:root {
    --bg: #0b1020;
    --bg-soft: rgba(13, 19, 38, 0.72);
    --card: rgba(18, 26, 48, 0.78);
    --card-strong: rgba(24, 34, 60, 0.92);
    --text: #f4f7fb;
    --muted: #b7c2d6;
    --line: rgba(255, 255, 255, 0.12);
    --accent: #7ce7c4;
    --accent-2: #78a9ff;
    --accent-3: #ffb36b;
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
    --radius: 24px;
}

[data-theme="light"] {
    --bg: #f4f7fb;
    --bg-soft: rgba(255, 255, 255, 0.76);
    --card: rgba(255, 255, 255, 0.86);
    --card-strong: rgba(255, 255, 255, 0.96);
    --text: #132033;
    --muted: #50627d;
    --line: rgba(19, 32, 51, 0.09);
    --shadow: 0 24px 60px rgba(32, 49, 74, 0.12);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(120, 169, 255, 0.24), transparent 30%),
        radial-gradient(circle at top right, rgba(124, 231, 196, 0.18), transparent 26%),
        linear-gradient(180deg, var(--bg), color-mix(in srgb, var(--bg) 86%, #000 14%));
    min-height: 100vh;
    overflow-x: hidden;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5), transparent 80%);
    opacity: 0.45;
}

a {
    color: inherit;
    text-decoration: none;
}

.page {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding-bottom: 48px;
}

.progress {
    position: fixed;
    inset: 0 0 auto 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
    transform-origin: left;
    transform: scaleX(0);
    z-index: 1000;
}

.topbar {
    position: sticky;
    top: 16px;
    z-index: 200;
    margin-top: 16px;
    padding: 14px 18px;
    border: 1px solid var(--line);
    background: var(--bg-soft);
    backdrop-filter: blur(18px);
    border-radius: 999px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: "Noto Serif SC", "Times New Roman", serif;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    color: #08111f;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    box-shadow: 0 12px 30px rgba(120, 169, 255, 0.35);
}

.nav {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.nav a,
.button,
.theme-toggle {
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 10px 14px;
    transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, color 180ms ease;
}

.nav a:hover,
.button:hover,
.theme-toggle:hover {
    transform: translateY(-1px);
}

.nav a {
    color: var(--muted);
}

.nav a:hover,
.nav a[aria-current="page"] {
    color: var(--text);
    border-color: var(--line);
    background: rgba(255, 255, 255, 0.05);
}

.theme-toggle {
    cursor: pointer;
    color: var(--text);
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--line);
}

.hero {
    padding: 76px 0 34px;
    display: grid;
    grid-template-columns: 1.25fr 0.85fr;
    gap: 28px;
    align-items: stretch;
}

.hero-copy,
.hero-panel,
.section-card,
.contact-card,
.footer {
    border: 1px solid var(--line);
    background: var(--card);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow);
}

.hero-copy {
    border-radius: calc(var(--radius) + 10px);
    padding: 40px;
    position: relative;
    overflow: hidden;
}

.hero-copy::after {
    content: "";
    position: absolute;
    right: -80px;
    top: -80px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(124, 231, 196, 0.16), transparent 68%);
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--muted);
    font-size: 0.95rem;
}

h1,
h2,
h3 {
    margin: 0;
    line-height: 1.1;
    font-family: "Noto Serif SC", "Times New Roman", serif;
}

h1 {
    font-size: clamp(2.8rem, 7vw, 5.4rem);
    letter-spacing: -0.04em;
    margin-top: 18px;
}

.lead {
    margin: 22px 0 0;
    max-width: 62ch;
    font-size: 1.08rem;
    line-height: 1.9;
    color: var(--muted);
}

.actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 28px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
    font-weight: 600;
    min-height: 46px;
}

.button.primary {
    color: #08111f;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    box-shadow: 0 14px 30px rgba(120, 169, 255, 0.28);
}

.button.secondary {
    color: var(--text);
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--line);
}

.hero-panel {
    border-radius: calc(var(--radius) + 10px);
    padding: 28px;
    display: grid;
    gap: 18px;
}

.portrait {
    min-height: 260px;
    border-radius: 24px;
    padding: 26px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background:
        linear-gradient(180deg, rgba(120, 169, 255, 0.22), rgba(124, 231, 196, 0.1)),
        radial-gradient(circle at top right, rgba(255, 179, 107, 0.26), transparent 36%);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.avatar {
    width: 92px;
    height: 92px;
    border-radius: 28px;
    display: grid;
    place-items: center;
    font-size: 2rem;
    font-weight: 800;
    color: #08111f;
    background: linear-gradient(135deg, #f4f7fb, #c8e6ff);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.portrait strong {
    font-size: 1.15rem;
}

.portrait p {
    margin: 8px 0 0;
    color: var(--muted);
    line-height: 1.8;
}

.quick-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.quick-item {
    padding: 16px;
    border-radius: 18px;
    border: 1px solid var(--line);
    background: var(--card-strong);
}

.quick-item span {
    display: block;
    color: var(--muted);
    font-size: 0.92rem;
    margin-bottom: 8px;
}

.quick-item strong {
    font-size: 1.15rem;
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-top: 24px;
}

.stat {
    padding: 18px;
    border-radius: 20px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
}

.stat strong {
    display: block;
    font-size: 1.5rem;
    margin-bottom: 6px;
}

.stat span {
    color: var(--muted);
}

.section {
    padding: 34px 0 8px;
}

.section-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 18px;
}

.section-head p {
    max-width: 62ch;
    margin: 0;
    color: var(--muted);
    line-height: 1.8;
}

.section-card,
.contact-card {
    border-radius: calc(var(--radius) + 6px);
    padding: 28px;
}

.about-grid,
.project-grid,
.contact-grid {
    display: grid;
    gap: 18px;
}

.about-grid {
    grid-template-columns: 1.05fr 0.95fr;
}

.project-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.contact-grid {
    grid-template-columns: 1.1fr 0.9fr;
}

.about-list,
.timeline,
.project-list,
.contact-list {
    display: grid;
    gap: 14px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.about-list li,
.timeline li,
.project-card,
.contact-card,
.skill-card {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
}

.about-list li,
.timeline li {
    border-radius: 20px;
    padding: 18px;
}

.timeline li strong,
.project-card h3 {
    display: block;
    margin-bottom: 8px;
}

.about-list p,
.timeline p,
.project-card p,
.contact-card p {
    margin: 0;
    color: var(--muted);
    line-height: 1.8;
}

.skill-bars {
    display: grid;
    gap: 16px;
}

.skill-card {
    border-radius: 20px;
    padding: 18px;
}

.skill-card .row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
}

.meter {
    height: 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    overflow: hidden;
}

.meter > span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.project-card {
    border-radius: 24px;
    padding: 22px;
    display: flex;
    flex-direction: column;
    min-height: 100%;
    gap: 14px;
}

.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 0.88rem;
    color: var(--muted);
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.03);
}

.project-foot {
    margin-top: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    color: var(--muted);
}

form {
    display: grid;
    gap: 14px;
}

label {
    display: grid;
    gap: 8px;
    font-weight: 600;
}

input,
textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    padding: 14px 16px;
    font: inherit;
    outline: none;
}

input:focus,
textarea:focus {
    border-color: rgba(120, 169, 255, 0.55);
    box-shadow: 0 0 0 4px rgba(120, 169, 255, 0.15);
}

textarea {
    min-height: 150px;
    resize: vertical;
}

.contact-links {
    display: grid;
    gap: 12px;
}

.contact-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 18px;
    border-radius: 20px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
}

.contact-link span {
    color: var(--muted);
}

.footer {
    margin: 30px 0 0;
    border-radius: 24px;
    padding: 18px 24px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    color: var(--muted);
}

.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 600ms ease, transform 600ms ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 960px) {
    .hero,
    .about-grid,
    .contact-grid,
    .project-grid {
        grid-template-columns: 1fr;
    }

    .topbar {
        border-radius: 28px;
        align-items: stretch;
        flex-direction: column;
    }

    .nav {
        justify-content: flex-start;
    }

    .stats,
    .quick-grid {
        grid-template-columns: 1fr;
    }

    .hero-copy,
    .hero-panel,
    .section-card,
    .contact-card {
        padding: 22px;
    }
}

@media (max-width: 640px) {
    .page {
        width: min(100% - 20px, 1180px);
    }

    .hero {
        padding-top: 34px;
    }

    .actions,
    .section-head,
    .footer {
        align-items: flex-start;
        flex-direction: column;
    }

    .nav a,
    .theme-toggle,
    .button {
        width: 100%;
    }
}