter-spacing: 0.5px;
}

.btn-primary:hover {
    background: #9D4EDD;
    transform: translate(-1px, -1px);
    box-shadow: 4px 4px 0px #120D1A;
}

/* 3. 首屏 Hero：上下内边距 76px / 96px。两列网格 592px + 504px，间距 56px */
/* 粗野主义构图 · 紫外光色基调 · 底部重力分布 · 透明磨砂玻璃核心 */
.hero-section {
    position: relative;
    background: linear-gradient(180deg, #10002B 0%, #240046 50%, #3C096C 100%);
    padding: 76px 0 96px;
    color: #FFFFFF;
    overflow: hidden;
    border-bottom: 3px solid #120D1A;
}

/* 粗野主义几何底纹与紫外光氛围 */
.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 80% 20%, rgba(199, 125, 255, 0.16) 0%, transparent 50%),
        linear-gradient(90deg, rgba(224, 170, 255, 0.04) 1px, transparent 1px),
        linear-gradient(0deg, rgba(224, 170, 255, 0.04) 1px, transparent 1px);
    background-size: 100% 100%, 48px 48px, 48px 48px;
    pointer-events: none;
}

.hero-container {
    max-width: 1152px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 592px 504px;
    gap: 56px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-capsule {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: 4px;
    border: 2px solid var(--uv-mist);
    background: rgba(123, 44, 191, 0.35);
    font-size: 13.5px;
    font-weight: 800;
    color: #FFFFFF;
    margin-bottom: 22px;
    box-shadow: 2px 2px 0px #120D1A;
}

.hero-capsule::before {
    content: '⚡';
    font-size: 12px;
}

.hero-title {
    font-size: 48px;
    font-weight: 900;
    line-height: 1.18;
    letter-spacing: -0.6px;
    color: #FFFFFF;
    margin-bottom: 20px;
    text-shadow: 2px 2px 0px #120D1A;
}

.hero-desc {
    font-size: 17.5px;
    font-weight: 500;
    color: #E0AAFF;
    max-width: 560px;
    line-height: 1.68;
    margin-bottom: 34px;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 42px;
}

.hero-btn-main {
    height: 58px;
    padding: 0 34px;
    border-radius: 8px;
    background: #9D4EDD;
    color: #FFFFFF;
    font-size: 16px;
    font-weight: 900;
    border: 2px solid #FFFFFF;
    box-shadow: 4px 4px 0px #120D1A;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.hero-btn-main:hover {
    background: #C77DFF;
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px #120D1A;
}

.hero-btn-sub {
    height: 58px;
    padding: 0 34px;
    border-radius: 8px;
    background: rgba(36, 0, 70, 0.6);
    border: 2px solid var(--uv-mist);
    color: #FFFFFF;
    font-size: 16px;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 3px 3px 0px #120D1A;
}

.hero-btn-sub:hover {
    background: rgba(123, 44, 191, 0.4);
    transform: translate(-1px, -1px);
    box-shadow: 4px 4px 0px #120D1A;
}

/* 底部重力分布数据栏：厚重块面 */
.hero-stats {
    display: flex;
    gap: 20px;
    padding-top: 22px;
    border-top: 2px dashed rgba(224, 170, 255, 0.3);
}

.stat-item {
    background: rgba(36, 0, 70, 0.65);
    border: 2px solid rgba(199, 125, 255, 0.3);
    padding: 10px 16px;
    border-radius: 6px;
    box-shadow: 3px 3px 0px #10002B;
}

.stat-item h4 {
    font-size: 26px;
    font-weight: 900;
    color: #C77DFF;
    line-height: 1.1;
    margin-bottom: 4px;
}

.stat-item p {
    font-size: 12.5px;
    font-weight: 700;
    color: #E0AAFF;
}

/* 右列：504x430 透明磨砂玻璃核心 + 粗野重力面板 */
.hero-visual {
    width: 504px;
    height: 430px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 核心磨砂玻璃结构卡片：高透光渐变 + 粗黑实体边框 + 紫外光硬投影 */
.hero-visual-card {
    width: 480px;
    height: 390px;
    border-radius: 12px;
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.14) 0%, rgba(60, 9, 108, 0.75) 100%);
    border: 2px solid rgba(224, 170, 255, 0.6);
    box-shadow: 6px 6px 0px #10002B, inset 0 1px 2px rgba(255, 255, 255, 0.3);
    display: flex;
    flex-direction: column;
    padding: 22px;
    position: relative;
    z-index: 2;
    contain: layout style;
}

.glass-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 12px;
    border-bottom: 2px solid rgba(224, 170, 255, 0.25);
}

.glass-badge {
    color: #E0AAFF;
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.8px;
}

.glass-center {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 10px;
}

.glass-center img {
    max-width: 92%;
    max-height: 260px;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    border: 2px solid #120D1A;
    box-shadow: 3px 3px 0px #10002B;
}

.glass-float-tag {
    position: absolute;
    bottom: -12px;
    left: -10px;
    background: #7B2CBF;
    border: 2px solid #FFFFFF;
    color: #FFFFFF;
    padding: 8px 18px;
    border-radius: 6px;
    font-size: 12.5px;
    font-weight: 900;
    box-shadow: 4px 4px 0px #10002B;
    z-index: 3;
}

/* 4. 信任条：白底，四等分、间距 18px，大号蓝/紫数字 + 一行灰说明 */
.trust-bar-section {
    background: #FFFFFF;
    border-bottom: 3px solid #120D1A;
    padding: 38px 0;
}

.trust-container {
    max-width: 1152px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}

.trust-card {
    text-align: center;
    padding: 18px 14px;
    border-radius: 8px;
    background: #FAF7FD;
    border: 2px solid #120D1A;
    box-shadow: 3px 3px 0px #120D1A;
    contain: layout style;
}

.trust-num {
    font-size: 36px;
    font-weight: 900;
    color: #7B2CBF;
    line-height: 1.15;
    margin-bottom: 6px;
}

.trust-desc {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-secondary);
}

/* 通用模块结构与标题公式 */
.section-full {
    padding: 72px 0;
    content-visibility: auto;
    contain-intrinsic-size: 1px 650px;
}

.bg-white {
    background-color: #FFFFFF;
}

.bg-light-gray {
    background-color: var(--light-gray);
    border-top: 3px solid #120D1A;
    border-bottom: 3px solid #120D1A;
}

.section-container {
    max-width: 1152px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.center-capsule {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 4px;
    background: #E0AAFF;
    border: 2px solid #120D1A;
    color: #240046;
    font-size: 13px;
    font-weight: 900;
    margin-bottom: 12px;
    box-shadow: 2px 2px 0px #120D1A;
}

.section-title {
    font-size: 38px;
    font-weight: 900;
    letter-spacing: -0.6px;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.section-desc {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-secondary);
    max-width: 660px;
    margin: 0 auto;
}

/* 5 & 6. 能力区与场景区：3×2 共 6 卡，间距 22px，粗野主义硬核卡片 */
.grid-3-col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.card-white, .scene-card {
    background: #FFFFFF;
    border: 2px solid #120D1A;
    border-radius: 10px;
    padding: 28px 24px;
    box-shadow: 4px 4px 0px #120D1A;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    contain: layout style;
    position: relative;
}

.card-white:hover, .scene-card:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px #7B2CBF;
}

.icon-box-48 {
    width: 48px;
    height: 48px;
    border-radius: 6px;
    background: #E0AAFF;
    border: 2px solid #120D1A;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    color: #240046;
    font-size: 22px;
    box-shadow: 2px 2px 0px #120D1A;
}

.card-white h3, .scene-card h3 {
    font-size: 19px;
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.card-white p, .scene-card p {
    font-size: 14.5px;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* 7. 节点证明 #nodes：白底，深色圆角面板放地球/状态图，下方 3 列节点条目（名称左、状态右） */
.proof-panel {
    border-radius: 14px;
    background: #10002B;
    color: #FFFFFF;
    padding: 38px;
    border: 3px solid #120D1A;
    box-shadow: 6px 6px 0px #7B2CBF;
}

.proof-visual {
    text-align: center;
    margin-bottom: 32px;
}

.proof-visual img {
    max-width: 100%;
    max-height: 290px;
    width: auto;
    height: auto;
    border-radius: 8px;
    border: 2px solid #C77DFF;
    box-shadow: 4px 4px 0px #000;
}

.proof-status-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.proof-item {
    background: rgba(60, 9, 108, 0.6);
    border: 2px solid rgba(224, 170, 255, 0.4);
    border-radius: 6px;
    padding: 16px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 3px 3px 0px #000;
}

.proof-item .name {
    font-size: 15px;
    font-weight: 800;
    color: #FFFFFF;
}

.proof-item .status {
    font-size: 13px;
    color: #00F5D4;
    font-weight: 800;
}

/* 8. 价格 #pricing：浅灰底，4 列、间距 20px。专业版是推荐档 */
.grid-4-col {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.pricing-card {
    background: #FFFFFF;
    border: 2px solid #120D1A;
    border-radius: 10px;
    padding: 30px 22px;
    display: flex;
    flex-direction: column;
    position: relative;
    box-shadow: 4px 4px 0px #120D1A;
    contain: layout style;
}

.pricing-card.featured {
    border: 3px solid #7B2CBF;
    background: #FAF5FF;
    box-shadow: 6px 6px 0px #120D1A;
    transform: translateY(-4px);
}

.badge-popular {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: #7B2CBF;
    color: #FFFFFF;
    font-size: 12px;
    font-weight: 900;
    padding: 3px 16px;
    border-radius: 4px;
    border: 1px solid #120D1A;
    white-space: nowrap;
    box-shadow: 2px 2px 0px #120D1A;
}

.plan-name {
    font-size: 20px;
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.plan-subtitle {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 18px;
}

.price-val {
    font-size: 36px;
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.price-val span {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 600;
}

.price-note {
    font-size: 13px;
    color: #7B2CBF;
    font-weight: 800;
    margin-bottom: 20px;
}

.feature-list {
    list-style: none;
    margin-bottom: 26px;
    flex-grow: 1;
}

.feature-list li {
    font-size: 14px;
    color: #374151;
    margin-bottom: 11px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}

.feature-list li::before {
    content: '■';
    color: #7B2CBF;
    font-size: 10px;
}

.btn-outline-price {
    width: 100%;
    padding: 12px 0;
    border-radius: 6px;
    border: 2px solid #120D1A;
    background: #FFFFFF;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 800;
    text-align: center;
    display: inline-block;
    box-shadow: 2px 2px 0px #120D1A;
}

.btn-outline-price:hover {
    background: #E0AAFF;
    transform: translate(-1px, -1px);
    box-shadow: 3px 3px 0px #120D1A;
}

/* 9. 下载 #download：白底，3 列 6 平台，横向：图标 + 平台名 + 系统要求 + 下载标记 */
.download-item {
    background: #FFFFFF;
    border: 2px solid #120D1A;
    border-radius: 8px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: 4px 4px 0px #120D1A;
    contain: layout style;
}

.download-item:hover {
    border-color: #7B2CBF;
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px #7B2CBF;
}

.dl-icon-44 {
    width: 44px;
    height: 44px;
    border-radius: 6px;
    background: #240046;
    border: 2px solid #120D1A;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #FFFFFF;
    flex-shrink: 0;
    box-shadow: 2px 2px 0px #120D1A;
}

.dl-info {
    flex-grow: 1;
}

.dl-platform {
    font-size: 16px;
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.dl-sys {
    font-size: 12.5px;
    font-weight: 600;
    color: var(--text-secondary);
}

.dl-badge {
    font-size: 13.5px;
    color: #7B2CBF;
    font-weight: 900;
}

/* 10. 步骤 #guide：浅灰底，横向三步：序号、标题、两行说明 */
.step-card {
    background: #FFFFFF;
    border: 2px solid #120D1A;
    border-radius: 8px;
    text-align: center;
    padding: 28px 22px;
    box-shadow: 4px 4px 0px #120D1A;
}

.step-num {
    width: 46px;
    height: 46px;
    border-radius: 6px;
    background: #7B2CBF;
    border: 2px solid #120D1A;
    color: #FFFFFF;
    font-size: 18px;
    font-weight: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    box-shadow: 3px 3px 0px #120D1A;
}

.step-title {
    font-size: 18px;
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.step-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 11. 评价 #reviews：白底，3 列引言 */
.review-card {
    background: #FFFFFF;
    border: 2px solid #120D1A;
    border-radius: 8px;
    padding: 28px;
    box-shadow: 4px 4px 0px #120D1A;
    contain: layout style;
}

.review-stars {
    color: #7B2CBF;
    font-size: 14px;
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.review-quote {
    font-size: 15px;
    color: #374151;
    line-height: 1.65;
    margin-bottom: 20px;
    font-weight: 600;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar-letter {
    width: 40px;
    height: 40px;
    border-radius: 6px;
    background: #240046;
    border: 2px solid #120D1A;
    color: #FFFFFF;
    font-weight: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    box-shadow: 2px 2px 0px #120D1A;
}

.author-meta .name {
    font-size: 14.5px;
    font-weight: 900;
    color: var(--text-primary);
}

.author-meta .role {
    font-size: 12.5px;
    color: var(--text-secondary);
}

/* 12. 问答 #faq：浅灰底，单列手风琴，默认展开第 1 项 */
.faq-list {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.faq-item {
    background: #FFFFFF;
    border: 2px solid #120D1A;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 3px 3px 0px #120D1A;
    contain: layout style;
}

.faq-item.active {
    border-color: #7B2CBF;
    box-shadow: 4px 4px 0px #7B2CBF;
}

.faq-q {
    padding: 18px 24px;
    font-size: 16px;
    font-weight: 900;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-a {
    padding: 0 24px 20px;
    font-size: 14.5px;
    color: var(--text-secondary);
    line-height: 1.65;
    display: none;
}

.faq-item.active .faq-a {
    display: block;
}

/* 13. 更新 #blog：白底，3 张文章卡 */
.blog-card {
    background: #FFFFFF;
    border: 2px solid #120D1A;
    border-radius: 8px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    box-shadow: 4px 4px 0px #120D1A;
    contain: layout style;
}

.blog-tag {
    font-size: 12px;
    color: #7B2CBF;
    font-weight: 900;
    margin-bottom: 10px;
}

.blog-title {
    font-size: 18px;
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.4;
}

.blog-summary {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 18px;
    flex-grow: 1;
}

.blog-link {
    font-size: 14px;
    color: #7B2CBF;
    font-weight: 900;
}

/* 14. 页脚：海军蓝底 / 深墨紫底，5 列（品牌简介约 1.5 份 + 产品/套餐/帮助/关于） */
footer {
    background: #10002B;
    padding: 66px 0 36px;
    color: #E0AAFF;
    border-top: 3px solid #120D1A;
    content-visibility: auto;
    contain-intrinsic-size: 1px 360px;
}

.footer-top-grid {
    max-width: 1152px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
    gap: 34px;
    margin-bottom: 48px;
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 900;
    color: #FFFFFF;
    margin-bottom: 16px;
}

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

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

.footer-col a {
    color: #E0AAFF;
    font-size: 14px;
    font-weight: 600;
}

.footer-col a:hover {
    color: #FFFFFF;
    text-decoration: underline;
}

.footer-bottom-row {
    max-width: 1152px;
    margin: 0 auto;
    padding: 24px 24px 0;
    border-top: 1px solid rgba(224, 170, 255, 0.2);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: #C77DFF;
}

.footer-bottom-row a {
    margin-left: 18px;
    color: #C77DFF;
}

/* 15. 悬浮钮：右下固定两个圆角方块：主色客服、次要回顶 */
.fixed-floating-actions {
    position: fixed;
    right: 24px;
    bottom: 28px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 1002;
}

.float-btn {
    width: 52px;
    height: 52px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 900;
    box-shadow: 3px 3px 0px #120D1A;
    cursor: pointer;
}

.float-btn-primary {
    background: #7B2CBF;
    color: #FFFFFF;
    border: 2px solid #FFFFFF;
}

.float-btn-secondary {
    background: #FFFFFF;
    color: var(--text-primary);
    border: 2px solid #120D1A;
}

/* 响应式断点 */
@media (max-width: 1080px) {
    .hero-container {
        grid-template-columns: 1fr;
        padding: 0 24px;
        gap: 40px;
    }
    .hero-visual {
        width: 100%;
        max-width: 504px;
        margin: 0 auto;
    }
    .grid-4-col {
        grid-template-columns: repeat(2, 1fr);
    }
    .trust-container {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-top-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 980px) {
    header {
        padding: 0 20px;
    }
    nav .nav-links {
        display: none;
        position: absolute;
        top: 69px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: #10002B;
        padding: 12px 20px 20px;
        gap: 4px;
        border-bottom: 2px solid #7B2CBF;
        z-index: 1000;
    }
    nav.nav-open .nav-links {
        display: flex;
    }
    .hamburger-btn {
        display: inline-flex;
    }
    .grid-3-col {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 34px;
    }
    .section-title {
        font-size: 28px;
    }
    .grid-4-col, .trust-container, .proof-status-grid, .footer-top-grid {
        grid-template-columns: 1fr;
    }
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    .hero-btn-main, .hero-btn-sub {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation: none !important;
        transition-duration: 0.01ms !important;
    }
}