/* =========================================================
   Portfolio — style.css  (Bright Vibrant Theme)
   颜色 / 间距 / 字体全部用 :root 变量，方便统一调整
   ========================================================= */

:root {
    /* Colors — bright vibrant palette */
    --color-bg:        #FFF8F1;          /* 暖米白主背景 */
    --color-bg-soft:   #FFFFFF;          /* 卡片白底 */
    --color-surface:   #FFFFFF;
    --color-border:    rgba(15, 23, 42, 0.08);
    --color-text:      #0F172A;          /* 深墨蓝主文字 */
    --color-text-dim:  #475569;          /* 次级文字 */

    --color-primary:   #06B6D4;          /* cyan 主色 */
    --color-primary-2: #0891B2;
    --color-accent:    #F59E0B;          /* amber 强调 */
    --color-pink:      #EC4899;          /* 粉 */
    --color-violet:    #8B5CF6;          /* 紫 */
    --color-lime:      #84CC16;          /* 青柠 */
    --color-coral:     #FB7185;          /* 珊瑚红 */

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter",
                 "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
                 "Noto Sans CJK SC", sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "JetBrains Mono",
                 Menlo, Consolas, monospace;

    /* Layout */
    --container: 1120px;
    --radius:    14px;
    --radius-lg: 22px;

    /* Motion */
    --ease:      cubic-bezier(.22, .61, .36, 1);
    --dur:       .45s;

    /* Shadows */
    --shadow-soft:   0 10px 30px rgba(15, 23, 42, .06);
    --shadow-card:   0 18px 40px rgba(15, 23, 42, .08);
    --shadow-strong: 0 24px 60px rgba(236, 72, 153, .18);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
    margin: 0;
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    /* 多色彩光晕背景 */
    background-image:
        radial-gradient(900px circle at 5% -5%,  rgba(236, 72, 153, .18), transparent 55%),
        radial-gradient(900px circle at 95% 5%,  rgba(139, 92, 246, .18), transparent 55%),
        radial-gradient(800px circle at 50% 100%, rgba(6, 182, 212, .14),  transparent 55%);
    background-attachment: fixed;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

/* ---------- Layout helpers ---------- */
.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 120px 0;
    position: relative;
}

.section-head {
    max-width: 720px;
    margin-bottom: 64px;
}

.section-eyebrow {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--color-pink);
    letter-spacing: .08em;
    margin: 0 0 12px;
    text-transform: lowercase;
    font-weight: 600;
}

.section-title {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin: 0 0 16px;
    background: linear-gradient(120deg, #0F172A 0%, #6D28D9 60%, #DB2777 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.section-lede {
    color: var(--color-text-dim);
    font-size: 17px;
    margin: 0;
    max-width: 560px;
}

/* =========================================================
   NAVBAR
   ========================================================= */
.navbar {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 50;
    transition: background var(--dur) var(--ease),
                border-color var(--dur) var(--ease),
                backdrop-filter var(--dur) var(--ease),
                box-shadow var(--dur) var(--ease);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    background: rgba(255, 248, 241, 0.78);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom-color: var(--color-border);
    box-shadow: 0 4px 20px rgba(15, 23, 42, .04);
}

.nav-inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
}
.nav-logo span { color: var(--color-pink); }

.nav-links {
    list-style: none;
    margin: 0; padding: 0;
    display: flex;
    gap: 36px;
}

.nav-link {
    position: relative;
    font-size: 15px;
    color: var(--color-text-dim);
    transition: color .25s var(--ease);
    padding: 6px 0;
    font-weight: 500;
}

.nav-link::after {
    content: "";
    position: absolute;
    left: 0; bottom: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--color-pink), var(--color-violet), var(--color-primary));
    border-radius: 2px;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform .35s var(--ease);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text);
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* Hamburger button — hidden on desktop */
.nav-toggle {
    display: none;
    background: transparent;
    border: 0;
    width: 40px; height: 40px;
    padding: 8px;
    flex-direction: column;
    justify-content: space-between;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: transform .3s var(--ease), opacity .3s var(--ease);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(10px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-10px) rotate(-45deg); }

/* =========================================================
   HERO
   ========================================================= */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero-bg-glow {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(700px circle at 20% 30%,  rgba(236, 72, 153, .35), transparent 60%),
        radial-gradient(600px circle at 80% 70%,  rgba(6,  182, 212, .30), transparent 60%),
        radial-gradient(500px circle at 60% 20%,  rgba(245, 158, 11, .25), transparent 60%);
    filter: blur(2px);
}

.hero-content { position: relative; z-index: 1; }

.hero-eyebrow {
    font-family: var(--font-mono);
    color: var(--color-violet);
    font-size: 14px;
    letter-spacing: .12em;
    margin: 0 0 24px;
    font-weight: 600;
}

.hero-title {
    font-size: clamp(40px, 8vw, 88px);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.035em;
    margin: 0 0 28px;
}

.hero-title .accent {
    background: linear-gradient(120deg, #EC4899 0%, #F59E0B 50%, #06B6D4 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* 逐字淡入：每个 .char 通过 JS 注入 */
.hero-title .char {
    display: inline-block;
    opacity: 0;
    transform: translateY(.5em);
    animation: charIn .7s var(--ease) forwards;
}

@keyframes charIn {
    to { opacity: 1; transform: translateY(0); }
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--color-text-dim);
    max-width: 600px;
    margin: 0 0 44px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: .01em;
    transition: transform .25s var(--ease),
                background .25s var(--ease),
                box-shadow .25s var(--ease),
                color .25s var(--ease),
                border-color .25s var(--ease);
    border: 1px solid transparent;
    will-change: transform;
}

.btn-primary {
    background: linear-gradient(120deg, var(--color-pink) 0%, var(--color-violet) 60%, var(--color-primary) 100%);
    background-size: 200% 100%;
    background-position: 0% 50%;
    color: #FFFFFF;
    box-shadow: 0 12px 30px rgba(236, 72, 153, .35);
}
.btn-primary:hover {
    transform: translateY(-2px);
    background-position: 100% 50%;
    box-shadow: 0 16px 40px rgba(139, 92, 246, .45);
}

.btn-ghost {
    background: rgba(255, 255, 255, .7);
    backdrop-filter: blur(6px);
    color: var(--color-text);
    border-color: var(--color-border);
}
.btn-ghost:hover {
    transform: translateY(-2px);
    border-color: var(--color-pink);
    color: var(--color-pink);
    background: #FFFFFF;
}

.hero-scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 22px; height: 36px;
    border: 1.5px solid var(--color-violet);
    border-radius: 14px;
    display: flex;
    justify-content: center;
    background: rgba(255, 255, 255, .5);
}
.hero-scroll-hint span {
    width: 2px; height: 8px;
    background: var(--color-pink);
    margin-top: 6px;
    border-radius: 2px;
    animation: scrollHint 1.6s var(--ease) infinite;
}
@keyframes scrollHint {
    0%   { transform: translateY(0); opacity: 0; }
    40%  { opacity: 1; }
    100% { transform: translateY(14px); opacity: 0; }
}

/* =========================================================
   ABOUT
   ========================================================= */
.about-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 80px;
    align-items: center;
}

.about-avatar { display: flex; justify-content: center; }

.avatar-shape {
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: conic-gradient(
        from 180deg,
        #EC4899, #F59E0B, #84CC16, #06B6D4, #8B5CF6, #EC4899
    );
    position: relative;
    display: grid;
    place-items: center;
    box-shadow: 0 30px 80px rgba(236, 72, 153, .35);
    transition: transform .5s var(--ease);
    animation: avatarSpin 18s linear infinite;
}
@keyframes avatarSpin {
    to { filter: hue-rotate(360deg); }
}
.avatar-shape::before {
    content: "";
    position: absolute;
    inset: 8px;
    border-radius: 50%;
    background: #FFFFFF;
}
.avatar-shape::after {
    content: "";
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    border: 1.5px dashed rgba(236, 72, 153, .35);
    animation: spin 22s linear infinite;
}
.avatar-shape:hover { transform: scale(1.04) rotate(-2deg); }
.avatar-shape span {
    font-family: var(--font-mono);
    font-size: 72px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-pink), var(--color-violet), var(--color-primary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    position: relative;
    z-index: 1;
}

@keyframes spin { to { transform: rotate(360deg); } }

.about-paragraph {
    font-size: 17px;
    color: var(--color-text);
    margin: 0 0 32px;
    max-width: 56ch;
}

.about-meta {
    list-style: none;
    margin: 0; padding: 0;
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}
.about-meta li {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.about-meta strong {
    font-size: 32px;
    font-family: var(--font-mono);
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--color-pink), var(--color-violet));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 800;
}
.about-meta li:nth-child(2) strong {
    background: linear-gradient(135deg, var(--color-accent), var(--color-coral));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.about-meta li:nth-child(3) strong {
    background: linear-gradient(135deg, var(--color-primary), var(--color-lime));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.about-meta span {
    font-size: 13px;
    color: var(--color-text-dim);
}

/* =========================================================
   SKILLS
   ========================================================= */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.skill-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: transform .35s var(--ease),
                border-color .35s var(--ease),
                box-shadow .35s var(--ease);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
}

.skill-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(236, 72, 153, .08), rgba(6, 182, 212, .08) 60%, transparent);
    opacity: 0;
    transition: opacity .4s var(--ease);
    pointer-events: none;
}

/* 顶部彩色细条 */
.skill-card::after {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-pink), var(--color-violet), var(--color-primary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .4s var(--ease);
}

.skill-card:hover {
    transform: translateY(-8px);
    border-color: rgba(139, 92, 246, .35);
    box-shadow: var(--shadow-card);
}
.skill-card:hover::before { opacity: 1; }
.skill-card:hover::after  { transform: scaleX(1); }

/* 让 6 个图标各有自己的颜色，更鲜艳 */
.skill-icon {
    font-size: 32px;
    width: 60px; height: 60px;
    display: grid; place-items: center;
    border-radius: 16px;
    margin-bottom: 22px;
    transition: transform .35s var(--ease);
}
.skill-card:hover .skill-icon { transform: rotate(-6deg) scale(1.06); }

.skill-card:nth-child(1) .skill-icon { background: rgba(245, 158, 11, .14); border: 1px solid rgba(245, 158, 11, .28); }
.skill-card:nth-child(2) .skill-icon { background: rgba(6, 182, 212, .14);  border: 1px solid rgba(6, 182, 212, .28); }
.skill-card:nth-child(3) .skill-icon { background: rgba(236, 72, 153, .14); border: 1px solid rgba(236, 72, 153, .28); }
.skill-card:nth-child(4) .skill-icon { background: rgba(139, 92, 246, .14); border: 1px solid rgba(139, 92, 246, .28); }
.skill-card:nth-child(5) .skill-icon { background: rgba(132, 204, 22, .14); border: 1px solid rgba(132, 204, 22, .28); }
.skill-card:nth-child(6) .skill-icon { background: rgba(251, 113, 133, .14); border: 1px solid rgba(251, 113, 133, .28); }

.skill-name {
    font-size: 19px;
    margin: 0 0 8px;
    letter-spacing: -0.01em;
    font-weight: 700;
    color: var(--color-text);
}

.skill-desc {
    font-size: 14.5px;
    color: var(--color-text-dim);
    margin: 0;
    line-height: 1.65;
}

/* =========================================================
   CONTACT
   ========================================================= */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.contact-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: transform .3s var(--ease),
                border-color .3s var(--ease),
                box-shadow .3s var(--ease);
    box-shadow: var(--shadow-soft);
}
.contact-card:hover {
    transform: translateY(-4px);
    border-color: rgba(245, 158, 11, .45);
    box-shadow: var(--shadow-card);
}

.contact-icon {
    font-size: 28px;
    width: 56px; height: 56px;
    display: grid; place-items: center;
    background: linear-gradient(135deg, rgba(245, 158, 11, .15), rgba(236, 72, 153, .15));
    border: 1px solid rgba(245, 158, 11, .25);
    border-radius: 16px;
    flex-shrink: 0;
}

.contact-card:nth-child(2) .contact-icon {
    background: linear-gradient(135deg, rgba(6, 182, 212, .15), rgba(139, 92, 246, .15));
    border-color: rgba(139, 92, 246, .28);
}

.contact-meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.contact-label {
    font-size: 12px;
    color: var(--color-pink);
    text-transform: uppercase;
    letter-spacing: .12em;
    font-weight: 700;
}

.contact-value {
    font-size: 15px;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 500;
}

.contact-qr { flex-direction: column; align-items: flex-start; gap: 16px; }

.qr-placeholder {
    width: 100%;
    aspect-ratio: 1 / 1;
    max-width: 160px;
    background:
        repeating-conic-gradient(#0F172A 0% 25%, #FFFFFF 0% 50%) 50% / 12px 12px,
        linear-gradient(135deg, var(--color-pink), var(--color-violet));
    border-radius: 12px;
    display: grid;
    place-items: center;
    color: var(--color-bg);
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 700;
    box-shadow: inset 0 0 0 6px var(--color-surface),
                0 8px 24px rgba(139, 92, 246, .25);
    position: relative;
}
.qr-placeholder span {
    background: linear-gradient(135deg, var(--color-pink), var(--color-violet));
    color: #FFFFFF;
    padding: 5px 12px;
    border-radius: 8px;
    letter-spacing: .08em;
    box-shadow: 0 4px 12px rgba(139, 92, 246, .35);
}

/* =========================================================
   FOOTER
   ========================================================= */
.footer {
    border-top: 1px solid var(--color-border);
    padding: 32px 0;
    color: var(--color-text-dim);
    font-size: 14px;
    background: rgba(255, 255, 255, .4);
}
.footer-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}
.footer p { margin: 0; }

/* =========================================================
   Reveal-on-scroll
   ========================================================= */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 860px) {
    .section { padding: 80px 0; }

    .nav-toggle { display: flex; }

    .nav-links {
        position: fixed;
        top: 64px; right: 16px; left: 16px;
        flex-direction: column;
        gap: 4px;
        padding: 16px;
        background: rgba(255, 248, 241, 0.96);
        backdrop-filter: blur(14px);
        border: 1px solid var(--color-border);
        border-radius: var(--radius);
        box-shadow: var(--shadow-card);
        transform: translateY(-12px);
        opacity: 0;
        pointer-events: none;
        transition: opacity .25s var(--ease), transform .25s var(--ease);
    }
    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    .nav-links li { width: 100%; }
    .nav-link {
        display: block;
        padding: 12px 14px;
        border-radius: 10px;
    }
    .nav-link::after { display: none; }
    .nav-link:hover, .nav-link.active {
        background: linear-gradient(90deg, rgba(236, 72, 153, .08), rgba(6, 182, 212, .08));
        color: var(--color-text);
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    .about-meta { justify-content: center; }

    .skills-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .hero { padding-top: 140px; }
    .hero-actions { justify-content: flex-start; }
}

@media (max-width: 480px) {
    .container { padding: 0 18px; }
    .btn { padding: 12px 22px; font-size: 14px; }
    .avatar-shape { width: 200px; height: 200px; }
    .avatar-shape span { font-size: 60px; }
}

/* Respect reduced-motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .001ms !important;
        transition-duration: .001ms !important;
    }
    html { scroll-behavior: auto; }
}