/* ============================================
   BI4MIB - Human-Centered Design System
   温暖 · 有机 · 有呼吸感
   ============================================ */

/* 
 * 设计理念:
 * - 不是冷冰冰的科技展示，而是一个有温度的个人空间
 * - 留白是给思考的空间，不是浪费
 * - 动效服务于内容，不喧宾夺主
 * - 色彩来自自然：日落、大地、星空
 */

:root {
    /* 核心色板 - 温暖的大地色系 */
    --color-warm: #e8a87c;
    --color-amber: #d4a574;
    --color-sand: #c9b896;
    --color-cream: #f5f0eb;

    /* 中性色 */
    --bg-deep: #0f0f0f;
    --bg-rich: #1a1816;
    --bg-surface: #242220;
    --bg-elevated: #2d2a27;

    /* 文字层级 */
    --text-primary: #faf9f7;
    --text-secondary: #a09a94;
    --text-muted: #6b6560;

    /* 强调色 - 温和但有存在感 */
    --accent: #c9a86c;
    --accent-soft: rgba(201, 168, 108, 0.12);
    --accent-glow: rgba(201, 168, 108, 0.2);

    /* 边框与分割 */
    --border-subtle: rgba(250, 249, 247, 0.05);
    --border-hover: rgba(250, 249, 247, 0.1);

    /* 圆角 - 柔和但不圆润到无聊 */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;

    /* 过渡 - 缓慢而有质感 */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --duration-normal: 500ms;
    --duration-slow: 800ms;
    --duration-breathing: 10000ms;

    /* 字体 */
    --font-display: 'SF Pro Display', -apple-system, 'Segoe UI', sans-serif;
    --font-body: 'SF Pro Text', -apple-system, 'Segoe UI', sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', monospace;

    /* 呼吸感 - 间距变量 */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 40px;
    --space-xl: 64px;
    --space-2xl: 100px;
    --space-3xl: 160px;
}

/* ============================================
   Reset & Base
   ============================================ */

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

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

body {
    font-family: var(--font-body);
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.7;
    letter-spacing: -0.01em;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: var(--accent-soft);
    color: var(--text-primary);
}

/* ============================================
   Typography Scale
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

p {
    max-width: 65ch;
    color: var(--text-secondary);
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--duration-normal) var(--ease-out-expo);
}

a:hover {
    color: var(--color-warm);
}

/* ============================================
   Layout Container
   ============================================ */

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 clamp(20px, 5vw, 60px);
}

/* ============================================
   Header & Navigation
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: 72px;
    background: rgba(15, 15, 15, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-subtle);
    transition: background var(--duration-slow) var(--ease-out-expo);
}

.header.scrolled {
    background: rgba(15, 15, 15, 0.95);
}

.header-inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 clamp(20px, 5vw, 48px);
}

.logo {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-list {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-list a {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--text-secondary);
    text-decoration: none;
    position: relative;
    padding: 4px 0;
    transition: color var(--duration-normal) var(--ease-out-expo);
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width var(--duration-normal) var(--ease-out-expo);
}

.nav-list a:hover {
    color: var(--text-primary);
}

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

.nav-list a.active {
    color: var(--text-primary);
}

.nav-list a.active::after {
    width: 100%;
    background: var(--accent);
}

/* Language Switcher */
.lang-switcher {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.lang-btn:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    min-width: 130px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--duration-normal) var(--ease-out-expo);
    z-index: 200;
}

.lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: block;
    width: 100%;
    padding: 12px 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    text-align: left;
    cursor: pointer;
    transition: all 150ms ease;
}

.lang-option:hover {
    background: var(--accent-soft);
    color: var(--text-primary);
}

.lang-option.active {
    color: var(--accent);
}

/* Mobile Menu */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    gap: 6px;
}

.menu-toggle span {
    display: block;
    width: 20px;
    height: 1.5px;
    background: var(--text-primary);
    transition: all var(--duration-normal) var(--ease-out-expo);
    transform-origin: center;
}

.mobile-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-out-expo);
    z-index: 90;
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Mobile Navigation Menu */
.mobile-nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-rich);
    transform: translateX(-100%);
    transition: transform var(--duration-slow) var(--ease-out-expo);
    z-index: 95;
    overflow-y: auto;
    padding: 40px 24px;
}

.mobile-nav.active {
    transform: translateX(0);
}

.mobile-nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mobile-nav-list a {
    display: block;
    padding: 18px 24px;
    font-size: 18px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--duration-normal) var(--ease-out-expo);
    letter-spacing: -0.01em;
}

.mobile-nav-list a:hover,
.mobile-nav-list a:focus {
    background: var(--bg-elevated);
    color: var(--text-primary);
    transform: translateX(8px);
}

@media (max-width: 800px) {
    .nav {
        display: none;
    }

    .header {
        height: 60px;
    }

    .menu-toggle {
        display: flex;
        z-index: 1001;
    }

    .lang-switcher {
        position: static;
        z-index: 1000;
    }

    .lang-btn {
        padding: 8px 12px;
        font-size: 12px;
    }

    .lang-dropdown {
        position: absolute;
        top: calc(100% + 10px);
        left: 50%;
        right: auto;
        transform: translateX(-50%) translateY(-8px);
        z-index: 1001;
    }

    .lang-dropdown.active {
        transform: translateX(-50%) translateY(0);
    }
}

/* ============================================
   Hero Section — 虚幻恍惚 · 濒死迷幻感
   色相漂移 · 模糊呼吸 · 梦境深度
   ============================================ */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: clamp(100px, 20vh, 180px) clamp(24px, 8vw, 80px) clamp(80px, 15vh, 140px);
    background: var(--bg-deep);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(
        ellipse 120% 80% at 50% 45%,
        rgba(201, 168, 108, 0.14) 0%,
        rgba(161, 140, 209, 0.06) 40%,
        transparent 70%
    );
    animation: heroAmbientPulse 16s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    top: -20%;
    left: -20%;
    width: 140%;
    height: 140%;
    background:
        radial-gradient(ellipse at 30% 40%, rgba(201, 168, 108, 0.10) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 55%, rgba(161, 140, 209, 0.08) 0%, transparent 45%),
        radial-gradient(ellipse at 50% 75%, rgba(232, 168, 124, 0.06) 0%, transparent 40%);
    filter: blur(80px);
    animation: heroHueDrift 30s ease-in-out infinite;
    pointer-events: none;
    will-change: transform;
    z-index: 0;
}

.hero-glow {
    position: absolute;
    top: -30%;
    left: 50%;
    transform: translateX(-50%);
    width: 160vw;
    height: 120vh;
    background: radial-gradient(
        ellipse at center,
        rgba(201, 168, 108, 0.12) 0%,
        rgba(201, 168, 108, 0.04) 30%,
        transparent 55%
    );
    pointer-events: none;
    animation: heroGlowPulse 14s ease-in-out infinite;
    will-change: transform, opacity;
    z-index: 0;
}

.hero-glow--secondary {
    top: -15%;
    left: 35%;
    width: 130vw;
    height: 100vh;
    background: radial-gradient(
        ellipse at 40% 50%,
        rgba(161, 140, 209, 0.08) 0%,
        rgba(232, 168, 124, 0.05) 30%,
        transparent 55%
    );
    animation: heroGlowPulse 20s ease-in-out 4s infinite;
    z-index: 0;
}

.hero .ripple-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 1px solid rgba(201, 168, 108, 0.15);
    pointer-events: none;
    animation: heroRipple 14s ease-out infinite;
    z-index: 0;
}

.hero .ripple-ring:nth-child(4) {
    animation-delay: 4.6s;
    border-color: rgba(161, 140, 209, 0.12);
}
.hero .ripple-ring:nth-child(5) {
    animation-delay: 9.2s;
    border-color: rgba(232, 168, 124, 0.10);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 720px;
}

.hero-eyebrow {
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: clamp(24px, 5vw, 48px);
    opacity: 0;
    animation: heroFadeIn 2s var(--ease-out-expo) 0.3s forwards;
}

.hero-title {
    font-size: clamp(60px, 14vw, 140px);
    font-weight: 100;
    letter-spacing: -0.05em;
    line-height: 0.92;
    margin-bottom: clamp(24px, 4vw, 40px);
    color: transparent;
    background: linear-gradient(
        135deg,
        #f5f0e1 0%,
        #e8ddd0 30%,
        #d4c5a9 60%,
        #f5f0e1 100%
    );
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 0;
    animation:
        heroFadeIn 2.5s var(--ease-out-expo) 0.5s forwards,
        heroTitleShimmer 10s ease-in-out 1s infinite;
    text-shadow: none;
    position: relative;
}

.hero-title::after {
    content: 'BI4MIB';
    position: absolute;
    inset: 0;
    font-size: inherit;
    font-weight: inherit;
    letter-spacing: inherit;
    line-height: inherit;
    color: rgba(201, 168, 108, 0.18);
    filter: blur(50px);
    z-index: -1;
    animation: heroTitleGlow 12s ease-in-out infinite;
}

.hero-subtitle {
    font-size: clamp(15px, 2.2vw, 19px);
    font-weight: 300;
    color: rgba(160, 154, 148, 0.8);
    line-height: 1.9;
    margin-bottom: clamp(32px, 6vw, 56px);
    opacity: 0;
    animation: heroFadeIn 2s var(--ease-out-expo) 0.8s forwards, heroTextBreathe 16s ease-in-out 3s infinite;
}

.hero-tags {
    display: flex;
    gap: clamp(8px, 2vw, 14px);
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: heroFadeIn 1.8s var(--ease-out-expo) 1s forwards;
}

.tag {
    padding: 8px 18px;
    background: transparent;
    border: 1px solid rgba(201, 168, 108, 0.15);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 400;
    color: rgba(201, 168, 108, 0.6);
    letter-spacing: 0.05em;
    transition: all 0.8s var(--ease-out-expo);
    backdrop-filter: blur(4px);
}

.tag:hover {
    border-color: rgba(201, 168, 108, 0.35);
    color: rgba(201, 168, 108, 0.9);
    background: rgba(201, 168, 108, 0.04);
    box-shadow: 0 0 30px rgba(201, 168, 108, 0.06);
}

.scroll-indicator {
    position: absolute;
    bottom: 48px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    animation: heroFadeIn 1s var(--ease-out-expo) 1.2s forwards;
}

.scroll-indicator span {
    display: block;
    width: 3px;
    height: 3px;
    background: rgba(201, 168, 108, 0.8);
    border-radius: 50%;
    animation: heroScrollDot 5s ease-in-out infinite;
    box-shadow:
        0 0 15px rgba(201, 168, 108, 0.5),
        0 0 40px rgba(201, 168, 108, 0.2),
        0 0 80px rgba(201, 168, 108, 0.1);
}

.hero-orbs {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(2px);
    opacity: 0;
}

/* ============================================
   Keyframes — 呼吸系统
   ============================================ */

@keyframes heroFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
        filter: blur(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
        filter: blur(0);
    }
}

@keyframes heroAmbientPulse {
    0%, 100% {
        opacity: 0.7;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.02);
    }
}

@keyframes heroHueDrift {
    0% {
        transform: rotate(0deg) scale(1);
        filter: blur(80px) hue-rotate(0deg);
    }
    33% {
        transform: rotate(8deg) scale(1.03);
        filter: blur(90px) hue-rotate(20deg);
    }
    66% {
        transform: rotate(-4deg) scale(1.01);
        filter: blur(75px) hue-rotate(40deg);
    }
    100% {
        transform: rotate(0deg) scale(1);
        filter: blur(80px) hue-rotate(60deg);
    }
}

@keyframes heroGlowPulse {
    0%, 100% {
        opacity: 0.8;
        transform: translateX(-50%) scale(1);
    }
    50% {
        opacity: 1;
        transform: translateX(-50%) scale(1.04);
    }
}

@keyframes heroRipple {
    0% {
        width: 40px;
        height: 40px;
        opacity: 0.4;
        border-width: 1px;
    }
    100% {
        width: 1400px;
        height: 1400px;
        opacity: 0;
        border-width: 1px;
    }
}

@keyframes heroTitleShimmer {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

@keyframes heroTitleGlow {
    0%, 100% {
        opacity: 0.5;
        filter: blur(50px);
    }
    50% {
        opacity: 0.8;
        filter: blur(55px);
    }
}

@keyframes heroTextBreathe {
    0%, 100% {
        opacity: 0.8;
    }
    50% {
        opacity: 1;
    }
}

@keyframes heroScrollDot {
    0%, 100% {
        opacity: 0.3;
        transform: scale(1);
        box-shadow:
            0 0 10px rgba(201, 168, 108, 0.3),
            0 0 25px rgba(201, 168, 108, 0.1);
    }
    50% {
        opacity: 1;
        transform: scale(3.5);
        box-shadow:
            0 0 15px rgba(201, 168, 108, 0.7),
            0 0 50px rgba(201, 168, 108, 0.3),
            0 0 100px rgba(201, 168, 108, 0.12);
    }
}

/* ============================================
   Sections - 统一的呼吸节奏
   ============================================ */

.section {
    padding: clamp(100px, 18vh, 200px) 0;
}

.section-header {
    text-align: center;
    margin-bottom: clamp(56px, 10vw, 112px);
}

.section-title-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s var(--ease-out);
}

.section-title-link:hover {
    transform: translateX(8px);
}

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

.section-title-link .section-title-arrow {
    font-size: 18px;
    color: var(--accent);
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s var(--ease-out);
}

.section-title-link:hover .section-title-arrow {
    opacity: 1;
    transform: translateX(0);
}

.section-title {
    font-size: clamp(28px, 5vw, 48px);
    font-weight: 400;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-muted);
    max-width: 480px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ============================================
   About Section
   ============================================ */

.about {
    background: var(--bg-deep);
}

.about-content {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: clamp(48px, 8vw, 96px);
    align-items: center;
    max-width: 900px;
    margin: 0 auto;
}

.about-avatar {
    justify-self: center;
}

.avatar-glass {
    width: clamp(120px, 30vw, 180px);
    aspect-ratio: 1 / 1;
    height: auto;
    border-radius: 50%;
    background: linear-gradient(145deg, var(--bg-elevated), var(--bg-surface));
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    font-weight: 300;
    color: var(--accent);
    box-shadow: 
        0 4px 30px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.about-info {
    text-align: left;
}

.about-name {
    font-size: clamp(28px, 4vw, 38px);
    font-weight: 500;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.about-callsign {
    font-size: 16px;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 24px;
    letter-spacing: 0.05em;
}

.about-bio {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
}

@media (max-width: 700px) {
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 36px;
    }
    
    .about-info {
        text-align: center;
    }
}

/* ============================================
   Cards Grid - 内容优先
   ============================================ */

.projects-grid,
.reviews-grid,
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.project-card,
.review-card,
.blog-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 32px;
    transition: all var(--duration-normal) var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.project-card::before,
.review-card::before,
.blog-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        transparent 0%,
        rgba(201, 168, 108, 0.03) 100%
    );
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-out-expo);
}

.project-card:hover,
.review-card:hover,
.blog-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.project-card:hover::before,
.review-card:hover::before,
.blog-card:hover::before {
    opacity: 1;
}

.project-image {
    width: 100%;
    height: 220px;
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
    overflow: hidden;
    position: relative;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.project-placeholder {
    font-size: 48px;
    color: var(--text-muted);
    opacity: 0.4;
}

.project-title,
.review-title,
.blog-title {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 12px;
    color: var(--text-primary);
    position: relative;
}

.project-description,
.review-excerpt,
.blog-excerpt {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
    position: relative;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.project-tags .tag {
    padding: 4px 12px;
    font-size: 12px;
    background: var(--accent-soft);
    border-color: transparent;
    color: var(--accent);
}

.project-meta {
    display: flex;
    gap: 20px;
    color: var(--text-muted);
    font-size: 13px;
}

.project-meta i {
    margin-right: 5px;
    color: var(--accent);
}

.review-rating {
    color: var(--color-warm);
    font-size: 15px;
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.blog-date {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

/* ============================================
   Carousel Section
   ============================================ */

.carousel-section {
    padding: 60px 0;
}

.carousel {
    position: relative;
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
}

.carousel-track {
    display: flex;
    transition: transform 0.6s var(--ease-out-expo);
}

.carousel-slide {
    min-width: 100%;
    position: relative;
}

.carousel-slide a {
    display: block;
    text-decoration: none;
    color: inherit;
}

.carousel-image {
    width: 100%;
    height: 420px;
    object-fit: cover;
    display: block;
}

.carousel-placeholder {
    width: 100%;
    height: 420px;
    background: linear-gradient(145deg, var(--bg-elevated), var(--bg-surface));
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-placeholder i {
    font-size: 56px;
    color: var(--text-muted);
    opacity: 0.3;
}

.carousel-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 80px 40px 36px;
    background: linear-gradient(to top, rgba(15, 15, 15, 0.95) 0%, transparent 100%);
}

.carousel-title {
    font-size: 26px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.carousel-excerpt {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 42px;
    height: 42px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    color: #fff;
    font-size: 14px;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out-expo);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-btn:hover {
    background: var(--accent);
    color: var(--bg-deep);
}

.carousel-prev { left: 20px; }
.carousel-next { right: 20px; }

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 20px;
    position: absolute;
    bottom: 16px;
    left: 0;
    right: 0;
    z-index: 10;
}

.carousel-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.35);
    border: none;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.carousel-dot.active {
    background: var(--accent);
    width: 20px;
    border-radius: 3px;
}

@media (max-width: 768px) {
    .carousel-image,
    .carousel-placeholder {
        aspect-ratio: 16 / 9;
        height: auto;
    }

    .carousel-content {
        padding: 60px 24px 24px;
    }

    .carousel-title {
        font-size: 20px;
    }

    .carousel-btn {
        width: 36px;
        height: 36px;
    }
}

/* ============================================
   Logs Section
   ============================================ */

.logs {
    background: var(--bg-rich);
}

.logs-stats {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.log-stat {
    text-align: center;
    padding: 28px 40px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    min-width: 140px;
}

.stat-value {
    display: block;
    font-size: 42px;
    font-weight: 300;
    letter-spacing: -0.03em;
    color: var(--accent);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.logs-table-wrapper {
    overflow-x: auto;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
}

.logs-table {
    width: 100%;
    border-collapse: collapse;
}

.logs-table th,
.logs-table td {
    padding: 16px 24px;
    text-align: left;
    border-bottom: 1px solid var(--border-subtle);
}

.logs-table th {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.logs-table td {
    color: var(--text-secondary);
    font-size: 14px;
}

.logs-table tbody tr:last-child td {
    border-bottom: none;
}

.logs-table tbody tr:hover {
    background: var(--bg-elevated);
}

@media (max-width: 768px) {
    .log-stat {
        padding: 20px 28px;
    }

    .stat-value {
        font-size: 32px;
    }

    .logs-table thead {
        display: none;
    }

    .logs-table, .logs-table tbody, .logs-table tr, .logs-table td {
        display: block;
        width: 100%;
    }

    .logs-table tr {
        margin-bottom: 16px;
        border: 1px solid var(--border-subtle);
        border-radius: var(--radius-md);
        padding: 12px;
        background: var(--bg-surface);
    }

    .logs-table td {
        text-align: right;
        padding: 8px 8px 8px 40%;
        position: relative;
        border-bottom: 1px solid rgba(255,255,255,0.05);
    }

    .logs-table td:last-child {
        border-bottom: none;
    }

    .logs-table td::before {
        content: attr(data-label);
        position: absolute;
        left: 8px;
        top: 50%;
        transform: translateY(-50%);
        font-size: 11px;
        text-transform: uppercase;
        color: var(--text-muted);
        letter-spacing: 0.08em;
    }
}

/* ============================================
   Logs Mode Filter & Show More
   ============================================ */

.logs-mode-filter {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

.log-mode-pill {
    padding: 6px 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 100px;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s var(--ease-out-expo);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

.log-mode-pill:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.log-mode-pill.active {
    background: var(--accent-soft);
    border-color: rgba(201, 168, 108, 0.3);
    color: var(--accent);
}

.logs-show-more {
    text-align: center;
    margin-top: 20px;
}

.logs-show-more-btn {
    padding: 10px 28px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 100px;
    color: var(--accent);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s var(--ease-out-expo);
}

.logs-show-more-btn:hover {
    background: var(--accent-soft);
    border-color: rgba(201, 168, 108, 0.3);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .logs-mode-filter {
        gap: 6px;
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 4px;
        -webkit-overflow-scrolling: touch;
    }

    .log-mode-pill {
        font-size: 11px;
        padding: 5px 12px;
    }
}

/* ============================================
   Contact Section
   ============================================ */

.contact {
    background: var(--bg-deep);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    max-width: 800px;
    margin: 0 auto;
}

.social-links {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all var(--duration-normal) var(--ease-out-expo);
    white-space: nowrap;
}

.social-link i {
    font-size: 18px;
    flex-shrink: 0;
}

.social-link:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.qsl-info {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 36px;
}

.qsl-info h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.qsl-info p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.qsl-info strong {
    color: var(--text-secondary);
    font-weight: 500;
}

@media (max-width: 700px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .social-links {
        margin-bottom: 32px;
    }
}

/* ============================================
   Cookie Banner - 尊重用户的选择
   ============================================ */

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-rich);
    border-top: 1px solid var(--border-subtle);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 2000;
    padding: 24px;
    transform: translateY(100%);
    transition: transform 0.5s var(--ease-out-expo);
}

.cookie-banner.show {
    transform: translateY(0);
}

.cookie-content {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 24px;
}

.cookie-icon {
    font-size: 28px;
    color: var(--accent);
    flex-shrink: 0;
}

.cookie-text {
    flex: 1;
}

.cookie-text h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.cookie-text p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
}

.cookie-actions {
    flex-shrink: 0;
}

.cookie-btn {
    padding: 12px 28px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out-expo);
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.cookie-accept {
    background: rgba(201, 168, 108, 0.15);
    color: var(--accent);
    border-color: rgba(201, 168, 108, 0.2);
}

.cookie-accept:hover {
    background: rgba(201, 168, 108, 0.25);
    border-color: rgba(201, 168, 108, 0.3);
    color: var(--accent);
}

@media (max-width: 768px) {
    .social-links {
        gap: 10px;
    }

    .social-link {
        padding: 10px 16px;
        font-size: 13px;
    }

    .social-link i {
        font-size: 16px;
    }

    .cookie-content {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }
}

/* ============================================
   Footer
   ============================================ */

.footer {
    padding: 64px 0 40px;
    background: var(--bg-rich);
    border-top: 1px solid var(--border-subtle);
}

.footer-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 28px;
}

.footer-logo {
    font-size: 22px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-primary);
}

.footer-links {
    display: flex;
    gap: 28px;
    justify-content: center;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 14px;
    text-decoration: none;
    transition: color var(--duration-normal) var(--ease-out-expo);
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-copyright {
    color: var(--text-muted);
    font-size: 13px;
    width: 100%;
    max-width: 100%;
}

.footer-copyright p {
    margin-bottom: 8px;
    max-width: none;
}

.footer-beian-wrapper {
    display: inline-flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.footer-beian {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
    font-size: 12px;
    text-decoration: none;
    transition: color var(--duration-normal) var(--ease-out-expo);
}

.footer-beian:hover {
    color: var(--text-secondary);
}

.beian-icon {
    width: 14px;
    height: 14px;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    .section {
        padding: 72px 0;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .projects-grid,
    .reviews-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Utility Classes
   ============================================ */

.liquid-shine {
    position: relative;
    overflow: hidden;
}

.liquid-shine::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(
        circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
        rgba(201, 168, 108, 0.04) 0%,
        transparent 60%
    );
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.liquid-shine:hover::after {
    opacity: 1;
}

/* ============================================
   Accessibility - 无障碍支持
   ============================================ */

/* Skip Link - 跳转到主要内容 */
.skip-link {
    position: absolute;
    top: -100%;
    left: 16px;
    z-index: 10000;
    padding: 12px 24px;
    background: var(--accent);
    color: var(--bg-deep);
    font-size: 14px;
    font-weight: 600;
    border-radius: 0 0 8px 8px;
    text-decoration: none;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--color-warm);
    outline-offset: 2px;
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus Visible - WCAG 2.4.11 Focus Appearance */
*:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
}

button:focus-visible,
a:focus-visible,
[role="button"]:focus-visible,
[role="option"]:focus-visible,
[role="tab"]:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

/* Remove default outline for mouse users */
*:focus:not(:focus-visible) {
    outline: none;
}

/* Menu Toggle Bar (replaces span) */
.menu-bar {
    display: block;
    width: 20px;
    height: 1.5px;
    background: var(--text-primary);
    transition: all var(--duration-normal) var(--ease-out-expo);
    transform-origin: center;
}

.menu-toggle.active .menu-bar:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
}

.menu-toggle.active .menu-bar:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active .menu-bar:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
}

/* Lang Chevron */
.lang-chevron {
    font-size: 10px;
    margin-left: 4px;
    transition: transform var(--duration-normal) var(--ease-out-expo);
}

.lang-btn[aria-expanded="true"] .lang-chevron {
    transform: rotate(180deg);
}

/* QSL Info as Definition List */
.qsl-info dl {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 8px 16px;
}

.qsl-info dt {
    color: var(--text-muted);
    font-size: 13px;
}

.qsl-info dd {
    color: var(--text-secondary);
    font-size: 14px;
    margin: 0;
}

.qsl-info dd a {
    color: var(--accent);
}

.qsl-info dd a:hover {
    text-decoration: underline;
}

/* ============================================
   Reduced Motion - 尊重用户动画偏好
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .hero-eyebrow,
    .hero-title,
    .hero-subtitle,
    .hero-tags,
    .scroll-indicator {
        animation: none !important;
        opacity: 1;
        transform: none;
        filter: none;
    }

    .hero::before,
    .hero::after,
    .ripple-ring,
    .hero-glow,
    .hero-glow--secondary,
    .hero-title::after {
        animation: none;
        opacity: 0;
    }

    .carousel-track {
        transition: none;
    }
}

/* ============================================
   High Contrast Mode Support
   ============================================ */

@media (forced-colors: active) {
    :root {
        --accent: LinkText;
        --border-subtle: CanvasText;
        --bg-surface: Canvas;
        --bg-elevated: Canvas;
    }

    .project-card,
    .review-card,
    .blog-card,
    .qsl-info,
    .log-stat,
    .cookie-banner {
        border: 2px solid CanvasText;
    }

    .social-link {
        border: 2px solid CanvasText;
    }

    .tag {
        border: 1px solid CanvasText;
    }
}