/**
 * demo.css — 系统演示地址介绍页样式（Brutalist Editorial 风格）
 * 
 * 目录：
 * ─────────────────────────────────────────
 *  §1  基础变量与主题切换
 *  §2  页面容器与纹理层
 *  §3  Hero 首图区域
 *  §4  演示地址卡片区域
 *  §5  帮助信息区域
 *  §6  页脚标记
 *  §7  响应式适配
 *  §8  深色模式
 * ─────────────────────────────────────────
 */

/* ============================================================
   §1  基础变量与主题切换
   ============================================================ */

.demo-page {
    /* iOS 风格 - 圆角、毛玻璃、柔和阴影 */
    --bg-outer: #f2f2f7;
    --bg-inner: #ffffff;
    --text-main: #1c1c1e;
    --text-secondary: #8e8e93;
    --accent: #007aff;
    --accent-green: #34c759;
    --accent-orange: #ff9500;
    --shadow-color: rgba(0, 0, 0, 0.08);
    --separator: rgba(60, 60, 67, 0.12);

    --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", sans-serif;
    --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
    --font-mono: "SF Mono", "Menlo", monospace;

    --card-radius: 16px;
    --card-shadow: 0 2px 8px var(--shadow-color), 0 0 1px rgba(0, 0, 0, 0.04);

    position: relative;
    background: var(--bg-outer);
    min-height: 100vh;
    padding-top: 20px;
}

/* ============================================================
   §2  页面容器与纹理层
   ============================================================ */

.demo-page {
    font-family: var(--font-body);
    color: var(--text-main);
}

/* 颗粒纹理 - iOS 风格极淡噪点 */
.demo-grain,
.demo-card-grain,
.demo-help-grain {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(var(--text-main) 0.5px, transparent 0.5px);
    background-size: 6px 6px;
    opacity: 0.03;
    pointer-events: none;
    z-index: 1;
}

/* 网格纹理 - iOS 风格极淡 */
.demo-grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(to right, var(--text-main) 0.5px, transparent 0.5px),
        linear-gradient(to bottom, var(--text-main) 0.5px, transparent 0.5px);
    background-size: 20% 20%;
    opacity: 0.02;
    pointer-events: none;
    z-index: 1;
}

/* ============================================================
   §3  Hero 首图区域
   ============================================================ */

.demo-hero {
    position: relative;
    padding: 100px 40px 80px;
    min-height: 400px;
    background: var(--bg-inner);
    border-bottom: 1px solid var(--separator);
    overflow: hidden;
    transition: background 0.4s ease;
}

.demo-hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
            transparent 0%,
            var(--accent) 50%,
            transparent 100%);
    z-index: 10;
}

/* 警示带滚动文字 - iOS 风格 */
.tape-ribbon {
    position: absolute;
    top: 45%;
    left: -30%;
    width: 160%;
    background: var(--accent);
    color: #ffffff;
    transform: rotate(-8deg);
    padding: 0.8rem 0;
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    box-shadow: 0 4px 16px rgba(0, 122, 255, 0.3);
    z-index: 5;
    display: flex;
    overflow: hidden;
    transition: all 0.6s ease;
    border-radius: 8px;
}

.tape-ribbon::before,
.tape-ribbon::after {
    display: none;
}

.tape-scroll {
    display: flex;
    width: max-content;
    animation: tapeScroll 12s linear infinite;
}

.tape-scroll span {
    padding-right: 1.5rem;
}

@keyframes tapeScroll {
    to {
        transform: translateX(-50%);
    }
}

.hero-content-wrapper {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.demo-hero-label {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: none;
    margin-bottom: 24px;
}

.label-dot {
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
    animation: dotPulse 2s ease-in-out infinite;
}

@keyframes dotPulse {

    0%,
    100% {
        box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.2);
    }

    50% {
        box-shadow: 0 0 0 6px rgba(0, 122, 255, 0.1);
    }
}

.label-line {
    width: 40px;
    height: 1px;
    background: var(--separator);
}

.label-tag {
    padding: 4px 10px;
    background: var(--separator);
    color: var(--text-main);
    font-size: 0.65rem;
    letter-spacing: 0.5px;
    border-radius: 6px;
}

.demo-hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 6rem);
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin: 0 0 24px;
    font-weight: 700;
}

.title-word {
    display: inline-block;
    color: var(--text-main);
}

.title-outline {
    color: var(--accent);
    -webkit-text-stroke: 0;
    margin-left: 0.2em;
    text-shadow: none;
    transition: color 0.4s ease;
}

.demo-hero:hover .title-outline {
    color: var(--text-main);
}

.demo-hero-desc {
    font-family: var(--font-body);
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin: 0 0 32px;
    line-height: 1.5;
}

.demo-hero-meta {
    display: inline-flex;
    align-items: center;
    gap: 16px;
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    padding: 10px 20px;
    border: 1px solid var(--separator);
    background: var(--bg-inner);
    border-radius: 12px;
}

.meta-sep {
    opacity: 0.4;
}

/* ============================================================
   §4  演示地址卡片区域
   ============================================================ */

.demo-cards-section {
    position: relative;
    padding: 60px 40px;
    background: var(--bg-inner);
    z-index: 10;
}

.section-header-row {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 48px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--separator);
}

.section-index {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.section-title-brutal {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.02em;
}

.section-line {
    flex: 1;
    height: 1px;
    background: var(--separator);
}

.section-count {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

.demo-cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.demo-card {
    position: relative;
    background: var(--bg-inner);
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    overflow: hidden;
    animation: iosCardEnter 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) backwards;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.demo-card:nth-child(1) {
    animation-delay: 0.1s;
}

.demo-card:nth-child(2) {
    animation-delay: 0.15s;
}

.demo-card:nth-child(3) {
    animation-delay: 0.2s;
}

@keyframes iosCardEnter {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.demo-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12), 0 0 1px rgba(0, 0, 0, 0.06);
}

.demo-card:hover .demo-card-num {
    transform: scale(1.05);
}

.demo-card:hover .demo-card-badge {
    background: var(--accent);
    color: #ffffff;
}

.demo-card-inner {
    position: relative;
    z-index: 2;
    padding: 32px;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.demo-card-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 20px;
}

.demo-card-num {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
    color: var(--accent);
    letter-spacing: -0.02em;
    transition: transform 0.3s ease;
}

.demo-card-title-group {
    flex: 1;
}

.demo-card-title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 600;
    margin: 0 0 8px;
    letter-spacing: -0.01em;
    color: var(--text-main);
    transition: color 0.25s ease;
}

.demo-card:hover .demo-card-title {
    color: var(--accent);
}

.demo-card-badge {
    display: inline-block;
    padding: 4px 12px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: bold;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    background: var(--separator);
    color: var(--text-main);
    border-radius: 8px;
    transition: all 0.25s ease;
}

.demo-card-divider {
    height: 1px;
    background: var(--separator);
    margin: 0 -32px 24px;
}

.demo-card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

.demo-info-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.demo-info-label {
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    min-width: 60px;
}

.demo-info-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent);
    text-decoration: none;
    padding: 6px 12px;
    background: rgba(0, 122, 255, 0.08);
    border: none;
    border-radius: 8px;
    transition: all 0.2s ease;
    word-break: break-all;
}

.demo-info-link:hover {
    background: rgba(0, 122, 255, 0.15);
    color: var(--accent);
    transform: none;
    box-shadow: none;
}

.demo-info-link svg {
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

.demo-info-link:hover svg {
    transform: translateX(2px);
}

.demo-info-code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 6px 14px;
    background: rgba(60, 60, 67, 0.06);
    border: none;
    border-radius: 8px;
    color: var(--text-main);
    letter-spacing: 0.5px;
    transition: all 0.2s ease;
    cursor: text;
}

.demo-info-code:hover {
    background: rgba(60, 60, 67, 0.12);
    transform: none;
    box-shadow: none;
}

.demo-info-note {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 16px;
    background: rgba(0, 122, 255, 0.08);
    color: var(--text-main);
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 500;
    line-height: 1.5;
    margin-top: 4px;
    border-radius: 12px;
}

.note-mark {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    line-height: 1;
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: #ffffff;
    border-radius: 50%;
}

.demo-card-footer {
    margin-top: auto;
}

.demo-card-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 14px 24px;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: #ffffff;
    background: var(--accent);
    border: none;
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.25);
}

.demo-card-cta:hover {
    background: var(--accent);
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.35);
}

.demo-card-cta:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(0, 122, 255, 0.2);
}

.demo-card-cta svg {
    width: 14px;
    height: 14px;
    transition: transform 0.2s ease;
}

.demo-card-cta:hover svg {
    transform: translateX(4px);
}

/* 微信小程序卡片 — 微信绿主题 */
.demo-card-miniprogram {
    --card-accent: #07c160;
    --card-accent-rgb: 7, 193, 96;
}

.demo-card-miniprogram .demo-card-num {
    color: var(--card-accent);
}

.demo-card-miniprogram .demo-card-badge {
    background: rgba(var(--card-accent-rgb), 0.1);
    color: var(--card-accent);
}

.demo-card-miniprogram:hover .demo-card-badge {
    background: var(--card-accent);
    color: #ffffff;
}

.demo-card-miniprogram .demo-info-note {
    background: rgba(var(--card-accent-rgb), 0.08);
}

.demo-card-miniprogram .note-mark {
    background: var(--card-accent);
}

.demo-card-miniprogram .demo-card-cta {
    background: var(--card-accent);
    box-shadow: 0 2px 8px rgba(var(--card-accent-rgb), 0.25);
}

.demo-card-miniprogram .demo-card-cta:hover {
    background: var(--card-accent);
    box-shadow: 0 4px 12px rgba(var(--card-accent-rgb), 0.35);
}

/* APP客户端卡片 — 紫色主题 */
.demo-card-app {
    --card-accent: #af52de;
    --card-accent-rgb: 175, 82, 222;
}

.demo-card-app .demo-card-num {
    color: var(--card-accent);
}

.demo-card-app .demo-card-badge {
    background: rgba(var(--card-accent-rgb), 0.1);
    color: var(--card-accent);
}

.demo-card-app:hover .demo-card-badge {
    background: var(--card-accent);
    color: #ffffff;
}

.demo-card-app .demo-info-note {
    background: rgba(var(--card-accent-rgb), 0.08);
}

.demo-card-app .note-mark {
    background: var(--card-accent);
}

.demo-card-app .demo-card-cta {
    background: var(--card-accent);
    box-shadow: 0 2px 8px rgba(var(--card-accent-rgb), 0.25);
}

.demo-card-app .demo-card-cta:hover {
    background: var(--card-accent);
    box-shadow: 0 4px 12px rgba(var(--card-accent-rgb), 0.35);
}

/* ============================================================
   §5  帮助信息区域
   ============================================================ */

.demo-help-section {
    position: relative;
    padding: 60px 40px;
    background: var(--bg-inner);
    z-index: 10;
}

.demo-help-card {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-inner);
    border: none;
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    overflow: hidden;
    transition: all 0.3s ease;
}

.demo-help-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12), 0 0 1px rgba(0, 0, 0, 0.06);
}

.demo-help-inner {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 32px;
    flex-wrap: wrap;
}

.demo-help-num {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    color: var(--accent);
    flex-shrink: 0;
}

.demo-help-content {
    flex: 1;
    min-width: 240px;
}

.demo-help-title {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 600;
    margin: 0 0 8px;
    letter-spacing: -0.01em;
    color: var(--text-main);
}

.demo-help-desc {
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

.demo-help-actions {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

.demo-help-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-decoration: none;
    border: none;
    border-radius: 12px;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.demo-help-btn.primary {
    color: #ffffff;
    background: var(--accent);
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.25);
}

.demo-help-btn.primary:hover {
    background: var(--accent);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.35);
}

.demo-help-btn.secondary {
    color: var(--accent);
    background: transparent;
    border: 1.5px solid var(--accent);
}

.demo-help-btn.secondary:hover {
    background: var(--accent);
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.35);
}

/* 条形码装饰 - iOS 风格简化 */
.demo-barcode-wrap {
    position: relative;
    z-index: 2;
    padding: 0 32px 48px;
}

.demo-barcode {
    position: relative;
    height: 40px;
    background: repeating-linear-gradient(to right,
            var(--text-main) 0,
            var(--text-main) 2px,
            transparent 2px,
            transparent 4px,
            var(--text-main) 4px,
            var(--text-main) 6px,
            transparent 6px,
            transparent 10px,
            var(--text-main) 10px,
            var(--text-main) 11px,
            transparent 11px,
            transparent 15px,
            var(--text-main) 15px,
            var(--text-main) 19px,
            transparent 19px,
            transparent 22px);
    opacity: 0.15;
    border-radius: 4px;
}

.demo-barcode::after {
    content: attr(data-code);
    position: absolute;
    bottom: -18px;
    left: 0;
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

/* ============================================================
   §6  页脚标记 - iOS 风格
   ============================================================ */

.demo-colophon {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 32px 40px;
    background: var(--bg-outer);
    border-top: 1px solid var(--separator);
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    transition: opacity 0.3s ease;
}

.demo-colophon:hover {
    opacity: 0.8;
}

.colophon-line {
    width: 60px;
    height: 1px;
    background: var(--separator);
    transition: width 0.3s ease;
}

.demo-colophon:hover .colophon-line {
    width: 80px;
}

/* ============================================================
   §7  响应式适配
   ============================================================ */

@media (max-width: 1024px) {
    .demo-cards-container {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 24px;
    }

    .demo-hero {
        padding: 80px 30px 60px;
    }

    .demo-cards-section,
    .demo-help-section {
        padding: 40px 30px;
    }
}

@media (max-width: 768px) {
    .demo-hero-title {
        font-size: 3rem;
    }

    .section-header-row {
        flex-wrap: wrap;
        gap: 12px;
    }

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

    .section-title-brutal {
        font-size: 1.5rem;
    }

    .demo-cards-container {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .demo-help-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .demo-help-actions {
        width: 100%;
        flex-direction: column;
    }

    .demo-help-btn {
        width: 100%;
        justify-content: center;
    }

    .tape-ribbon {
        font-size: 0.75rem;
        padding: 0.6rem 0;
    }
}

@media (max-width: 480px) {
    .demo-hero {
        padding: 60px 20px 50px;
    }

    .demo-hero-title {
        font-size: 2.5rem;
    }

    .demo-hero-desc {
        font-size: 0.95rem;
    }

    .demo-cards-section,
    .demo-help-section {
        padding: 30px 20px;
    }

    .demo-card-inner {
        padding: 24px;
    }

    .demo-card-num {
        font-size: 2.5rem;
    }

    .demo-card-title {
        font-size: 1.3rem;
    }

    .demo-help-num {
        font-size: 3rem;
    }

    .demo-help-title {
        font-size: 1.4rem;
    }
}

/* ============================================================
   §8  深色模式
   ============================================================ */

.dark-mode .demo-page {
    --bg-outer: #000000;
    --bg-inner: #1c1c1e;
    --text-main: #ffffff;
    --text-secondary: #8e8e93;
    --accent: #0a84ff;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --separator: rgba(84, 84, 88, 0.65);
}

.dark-mode .demo-grain,
.dark-mode .demo-card-grain,
.dark-mode .demo-help-grain {
    opacity: 0.02;
}

.dark-mode .demo-grid-overlay {
    opacity: 0.01;
}