/* ============================================================
   欢迎落地页 · 现代简约主题（首页专用）
   - 移植自 welcome.html v2，改为外链模块化文件
   - 玻璃拟态 / 超大标题 / 微交互 / 数据可视化
   - 全部主题色由 :root CSS 变量驱动，深/浅色模式一键切换
   - 自定义光标样式见共享的 css/cursor.css
   ============================================================ */

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

:root {
    /* 深色主题（默认） */
    --bg-0: #070b12;
    --bg-1: #0c1320;
    --accent: #22d3ee;
    --accent-2: #6366f1;
    --text: #e6edf3;
    --text-dim: #8b98a9;
    --border: rgba(34, 211, 238, .22);
    --accent-weak: rgba(34, 211, 238, .06);

    --bg-glow-1: rgba(99, 102, 241, .18);
    --bg-glow-2: rgba(34, 211, 238, .14);
    --title-from: #f0f6fb;
    --btn-text: #04121a;

    --panel: rgba(9, 14, 22, .72);
    --panel-bar: rgba(15, 23, 34, .9);
    --panel-line: rgba(139, 152, 169, .18);
    --term-text: #9fb2c7;
    --term-title: #5f6e7e;
    --ok: #34d399;

    --card-bg: rgba(255, 255, 255, .03);
    --card-line: rgba(139, 152, 169, .14);
    --card-glow: rgba(34, 211, 238, .12);
    --tag-line: rgba(139, 152, 169, .22);

    --divider-line: rgba(139, 152, 169, .12);
    --nav-bg: rgba(7, 11, 18, .55);
    --foot: #56677c;
    --noise-dot: rgba(255, 255, 255, .035);
    --scrollbar-track: #070b12;

    /* 自定义光标配色（cursor.css 消费） */
    --cursor-ring: rgba(34, 211, 238, .55);
    --cursor-ring-hover: rgba(99, 102, 241, .8apse);

    --btn-primary-shadow: rgba(34, 211, 238, .28);
    --btn-primary-shadow-hover: rgba(34, 211, 238, .45);
    --btn-ghost-shadow-hover: rgba(34, 211, 238, .12);

    --font-display: "Space Grotesk", "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-body: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
    --font-mono: "Cascadia Code", Consolas, monospace;
}

/* ========== 浅色主题：一键换肤（仅覆盖变量） ========== */
@media (prefers-color-scheme: light) {
    :root {
        --bg-0: #faf8f5;
        --bg-1: #f3ede2;
        --accent: #a98a63;
        --accent-2: #8a6a4b;
        --text: #4a3f35;
        --text-dim: #8a7a68;
        --border: rgba(169, 138, 99, .45);
        --accent-weak: rgba(169, 138, 99, .08);

        --bg-glow-1: rgba(169, 138, 99, .14);
        --bg-glow-2: rgba(138, 106, 75, .10);
        --title-from: #4a3f35;
        --btn-text: #fff;

        --panel: rgba(255, 255, 255, .62);
        --panel-bar: rgba(246, 239, 228, .92);
        --panel-line: rgba(200, 169, 126, .45);
        --term-text: #5d5244;
        --term-title: #a98a63;
        --ok: #2f855a;

        --card-bg: rgba(255, 255, 255, .6);
        --card-line: rgba(200, 169, 126, .35);
        --card-glow: rgba(169, 138, 99, .12);
        --tag-line: rgba(169, 138, 99, .35);

        --divider-line: rgba(200, 169, 126, .25);
        --nav-bg: rgba(250, 248, 245, .6);
        --foot: #b7a689;
        --noise-dot: rgba(169, 138, 99, .10);
        --scrollbar-track: #f3ede2;

        --cursor-ring: rgba(169, 138, 99, .55);
        --cursor-ring-hover: rgba(138, 106, 75, .8);

        --btn-primary-shadow: rgba(138, 106, 75, .28);
        --btn-primary-shadow-hover: rgba(138, 106, 75, .4);
        --btn-ghost-shadow-hover: rgba(138, 106, 75, .18);
    }
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    color: var(--text);
    background:
        radial-gradient(1200px 700px at 12% -10%, var(--bg-glow-1), transparent 60%),
        radial-gradient(1000px 700px at 90% 10%, var(--bg-glow-2), transparent 55%),
        linear-gradient(160deg, var(--bg-1), var(--bg-0) 60%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ========== 自定义滚动条（与主题统一） ========== */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--scrollbar-track); }
::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--accent-2), var(--accent));
    border-radius: 6px;
    border: 2px solid var(--scrollbar-track);
}

/* ========== 尊重系统"减弱动态"偏好 ========== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }
}

/* ========== 粒子背景画布 ========== */
#bg-canvas {
    position: fixed; inset: 0; z-index: 0; pointer-events: none;
}

/* 噪点颗粒层 */
body::before {
    content: "";
    position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: .5;
    background-image: radial-gradient(var(--noise-dot) 1px, transparent 1px);
    background-size: 34px 34px;
}

/* ========== 顶部滚动进度条 ========== */
#scroll-progress {
    position: fixed; top: 0; left: 0; height: 3px; width: 0%;
    z-index: 9000;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    box-shadow: 0 0 12px var(--btn-primary-shadow);
}

/* ========== 顶部导航（玻璃拟态） ========== */
.nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 8000;
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px clamp(18px, 4vw, 46px);
    background: var(--nav-bg);
    backdrop-filter: blur(14px);               /* 玻璃拟态：毛玻璃吸顶 */
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--divider-line);
    opacity: 0; animation: fadeDown .8s .05s ease forwards;
}
.nav .logo {
    font-family: var(--font-display);
    font-weight: 600; letter-spacing: 3px; font-size: .95rem;
    color: var(--text);
}
.nav .logo b { color: var(--accent); }
.nav .cta-sm {
    font-size: .82rem; letter-spacing: 1px; text-decoration: none;
    padding: 8px 18px; border-radius: 30px;
    border: 1px solid var(--border);
    color: var(--accent); background: var(--accent-weak);
    transition: all .25s ease;
}
.nav .cta-sm:hover {
    background: var(--accent); color: var(--btn-text);
    box-shadow: 0 6px 18px var(--btn-primary-shadow);
}

@keyframes fadeDown {
    from { opacity: 0; transform: translateY(-16px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ========== 主舞台（首屏） ========== */
.stage {
    position: relative; z-index: 1;
    min-height: 100vh; min-height: 100dvh;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    text-align: center; padding: 88px 20px 64px;
}

.badge {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 7px 16px; border: 1px solid var(--border);
    border-radius: 30px; color: var(--accent);
    font-size: .82rem; letter-spacing: 2px;
    background: var(--accent-weak);
    opacity: 0; animation: riseIn .8s .1s ease forwards;
}
.badge .dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--accent); box-shadow: 0 0 10px var(--accent);
    animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

/* 超大号标题：渐变霓虹字（Oversized Typography 趋势） */
h1 {
    font-family: var(--font-display);
    font-size: clamp(3rem, 10vw, 6.2rem);
    letter-spacing: 4px; line-height: 1.08;
    margin: 20px 0 8px;
    background: linear-gradient(120deg, var(--title-from) 15%, var(--accent) 48%, var(--accent-2) 80%);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
    opacity: 0; animation: riseIn .9s .22s ease forwards;
}
h1 .thin {
    font-weight: 400; letter-spacing: 10px;
    display: block; margin-top: 10px;
    font-size: clamp(.95rem, 3.6vw, 1.6rem);
}

.divider {
    width: 76px; height: 2px; margin: 16px auto;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    border-radius: 2px;
    opacity: 0; animation: riseIn .8s .4s ease forwards;
}

.subtitle {
    max-width: 580px; color: var(--text-dim);
    font-size: clamp(.95rem, 3.2vw, 1.08rem);
    line-height: 1.9; letter-spacing: 1px;
    opacity: 0; animation: riseIn .8s .55s ease forwards;
}
.subtitle b { color: var(--accent); font-weight: 600; }

/* 终端窗口：玻璃拟态 + 打字机 */
.term {
    margin-top: 24px; text-align: left;
    width: min(540px, 94vw);
    background: var(--panel);
    border: 1px solid var(--panel-line);
    border-radius: 12px;
    box-shadow: 0 18px 50px rgba(0, 0, 0, .5), inset 0 0 40px var(--accent-weak);
    overflow: hidden;
    opacity: 0; animation: riseIn .8s .7s ease forwards;
}
.term-bar {
    display: flex; align-items: center; gap: 7px;
    padding: 10px 14px;
    background: var(--panel-bar);
    border-bottom: 1px solid var(--panel-line);
}
.term-bar .trl { width: 11px; height: 11px; border-radius: 50%; }
.term-bar .trl:nth-child(1) { background: #ff5f57; }
.term-bar .trl:nth-child(2) { background: #febc2e; }
.term-bar .trl:nth-child(3) { background: #28c840; }
.term-bar .t-title { margin-left: 8px; color: var(--term-title); font-size: .8rem; letter-spacing: 1px; }
.term-body {
    padding: 14px 16px;
    font-family: var(--font-mono);
    font-size: .84rem; line-height: 1.9;
    color: var(--term-text); white-space: pre-wrap; word-break: break-word;
}
.term-body .ok { color: var(--ok); }
.term-body .hl { color: var(--accent); }
.term-body .cursor {
    display: inline-block; width: 9px; height: 15px; margin-left: 4px;
    vertical-align: -2px; background: var(--accent);
    animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* 按钮区 */
.actions {
    display: flex; flex-wrap: wrap; gap: 16px; justify-content: center;
    margin-top: 26px;
    opacity: 0; animation: riseIn .8s .85s ease forwards;
}
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 32px; border-radius: 40px;
    font-size: .95rem; letter-spacing: 2px; text-decoration: none;
    transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
    white-space: nowrap; border: 1px solid transparent;
    /* 磁性按钮会由 JS 施加 transform，需要 relative 定位 */
    position: relative; will-change: transform;
}
.btn-primary {
    background: linear-gradient(120deg, var(--accent), var(--accent-2));
    color: var(--btn-text); font-weight: 600;
    box-shadow: 0 8px 26px var(--btn-primary-shadow);
}
.btn-primary:hover { box-shadow: 0 14px 38px var(--btn-primary-shadow-hover); }
.btn-ghost {
    border-color: var(--tag-line);
    color: var(--text-dim); background: transparent;
}
.btn-ghost:hover {
    border-color: var(--accent); color: var(--accent);
    box-shadow: 0 10px 26px var(--btn-ghost-shadow-hover);
}

/* 滚动提示 */
.scroll-hint {
    position: absolute; bottom: 22px; left: 50%;
    transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 4px;
    color: var(--text-dim); font-size: .78rem; letter-spacing: 2px;
    opacity: 0; pointer-events: none;
    animation: riseIn 1s 1.1s ease forwards;
    transition: opacity .4s ease;
}
/* 进场动画播完后由 JS 标记 is-ready，改由过渡控制显隐（向下滚动即淡出） */
.stage.is-ready .scroll-hint {
    animation: none;
    opacity: 1;
    pointer-events: auto;
}
.stage.is-ready .scroll-hint.is-hidden {
    opacity: 0;
    pointer-events: none;
}
.scroll-hint .arrow { animation: bob 1.6s ease-in-out infinite; font-size: 1.2rem; color: var(--accent); }
@keyframes bob { 0%,100% { transform: translateY(0); } 50% { transform: translateY(7px); } }

@keyframes riseIn {
    from { opacity: 0; transform: translateY(28px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   第二区 · 数据可视化（把简历亮点量化为数字）
   ============================================================ */
.section {
    position: relative; z-index: 1;
    max-width: 1080px; margin: 0 auto;
    padding: clamp(70px, 8vw, 110px) clamp(18px, 4vw, 40px);
}
.sec-head { text-align: center; margin-bottom: clamp(30px, 4vw, 46px); }
.sec-head .kicker {
    color: var(--accent); letter-spacing: 4px; font-size: .82rem;
}
.sec-head h2 {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 5vw, 2.8rem); letter-spacing: 2px; margin-top: 10px;
}
.sec-head .divider { margin: 16px auto 0; }

/* 统计条：入场前隐藏，进入视口后逐项浮动 */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: clamp(12px, 2vw, 18px);
}
.stat {
    background: var(--card-bg);
    border: 1px solid var(--card-line);
    border-radius: 16px;
    padding: 22px 16px; text-align: center;
    opacity: 0; transform: translateY(26px);
    transition: opacity .7s ease, transform .7s ease, border-color .3s ease, background .3s ease;
}
.stat.visible { opacity: 1; transform: translateY(0); }
.stat:hover {
    border-color: var(--border);
    background: var(--accent-weak);
}
.stat .num {
    font-family: var(--font-display);
    font-size: clamp(1.9rem, 4.6vw, 2.6rem);
    font-weight: 700;
    background: linear-gradient(120deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
}
.stat .num small { font-size: .55em; font-weight: 500; }
.stat .lbl { margin-top: 8px; color: var(--text-dim); font-size: .86rem; letter-spacing: 1px; }

/* ============================================================
   第三区 · 技能 Bento 玻璃网格
   ============================================================ */
.bento {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: clamp(12px, 1.8vw, 16px);
}
/* 重点项跨两列，形成节奏感（Bento 网格趋势） */
.card { grid-column: span 2; }
.card.wide { grid-column: span 4; }

.card {
    position: relative;
    border-radius: 18px;
    padding: clamp(20px, 2.6vw, 28px);
    background: var(--card-bg);                 /* 玻璃拟态表面 */
    border: 1px solid var(--card-line);
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    overflow: hidden;
    opacity: 0; transform: translateY(30px);
    transition: opacity .7s ease, transform .7s ease, border-color .3s ease;
}
/* 悬停光晕：左上角一道霓虹光，随鼠标方位移动（微交互） */
.card::before {
    content: "";
    position: absolute; inset: 0;
    background: radial-gradient(320px circle at var(--mx, 50%) var(--my, 50%),
                var(--card-glow), transparent 55%);
    opacity: 0; transition: opacity .35s ease;
}
.card:hover::before { opacity: 1; }
.card:hover { border-color: var(--border); transform: translateY(-3px); }
.card.visible { opacity: 1; transform: translateY(0); }

.card .emoji { font-size: 1.6rem; display: block; margin-bottom: 10px; }
.card h3 {
    font-family: var(--font-display);
    font-size: 1.12rem; letter-spacing: 1px; margin-bottom: 10px;
}
.card .tags { display: flex; flex-wrap: wrap; gap: 8px; }
.card .tag {
    font-size: .8rem; padding: 4px 12px; border-radius: 30px;
    border: 1px solid var(--tag-line);
    color: var(--text-dim); letter-spacing: .5px;
    transition: all .25s ease;
}
.card .tag:hover { border-color: var(--accent); color: var(--accent); }
.card.wide .tags { gap: 10px; }

/* ============================================================
   第四区 · 最终行动号召（CTA）
   ============================================================ */
.cta {
    text-align: center;
    padding: clamp(50px, 7vw, 80px) 20px;
    border-top: 1px solid var(--divider-line);
    border-bottom: 1px solid var(--divider-line);
    opacity: 0; transform: translateY(30px);
    transition: opacity .8s ease, transform .8s ease;
}
.cta.visible { opacity: 1; transform: translateY(0); }
.cta h2 {
    font-family: var(--font-display);
    font-size: clamp(1.7rem, 5vw, 2.6rem); letter-spacing: 2px; margin-bottom: 10px;
}
.cta p { color: var(--text-dim); margin-bottom: 28px; }

/* 页脚 */
.foot {
    position: relative; z-index: 1;
    text-align: center; padding: 30px 20px 40px;
    color: var(--foot); font-size: .8rem; letter-spacing: 2px;
}
.foot .hl { color: var(--ok); }

/* 响应式：窄屏让卡片单列堆叠 */
@media (max-width: 760px) {
    .card, .card.wide { grid-column: span 4; }
}
@media (max-width: 520px) {
    .actions { gap: 10px; }
    .btn { padding: 12px 22px; font-size: .88rem; }
    .term-body { font-size: .78rem; padding: 13px 14px; }
}

/* 矮屏：进一步压缩首屏，保证"向下探索"完整可见、不与按钮重叠 */
@media (max-height: 720px) {
    .stage { padding-top: 76px; padding-bottom: 58px; }
    h1 { font-size: clamp(2.4rem, 8vw, 4.6rem); margin: 14px 0 6px; }
    h1 .thin { margin-top: 6px; }
    .divider { margin: 12px auto; }
    .subtitle { line-height: 1.8; }
    .term { margin-top: 16px; }
    .term-body { padding: 11px 14px; line-height: 1.8; }
    .actions { margin-top: 18px; }
}