/* ========== 全局变量 & 基础 ========== */
:root {
    --bg-primary: #faf8f5;
    --bg-secondary: #f2efe9;
    --bg-tertiary: #eef1f6;
    --bg-card: #ffffff;
    --bg-card-hover: #fffdf8;

    --navy: #1a3a5c;
    --navy-light: #2c5282;
    --navy-dark: #0f2a44;
    --navy-soft: rgba(26, 58, 92, 0.06);

    --gold: #d4a853;
    --gold-light: #e8c87a;
    --gold-dark: #b8943a;
    --gold-soft: rgba(212, 168, 83, 0.12);
    --coral: #e76f51;
    --coral-soft: rgba(231, 111, 81, 0.10);
    --teal: #2a9d8f;
    --teal-soft: rgba(42, 157, 143, 0.10);
    --violet: #6c5ce7;
    --violet-soft: rgba(108, 92, 231, 0.10);
    --sky: #4a9bd9;
    --sky-soft: rgba(74, 155, 217, 0.10);
    --rose: #e8587d;
    --rose-soft: rgba(232, 88, 125, 0.10);

    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #7a8699;
    --text-light: #b0b8c4;

    --border-color: #e3dfd8;
    --border-light: #edeae4;
    --border-gold: #e8d5a8;

    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.10);
    --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.12);
    --shadow-gold: 0 8px 32px rgba(212, 168, 83, 0.25);
    --shadow-navy: 0 8px 32px rgba(26, 58, 92, 0.15);
    --shadow-feature: 0 8px 30px rgba(0, 0, 0, 0.06);

    --font-display: 'Georgia', 'Times New Roman', 'Songti SC', 'SimSun', serif;
    --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    --radius: 14px;
    --radius-lg: 22px;
    --radius-xl: 32px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    cursor: none;
}
@media (hover: hover) and (pointer: fine) {
    * {
        cursor: none;
    }
    .cursor-dot,
    .cursor-ring {
        display: block !important;
    }
}
@media (hover: none),
(pointer: coarse) {
    * {
        cursor: auto;
    }
    .cursor-dot,
    .cursor-ring {
        display: none !important;
    }
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

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

::selection {
    background: var(--navy);
    color: #fff;
}
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
    background: var(--navy-light);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--navy);
}

/* ========== 自定义光标 ========== */
.cursor-dot,
.cursor-ring {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 9999;
    border-radius: 50%;
    transition: width 0.2s ease, height 0.2s ease, background 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
}
.cursor-dot {
    width: 8px;
    height: 8px;
    background: var(--navy);
    box-shadow: 0 0 16px rgba(26, 58, 92, 0.5);
    transform: translate(-50%, -50%);
}
.cursor-ring {
    width: 36px;
    height: 36px;
    border: 2px solid rgba(26, 58, 92, 0.35);
    background: transparent;
    transform: translate(-50%, -50%);
    transition: width 0.25s ease, height 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}
.cursor-ring.hovered {
    width: 56px;
    height: 56px;
    border-color: rgba(212, 168, 83, 0.7);
    background: rgba(212, 168, 83, 0.10);
}

/* ========== 滚动进度条 ========== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0%;
    background: linear-gradient(90deg, var(--navy), var(--gold), var(--coral), var(--teal));
    z-index: 1002;
    border-radius: 0 2px 2px 0;
    box-shadow: 0 0 10px rgba(212, 168, 83, 0.3);
    transition: width 0.08s linear;
}

/* ========== LOADER ========== */
.loader {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.7s ease, visibility 0.7s ease;
}
.loader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.loader-inner {
    text-align: center;
    padding: 20px;
    max-width: 420px;
    width: 100%;
}
.loader-icon img {
    display: block;
    margin: 0 auto;
    width: 96px;
    height: auto;
    max-width: 100%;
    animation: loader-icon-pulse 2.4s ease-in-out infinite;
}
@keyframes loader-icon-pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.04);
        opacity: 0.85;
    }
}
.loader-title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--navy);
    letter-spacing: 4px;
    margin-bottom: 28px;
}
.loader-progress-wrap {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}
.loader-progress-track {
    flex: 1;
    height: 6px;
    background: var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.06);
}
.loader-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--navy), var(--gold), var(--coral));
    border-radius: 6px;
    transition: width 0.25s ease;
    box-shadow: 0 0 12px rgba(212, 168, 83, 0.3);
}
.loader-progress-text {
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--navy);
    min-width: 44px;
    text-align: right;
    letter-spacing: 0.5px;
}
.loader-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    line-height: 1.6;
    border-top: 1px solid var(--border-light);
    padding-top: 20px;
    margin-top: 4px;
}
.loader-hint::before {
    content: '⏳ ';
    display: inline;
}

/* ========== NAVBAR ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 18px 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all var(--transition);
    background: transparent;
}
.navbar.scrolled {
    background: rgba(250, 248, 245, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 12px 60px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}
.nav-logo {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--navy);
    letter-spacing: 2px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}
.nav-edition-badge {
    font-size: 0.6rem;
    background: var(--gold);
    color: var(--navy);
    padding: 2px 10px;
    border-radius: 20px;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-left: 2px;
    font-family: var(--font-body);
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 35px;
    list-style: none;
}
.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: color var(--transition);
    position: relative;
    padding: 5px 0;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: width var(--transition);
    border-radius: 2px;
}
.nav-links a:hover {
    color: var(--navy);
}
.nav-links a:hover::after {
    width: 100%;
}
.nav-links a.active {
    color: var(--navy);
    font-weight: 600;
}
.nav-links a.active::after {
    width: 100%;
    background: var(--gold);
}
.nav-cta {
    padding: 10px 28px;
    border: 2px solid var(--navy);
    color: var(--navy);
    background: transparent;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 1px;
    border-radius: 30px;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    font-family: var(--font-body);
}
.nav-cta:hover {
    background: var(--navy);
    color: #fff;
    box-shadow: var(--shadow-navy);
    transform: translateY(-2px);
}
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 5px;
    z-index: 1001;
}
.hamburger span {
    width: 28px;
    height: 2px;
    background: var(--navy);
    border-radius: 2px;
    transition: all var(--transition);
}
.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========== HERO ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: url('../logo/background.png') no-repeat center center / cover;
    padding: 120px 60px 80px;
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(250, 248, 245, 0.35);
    pointer-events: none;
    z-index: 1;
}
.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 15% 30%, rgba(74, 155, 217, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 85% 70%, rgba(212, 168, 83, 0.12) 0%, transparent 45%),
        radial-gradient(circle at 50% 50%, rgba(231, 111, 81, 0.06) 0%, transparent 55%);
    pointer-events: none;
    z-index: 1;
}
#particleCanvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
}
.hero-content {
    text-align: center;
    position: relative;
    z-index: 3;
    max-width: 900px;
}
.hero-edition-tag {
    margin-bottom: 18px;
}
.edition-badge {
    display: inline-block;
    background: var(--gold);
    color: var(--navy);
    padding: 6px 20px;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 1px;
    box-shadow: var(--shadow-gold);
}
.hero-badge {
    display: inline-block;
    padding: 8px 24px;
    border: 1.5px solid var(--navy);
    border-radius: 30px;
    font-size: 0.8rem;
    letter-spacing: 3px;
    color: var(--navy);
    background: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    margin-bottom: 30px;
    animation: fadeInUp 0.8s ease 0.2s both;
    backdrop-filter: blur(10px);
}
.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3.5rem, 8vw, 7rem);
    font-weight: 700;
    color: var(--navy);
    letter-spacing: 4px;
    line-height: 1.1;
    margin-bottom: 10px;
    animation: fadeInUp 0.8s ease 0.35s both;
}
.hero-title .highlight {
    background: linear-gradient(135deg, var(--navy) 0%, var(--gold) 50%, var(--coral) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}
.hero-title .highlight::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--navy), var(--gold), var(--coral));
    border-radius: 2px;
}
.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    letter-spacing: 1px;
    margin-bottom: 12px;
    animation: fadeInUp 0.8s ease 0.5s both;
    font-weight: 400;
}
.hero-desc {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 650px;
    margin: 0 auto 40px;
    animation: fadeInUp 0.8s ease 0.6s both;
    line-height: 1.8;
}
.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.75s both;
}
.btn-primary {
    padding: 16px 40px;
    background: var(--navy);
    color: #fff;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    border: none;
    border-radius: 40px;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    font-family: var(--font-body);
    box-shadow: var(--shadow-navy);
}
.btn-primary:hover {
    transform: translateY(-4px) scale(1.03);
    box-shadow: 0 16px 40px rgba(26, 58, 92, 0.3);
    background: var(--navy-light);
}
.btn-secondary {
    padding: 16px 40px;
    background: transparent;
    color: var(--navy);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    border: 2px solid var(--navy);
    border-radius: 40px;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    font-family: var(--font-body);
}
.btn-secondary:hover {
    background: rgba(26, 58, 92, 0.08);
    transform: translateY(-4px) scale(1.03);
    box-shadow: var(--shadow-sm);
}
.hero-countdown {
    margin-top: 40px;
    animation: fadeInUp 0.8s ease 0.85s both;
}
.countdown-label {
    font-size: 0.8rem;
    letter-spacing: 2px;
    color: var(--text-muted);
    display: block;
    margin-bottom: 10px;
}
.countdown-grid {
    display: flex;
    justify-content: center;
    gap: 16px;
}
.countdown-item {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    padding: 10px 16px;
    min-width: 64px;
    text-align: center;
}
.countdown-item .num {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--navy);
    display: block;
    line-height: 1.2;
}
.countdown-item .label {
    font-size: 0.6rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 1px;
}
.hero-scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-muted);
    font-size: 0.7rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    animation: bounce-down 2s infinite;
    cursor: pointer;
    z-index: 3;
    text-decoration: none;
}
@keyframes bounce-down {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(8px);
    }
}
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== TICKER ========== */
.ticker-wrapper {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
    overflow: hidden;
    position: relative;
    z-index: 5;
}
.ticker-track {
    display: flex;
    gap: 40px;
    animation: ticker-scroll 30s linear infinite;
    width: max-content;
    white-space: nowrap;
}
.ticker-wrapper:hover .ticker-track {
    animation-play-state: paused;
}
@keyframes ticker-scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}
.ticker-item {
    font-size: 0.8rem;
    letter-spacing: 1px;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--bg-card);
    border-radius: 20px;
    border: 1px solid var(--border-light);
}
.ticker-item .up {
    color: var(--teal);
    font-weight: 600;
}
.ticker-item .down {
    color: var(--coral);
    font-weight: 600;
}

/* ========== SECTION COMMON ========== */
section {
    padding: 100px 60px;
    position: relative;
}
.section-label {
    display: inline-block;
    font-size: 0.75rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--navy);
    margin-bottom: 16px;
    font-weight: 600;
    padding: 6px 16px;
    background: rgba(26, 58, 92, 0.06);
    border-radius: 20px;
}
.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--navy);
    letter-spacing: 1px;
    margin-bottom: 20px;
    line-height: 1.25;
}
.section-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.8;
    margin-bottom: 50px;
}
.section-divider {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--navy), var(--gold), var(--coral), var(--teal));
    border-radius: 2px;
    margin-bottom: 30px;
}

.reveal {
    opacity: 0;
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.from-left {
    transform: translateX(-40px);
}
.reveal.from-right {
    transform: translateX(40px);
}
.reveal.from-bottom {
    transform: translateY(40px);
}
.reveal.from-top {
    transform: translateY(-40px);
}
.reveal.visible {
    opacity: 1;
    transform: translate(0);
}

/* ========== ABOUT ========== */
.about {
    background: var(--bg-primary);
}
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
    line-height: 1.9;
}
.about-text p strong {
    color: var(--navy);
    font-weight: 600;
}
.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}
.about-feature {
    background: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    transition: all var(--transition);
    transform-style: preserve-3d;
    will-change: transform;
    position: relative;
    overflow: hidden;
}
.about-feature::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    border-radius: 4px 0 0 4px;
}
.about-feature:nth-child(1)::before {
    background: var(--navy);
}
.about-feature:nth-child(2)::before {
    background: var(--gold);
}
.about-feature:nth-child(3)::before {
    background: var(--coral);
}
.about-feature:nth-child(4)::before {
    background: var(--teal);
}
.about-feature:hover {
    border-color: var(--border-gold);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.about-feature-icon {
    font-size: 1.8rem;
    margin-bottom: 12px;
}
.about-feature h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--navy);
}
.about-feature p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 0;
}
.about-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}
.about-visual-ring {
    width: 380px;
    height: 380px;
    border: 3px solid rgba(26, 58, 92, 0.2);
    border-radius: 50%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: rotate-slow 20s linear infinite;
}
.about-visual-ring::before {
    content: '';
    position: absolute;
    inset: -20px;
    border: 2px dashed rgba(212, 168, 83, 0.35);
    border-radius: 50%;
    animation: rotate-slow-reverse 15s linear infinite;
}
.about-visual-center {
    text-align: center;
    animation: rotate-slow-reverse 20s linear infinite;
}
.about-visual-center .big-num {
    font-family: var(--font-display);
    font-size: 5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--navy), var(--gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}
.about-visual-center .big-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 3px;
    text-transform: uppercase;
}
@keyframes rotate-slow {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}
@keyframes rotate-slow-reverse {
    from {
        transform: rotate(360deg);
    }
    to {
        transform: rotate(0deg);
    }
}

/* ========== 往届回顾 ========== */
.editions {
    background: var(--bg-secondary);
}
.editions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 10px;
}
.edition-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: all var(--transition);
    position: relative;
    box-shadow: var(--shadow-sm);
}
.edition-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-gold);
}
.edition-card .edition-year {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--navy);
    opacity: 0.15;
    line-height: 1;
    margin-bottom: 8px;
}
.edition-badge-tag {
    display: inline-block;
    background: var(--navy-soft);
    color: var(--navy);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 12px;
}
.edition-badge-tag.gold {
    background: var(--gold-soft);
    color: var(--gold-dark);
}
.edition-badge-tag.current {
    background: var(--gold);
    color: var(--navy);
}
.edition-card h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 10px;
}
.edition-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}
.edition-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 18px;
    font-size: 0.8rem;
    color: var(--text-muted);
}
.edition-stats span {
    background: var(--bg-secondary);
    padding: 4px 12px;
    border-radius: 16px;
}
.edition-current {
    border-color: var(--gold);
    background: linear-gradient(135deg, #fffdf8, #faf3e8);
}

/* ========== TIMELINE ========== */
.timeline {
    background: var(--bg-secondary);
}
.timeline-container {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}
.timeline-container::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, transparent, var(--navy), var(--gold), var(--coral), var(--teal), transparent);
    transform: translateX(-50%);
    border-radius: 3px;
}
.timeline-item {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 30px 0;
    position: relative;
    width: 50%;
    padding-right: 50px;
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.6s ease;
}
.timeline-item.visible {
    opacity: 1;
    transform: translateX(0);
}
.timeline-item:nth-child(even) {
    justify-content: flex-start;
    align-self: flex-end;
    padding-right: 0;
    padding-left: 50px;
    transform: translateX(30px);
}
.timeline-item:nth-child(even).visible {
    transform: translateX(0);
}
.timeline-dot {
    position: absolute;
    right: -11px;
    top: 50%;
    transform: translateY(-50%);
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 4px solid var(--bg-secondary);
    z-index: 2;
    box-shadow: 0 0 16px rgba(0, 0, 0, 0.15);
}
.timeline-item:nth-child(1) .timeline-dot {
    background: var(--navy);
}
.timeline-item:nth-child(2) .timeline-dot {
    background: var(--gold);
}
.timeline-item:nth-child(3) .timeline-dot {
    background: var(--coral);
}
.timeline-item:nth-child(4) .timeline-dot {
    background: var(--teal);
}
.timeline-item:nth-child(even) .timeline-dot {
    right: auto;
    left: -11px;
}
.timeline-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 28px 30px;
    transition: all var(--transition);
    cursor: pointer;
    width: 100%;
    transform-style: preserve-3d;
    will-change: transform;
    box-shadow: var(--shadow-sm);
}
.timeline-card:hover {
    border-color: var(--border-gold);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}
.timeline-date {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--navy);
    letter-spacing: 1px;
    margin-bottom: 8px;
}
.timeline-card h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}
.timeline-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ========== SYSTEM ========== */
.system-section {
    background: var(--bg-tertiary);
    padding: 100px 60px;
    position: relative;
    overflow: hidden;
}
.system-section::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(212, 168, 83, 0.04) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}
.system-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -15%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(26, 58, 92, 0.04) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.system-intro {
    max-width: 820px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}
.system-intro .section-label {
    background: rgba(26, 58, 92, 0.08);
}
.system-intro .section-title {
    margin-bottom: 18px;
}
.system-intro .section-subtitle {
    max-width: 700px;
    margin: 0 auto 40px;
    font-size: 1.05rem;
}

.intro-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px 28px;
    margin-top: 20px;
}
.intro-actions .btn-primary {
    background: var(--navy);
    color: #fff;
}
.intro-actions .btn-primary:hover {
    background: var(--navy-light);
}
.intro-actions .btn-secondary {
    border-color: var(--gold);
    color: var(--gold-dark);
}
.intro-actions .btn-secondary:hover {
    background: var(--gold);
    color: #fff;
    border-color: var(--gold);
}
.manual-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px 24px;
    margin-top: 32px;
}
.manual-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: 40px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-decoration: none;
    transition: all var(--transition);
    font-family: var(--font-body);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(4px);
}
.manual-link:hover {
    border-color: var(--gold);
    color: var(--gold-dark);
    background: var(--gold-soft);
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
}
.manual-link .icon {
    font-size: 1.1rem;
}
.manual-link.admin {
    border-color: var(--navy-light);
    color: var(--navy-light);
}
.manual-link.admin:hover {
    background: var(--navy-soft);
    border-color: var(--navy);
    color: var(--navy);
}

/* ========== DOWNLOAD ========== */
.download-section {
    background: linear-gradient(135deg, var(--bg-primary) 0%, #fdf6e8 100%);
    padding: 100px 60px;
    position: relative;
    overflow: hidden;
}
.download-section::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(212, 168, 83, 0.06) 0%, transparent 60%);
    border-radius: 50%;
    pointer-events: none;
}
.download-section::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(26, 58, 92, 0.05) 0%, transparent 60%);
    border-radius: 50%;
    pointer-events: none;
}

.download-header {
    text-align: center;
    margin-bottom: 50px;
    position: relative;
    z-index: 1;
}
.download-header .section-label {
    background: rgba(26, 58, 92, 0.08);
}
.download-header .section-divider {
    margin-left: auto;
    margin-right: auto;
}
.download-header .section-title {
    margin-bottom: 12px;
}
.download-header .section-subtitle {
    max-width: 620px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.android-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 20px 6px 16px;
    border-radius: 30px;
    background: rgba(26, 58, 92, 0.08);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--navy);
    letter-spacing: 0.5px;
    margin-bottom: 16px;
    border: 1px solid rgba(26, 58, 92, 0.12);
}
.android-badge .icon {
    font-size: 1.2rem;
}

.download-split {
    display: flex;
    align-items: stretch;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    min-height: 200px;
}

.download-half {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px 20px;
    text-align: center;
}

.download-half:first-child {
    padding-right: 40px;
}
.download-half:last-child {
    padding-left: 40px;
}

.divider-line {
    width: 2px;
    background: linear-gradient(to bottom, transparent, var(--gold), var(--navy), var(--gold), transparent);
    flex-shrink: 0;
    margin: 20px 0;
    border-radius: 2px;
}

.download-half .app-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    line-height: 1;
    color: var(--navy);
}
.download-half .app-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--navy);
    letter-spacing: 0.5px;
    margin-bottom: 20px;
}

.download-btn-simple {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 32px;
    border-radius: 40px;
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-decoration: none;
    transition: all var(--transition);
    font-family: var(--font-body);
    border: none;
    cursor: pointer;
    background: var(--navy);
    color: #fff;
    box-shadow: var(--shadow-navy);
}
.download-btn-simple:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(26, 58, 92, 0.25);
    background: var(--navy-light);
}
.download-btn-simple.gold {
    background: var(--gold);
    color: var(--navy);
    box-shadow: var(--shadow-gold);
}
.download-btn-simple.gold:hover {
    background: var(--gold-light);
    box-shadow: 0 12px 32px rgba(212, 168, 83, 0.35);
}
.download-btn-simple .icon {
    font-size: 1.1rem;
}

.download-note {
    text-align: center;
    margin-top: 40px;
    font-size: 0.85rem;
    color: var(--text-muted);
    position: relative;
    z-index: 1;
}
.download-note .icon {
    margin-right: 6px;
}
.download-note strong {
    color: var(--navy);
    font-weight: 600;
}

/* ========== FAQ ========== */
.faq {
    background: var(--bg-primary);
}
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 4px;
}
.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 20px 0;
    background: none;
    border: none;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    color: var(--navy);
    cursor: pointer;
    text-align: left;
    transition: color var(--transition);
}
.faq-question:hover {
    color: var(--gold-dark);
}
.faq-question i {
    transition: transform var(--transition);
    color: var(--text-muted);
}
.faq-item.active .faq-question i {
    transform: rotate(180deg);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}
.faq-item.active .faq-answer {
    max-height: 300px;
    padding-bottom: 20px;
}
.faq-answer p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin: 0;
}

/* ========== PARTNERS ========== */
.partners {
    background: var(--bg-secondary);
    padding: 80px 60px;
}
.partners-scroll {
    overflow: hidden;
    position: relative;
    mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
}
.partners-track {
    display: flex;
    gap: 30px;
    animation: scroll-partners 25s linear infinite;
    width: max-content;
}
.partners-track:hover {
    animation-play-state: paused;
}
@keyframes scroll-partners {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}
.partner-logo {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 2px;
    white-space: nowrap;
    padding: 15px 25px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-card);
    transition: all var(--transition);
    cursor: default;
    user-select: none;
}
.partner-logo:hover {
    color: var(--navy);
    border-color: var(--gold);
    background: #fff;
    box-shadow: var(--shadow-sm);
}

/* ========== CTA ========== */
.cta-section {
    background: linear-gradient(135deg, #1a3a5c 0%, #2c5282 40%, #d4a853 100%);
    text-align: center;
    padding: 120px 60px;
    position: relative;
    overflow: hidden;
}
.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}
.cta-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
    letter-spacing: 2px;
}
.cta-title .gold {
    color: var(--gold-light);
}
.cta-desc {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.85);
    max-width: 550px;
    margin: 0 auto 40px;
    line-height: 1.8;
}
.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}
.cta-section .btn-primary {
    background: #fff;
    color: var(--navy);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}
.cta-section .btn-primary:hover {
    background: var(--gold-light);
    color: var(--navy);
}
.cta-section .btn-secondary {
    border-color: rgba(255, 255, 255, 0.6);
    color: #fff;
}
.cta-section .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: #fff;
}
.cta-deadline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 35px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 1px;
}
.cta-deadline .dot {
    width: 8px;
    height: 8px;
    background: #ff6b6b;
    border-radius: 50%;
    animation: blink 1.5s infinite;
}
@keyframes blink {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.2;
    }
}

/* ========== 报名表单样式 ========== */
.cta-form-container {
    display: none;
    max-width: 700px;
    margin: 0 auto;
    background: rgba(255,255,255,0.95);
    border-radius: 24px;
    padding: 40px 35px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
    backdrop-filter: blur(8px);
}
.cta-form-card {
    text-align: left;
}
.form-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}
.form-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--navy);
    margin: 0;
}
.form-subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 4px 0 0;
    width: 100%;
}
.form-back-btn {
    background: none;
    border: none;
    color: var(--navy);
    font-weight: 600;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
}
.form-back-btn:hover {
    color: var(--gold-dark);
}
.form-group {
    margin-bottom: 24px;
}
.form-group label {
    display: block;
    font-weight: 600;
    color: var(--navy);
    margin-bottom: 6px;
    font-size: 0.95rem;
}
.required {
    color: #e74c3c;
}
.form-group input[type="text"] {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.95rem;
    transition: border-color 0.2s;
}
.form-group input[type="text"]:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(212,168,83,0.15);
}
.radio-group {
    display: flex;
    gap: 30px;
    margin-top: 6px;
}
.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    cursor: pointer;
}
.radio-label input[type="radio"] {
    display: none;
}
.radio-custom {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: inline-block;
    position: relative;
    transition: border-color 0.2s;
}
.radio-label input[type="radio"]:checked + .radio-custom::after {
    content: '';
    width: 10px;
    height: 10px;
    background: var(--gold);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.radio-label input[type="radio"]:checked + .radio-custom {
    border-color: var(--gold);
}

.team-group {
    border-top: 1px dashed var(--border-color);
    padding-top: 20px;
}
.team-hint, .contact-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}
.team-member-card {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--bg-secondary);
    padding: 12px 16px;
    border-radius: 12px;
    margin-bottom: 10px;
}
.member-fields {
    flex: 1;
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
.member-field {
    flex: 1 1 200px;
}
.member-field input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9rem;
}
.member-remove-btn {
    background: none;
    border: none;
    color: #e74c3c;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: background 0.2s;
}
.member-remove-btn:hover:not(:disabled) {
    background: rgba(231,76,60,0.1);
}
.member-remove-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}
.member-add-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: 1px dashed var(--border-color);
    padding: 8px 18px;
    border-radius: 30px;
    color: var(--navy);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}
.member-add-btn:hover {
    border-color: var(--gold);
    background: var(--gold-soft);
}
.contact-grid {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
.contact-item {
    flex: 1 1 160px;
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-secondary);
    padding: 0 12px;
    border-radius: 10px;
}
.contact-item i {
    color: var(--navy-light);
    font-size: 1.1rem;
}
.contact-item input {
    border: none;
    background: transparent;
    padding: 10px 0;
    width: 100%;
    font-size: 0.95rem;
}
.contact-item input:focus {
    outline: none;
}
.form-error {
    color: #e74c3c;
    font-size: 0.8rem;
    margin-top: 6px;
    display: none;
}
.form-actions {
    display: flex;
    gap: 16px;
    margin-top: 30px;
    flex-wrap: wrap;
}
.btn-submit {
    padding: 14px 40px;
    background: var(--navy);
    color: #fff;
    border: none;
    border-radius: 40px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}
.btn-submit:hover:not(:disabled) {
    background: var(--navy-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-navy);
}
.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}
.btn-reset {
    padding: 14px 30px;
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: 40px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}
.btn-reset:hover {
    border-color: var(--navy);
    color: var(--navy);
}
.form-success {
    text-align: center;
    padding: 40px 20px;
}
.success-icon {
    font-size: 4rem;
    margin-bottom: 16px;
}
.form-success h4 {
    font-size: 1.8rem;
    color: var(--navy);
    margin-bottom: 10px;
}
.form-success p {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

/* ========== FOOTER ========== */
.footer {
    background: var(--navy-dark);
    padding: 60px 60px 30px;
    border-top: 1px solid var(--border-color);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 40px;
}
.footer-brand h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--gold-light);
    letter-spacing: 2px;
    margin-bottom: 16px;
}
.footer-brand p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
    max-width: 350px;
}
.footer-col h4 {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 16px;
}
.footer-col ul {
    list-style: none;
}
.footer-col ul li {
    margin-bottom: 10px;
}
.footer-col ul li a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition);
}
.footer-col ul li a:hover {
    color: var(--gold-light);
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}
.footer-bottom p {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.4);
}
.footer-social {
    display: flex;
    gap: 15px;
}
.footer-social a {
    width: 36px;
    height: 36px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    font-size: 0.8rem;
    transition: all var(--transition);
}
.footer-social a:hover {
    border-color: var(--gold-light);
    color: var(--gold-light);
    background: rgba(212, 168, 83, 0.15);
    transform: translateY(-2px);
}

/* ========== 备案信息 ========== */
.footer-bottom-left {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.footer-copyright {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.4);
    margin: 0;
}
.footer-legal {
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.35);
    margin: 0;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px 8px;
}
.footer-legal a {
    color: rgba(255, 255, 255, 0.35);
    text-decoration: none;
    transition: color var(--transition), background var(--transition);
    padding: 2px 6px;
    border-radius: 4px;
}
.footer-legal a:hover {
    color: var(--gold-light);
    background: rgba(212, 168, 83, 0.08);
}
.footer-badge-icon {
    height: 16px;
    width: auto;
    vertical-align: middle;
    margin-right: 4px;
}
.footer-legal .sep {
    color: rgba(255, 255, 255, 0.2);
    font-weight: 300;
    margin: 0 2px;
}

/* ========== BACK TO TOP ========== */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--navy);
    color: #fff;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 100;
    box-shadow: var(--shadow-navy);
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}
.back-to-top:hover {
    transform: translateY(-4px);
    background: var(--gold);
    color: var(--navy);
    box-shadow: var(--shadow-gold);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    section {
        padding: 80px 40px;
    }
    .hero {
        padding: 100px 40px 70px;
    }
    .navbar {
        padding: 15px 40px;
    }
    .navbar.scrolled {
        padding: 10px 40px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .about-visual {
        order: -1;
    }
    .about-visual-ring {
        width: 280px;
        height: 280px;
    }
    .editions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 14px 20px;
    }
    .navbar.scrolled {
        padding: 10px 20px;
    }
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: rgba(250, 248, 245, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        gap: 30px;
        transition: right 0.4s ease;
        border-left: 1px solid var(--border-color);
    }
    .nav-links.active {
        right: 0;
    }
    .nav-links a {
        font-size: 1.1rem;
        color: var(--navy);
    }
    .hamburger {
        display: flex;
    }
    .nav-cta {
        display: none;
    }
    .nav-edition-badge {
        font-size: 0.5rem;
        padding: 1px 8px;
    }
    section {
        padding: 60px 20px;
    }
    .hero {
        padding: 100px 20px 60px;
        background-position: center center;
        background-size: cover;
    }
    .hero-title {
        font-size: clamp(2.8rem, 10vw, 4rem);
    }
    .countdown-grid {
        gap: 10px;
    }
    .countdown-item {
        min-width: 50px;
        padding: 8px 10px;
    }
    .countdown-item .num {
        font-size: 1.5rem;
    }
    .timeline-container::before {
        left: 0;
    }
    .timeline-item,
    .timeline-item:nth-child(even) {
        width: 100%;
        justify-content: flex-start;
        padding-left: 40px;
        padding-right: 0;
        transform: translateX(20px);
    }
    .timeline-item.visible,
    .timeline-item:nth-child(even).visible {
        transform: translateX(0);
    }
    .timeline-dot,
    .timeline-item:nth-child(even) .timeline-dot {
        right: auto;
        left: -11px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    .footer {
        padding: 40px 20px 20px;
    }
    .cta-section {
        padding: 80px 20px;
    }
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }
    .about-visual-ring {
        width: 220px;
        height: 220px;
    }
    .about-visual-center .big-num {
        font-size: 3rem;
    }
    .ticker-item {
        font-size: 0.7rem;
        padding: 4px 10px;
    }
    .download-section {
        padding: 60px 20px;
    }
    .editions-grid {
        grid-template-columns: 1fr;
    }
    .download-split {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }
    .divider-line {
        width: 60%;
        height: 2px;
        background: linear-gradient(to right, transparent, var(--gold), var(--navy), var(--gold), transparent);
        margin: 4px 0;
        flex-shrink: 0;
    }
    .download-half {
        padding: 20px 10px !important;
        width: 100%;
    }
    .download-half .app-name {
        font-size: 1.15rem;
    }
    .download-btn-simple {
        padding: 10px 28px;
        font-size: 0.85rem;
    }
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    .footer-bottom-left {
        width: 100%;
    }
    .footer-legal {
        flex-wrap: wrap;
    }
    .footer-legal .sep {
        display: none;
    }
    .footer-legal a {
        display: block;
        padding: 2px 0;
    }
    .footer-badge-icon {
        height: 14px;
    }

    /* 表单移动端适配 */
    .cta-form-container {
        padding: 24px 16px;
    }
    .form-title {
        font-size: 1.4rem;
    }
    .radio-group {
        flex-direction: column;
        gap: 12px;
    }
    .contact-grid {
        flex-direction: column;
    }
    .contact-item {
        flex: 1 1 auto;
    }
    .form-actions {
        flex-direction: column;
    }
    .btn-submit,
    .btn-reset {
        width: 100%;
        justify-content: center;
    }

    /* loader 移动端适配 */
    .loader-icon img {
        width: 72px;
    }
    .loader-title {
        font-size: 1.2rem;
        letter-spacing: 2px;
        margin-bottom: 20px;
    }
    .loader-hint {
        font-size: 0.75rem;
        padding-top: 16px;
    }
    .loader-progress-wrap {
        gap: 12px;
        margin-bottom: 18px;
    }
    .loader-progress-text {
        font-size: 0.8rem;
        min-width: 36px;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 0.9rem;
    }
    .navbar {
        padding: 10px 16px;
    }
    .navbar.scrolled {
        padding: 8px 16px;
    }
    .nav-logo {
        font-size: 1.2rem;
        gap: 6px;
    }
    .nav-edition-badge {
        font-size: 0.45rem;
        padding: 1px 6px;
    }
    .nav-links a {
        font-size: 1rem;
    }
    .hero {
        padding: 80px 16px 50px;
        min-height: 90vh;
    }
    .hero-badge {
        font-size: 0.65rem;
        padding: 4px 14px;
        margin-bottom: 16px;
    }
    .hero-title {
        font-size: clamp(2.2rem, 9vw, 3rem);
        letter-spacing: 2px;
    }
    .hero-subtitle {
        font-size: 0.9rem;
    }
    .hero-desc {
        font-size: 0.85rem;
        margin-bottom: 24px;
    }
    .hero-buttons {
        gap: 12px;
    }
    .btn-primary,
    .btn-secondary {
        padding: 12px 20px;
        font-size: 0.8rem;
        width: 100%;
        text-align: center;
    }
    .hero-countdown {
        margin-top: 24px;
    }
    .countdown-label {
        font-size: 0.7rem;
    }
    .countdown-grid {
        gap: 6px;
    }
    .countdown-item {
        min-width: 40px;
        padding: 4px 8px;
        border-radius: 8px;
    }
    .countdown-item .num {
        font-size: 1.2rem;
    }
    .countdown-item .label {
        font-size: 0.5rem;
    }
    section {
        padding: 40px 16px;
    }
    .section-label {
        font-size: 0.6rem;
        padding: 4px 10px;
        margin-bottom: 10px;
    }
    .section-title {
        font-size: clamp(1.5rem, 5vw, 2rem);
        margin-bottom: 12px;
    }
    .section-subtitle {
        font-size: 0.85rem;
        margin-bottom: 30px;
    }
    .section-divider {
        width: 50px;
        height: 3px;
        margin-bottom: 18px;
    }
    .about-features {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    .about-feature {
        padding: 16px;
    }
    .about-feature-icon {
        font-size: 1.4rem;
    }
    .about-feature h4 {
        font-size: 0.9rem;
    }
    .about-feature p {
        font-size: 0.75rem;
    }
    .about-visual-ring {
        width: 160px;
        height: 160px;
    }
    .about-visual-ring::before {
        inset: -12px;
    }
    .about-visual-center .big-num {
        font-size: 2.2rem;
    }
    .about-visual-center .big-label {
        font-size: 0.6rem;
    }
    .editions-grid {
        gap: 16px;
    }
    .edition-card {
        padding: 20px 16px;
    }
    .edition-card .edition-year {
        font-size: 1.8rem;
    }
    .edition-card h4 {
        font-size: 1.1rem;
    }
    .edition-card p {
        font-size: 0.8rem;
    }
    .edition-stats {
        font-size: 0.7rem;
        gap: 6px 10px;
    }
    .edition-stats span {
        padding: 2px 8px;
    }
    .timeline-item {
        padding: 16px 0 16px 30px;
    }
    .timeline-card {
        padding: 16px 18px;
    }
    .timeline-date {
        font-size: 0.85rem;
    }
    .timeline-card h4 {
        font-size: 0.95rem;
    }
    .timeline-card p {
        font-size: 0.75rem;
    }
    .timeline-dot {
        width: 16px;
        height: 16px;
        border-width: 3px;
        left: -8px !important;
    }
    .timeline-container::before {
        left: 0;
    }
    .system-section {
        padding: 50px 16px;
    }
    .system-intro .section-subtitle {
        font-size: 0.9rem;
    }
    .intro-actions {
        flex-direction: column;
        gap: 10px;
        align-items: center;
    }
    .intro-actions .btn-primary,
    .intro-actions .btn-secondary {
        width: 100%;
        text-align: center;
        padding: 12px 20px;
        font-size: 0.8rem;
    }
    .manual-links {
        flex-direction: column;
        align-items: center;
        gap: 8px;
    }
    .manual-link {
        width: 100%;
        justify-content: center;
        padding: 8px 16px;
        font-size: 0.75rem;
    }
    .download-header {
        margin-bottom: 30px;
    }
    .download-header .section-title {
        font-size: 1.4rem;
    }
    .download-header .section-subtitle {
        font-size: 0.85rem;
    }
    .android-badge {
        font-size: 0.65rem;
        padding: 4px 12px;
    }
    .download-half .app-icon img {
        height: 2.2rem !important;
    }
    .download-half .app-name {
        font-size: 1rem;
        margin-bottom: 12px;
    }
    .download-btn-simple {
        padding: 8px 20px;
        font-size: 0.75rem;
        width: 100%;
        justify-content: center;
    }
    .download-note {
        font-size: 0.75rem;
        margin-top: 24px;
    }
    .faq-question {
        font-size: 0.85rem;
        padding: 14px 0;
    }
    .faq-answer p {
        font-size: 0.8rem;
    }
    .partners {
        padding: 40px 16px;
    }
    .partner-logo {
        font-size: 0.9rem;
        padding: 10px 16px;
    }
    .cta-section {
        padding: 60px 16px;
    }
    .cta-title {
        font-size: 1.8rem;
    }
    .cta-desc {
        font-size: 0.9rem;
        margin-bottom: 24px;
    }
    .cta-buttons {
        flex-direction: column;
        gap: 10px;
    }
    .cta-deadline {
        font-size: 0.7rem;
        margin-top: 20px;
    }
    .footer {
        padding: 30px 16px 16px;
    }
    .footer-brand h3 {
        font-size: 1.2rem;
    }
    .footer-brand p {
        font-size: 0.75rem;
    }
    .footer-col h4 {
        font-size: 0.75rem;
    }
    .footer-col ul li a {
        font-size: 0.75rem;
    }
    .footer-social a {
        width: 30px;
        height: 30px;
        font-size: 0.7rem;
    }
    .footer-copyright {
        font-size: 0.65rem;
    }
    .footer-legal {
        font-size: 0.65rem;
    }
    .footer-badge-icon {
        height: 12px;
    }
    .hero-scroll-indicator {
        display: none;
    }
    .about-visual-ring::before {
        display: none;
    }

    /* 表单超小屏适配 */
    .cta-form-container {
        padding: 16px 12px;
    }
    .form-title {
        font-size: 1.2rem;
    }
    .form-back-btn {
        font-size: 0.8rem;
    }
    .team-member-card {
        flex-wrap: wrap;
        padding: 12px;
    }
    .member-fields {
        flex-direction: column;
        gap: 8px;
        width: 100%;
    }
    .member-field {
        flex: 1 1 auto;
        width: 100%;
    }
    .member-remove-btn {
        align-self: flex-end;
    }

    /* loader 超小屏适配 */
    .loader-icon img {
        width: 60px;
    }
    .loader-title {
        font-size: 1rem;
        letter-spacing: 1px;
        margin-bottom: 16px;
    }
    .loader-hint {
        font-size: 0.7rem;
        padding-top: 14px;
    }
    .loader-progress-wrap {
        gap: 10px;
        margin-bottom: 14px;
    }
    .loader-progress-track {
        height: 4px;
    }
    .loader-progress-text {
        font-size: 0.7rem;
        min-width: 32px;
    }
}