/* ========================================================
   光影集 · 个人图片展示站
   Light & Shade - Personal Visual Showcase
   ======================================================== */

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

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

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 15px;
    line-height: 1.7;
    color: var(--c-text);
    background: var(--c-bg);
    transition: background .3s, color .3s;
    min-height: 100vh;
    overflow-x: hidden;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s; }
button { font-family: inherit; cursor: pointer; border: 0; background: transparent; color: inherit; }
ul { list-style: none; padding: 0; margin: 0; }
h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 600; line-height: 1.3; }
p { margin: 0; }

:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 2px; }

/* ---------- Theme Variables ---------- */
:root {
    --c-bg:        #f7f8fc;
    --c-bg-soft:   #ffffff;
    --c-bg-deep:   #eef0f6;
    --c-text:      #1b1e2a;
    --c-text-soft: #55596b;
    --c-text-mute: #8389a0;
    --c-border:    rgba(20, 24, 40, 0.08);
    --c-shadow:    0 10px 30px rgba(20, 24, 50, 0.08);
    --c-shadow-lg: 0 20px 60px rgba(20, 24, 50, 0.14);

    --c-accent:    #6366f1;
    --c-accent-2:  #ec4899;
    --c-accent-3:  #06b6d4;
    --grad:        linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
    --grad-soft:   linear-gradient(135deg, rgba(99,102,241,.12), rgba(236,72,153,.12));

    --radius-sm:   8px;
    --radius:      14px;
    --radius-lg:   22px;

    --header-h:    72px;
}

:root[data-theme="dark"] {
    --c-bg:        #0e1022;
    --c-bg-soft:   #161932;
    --c-bg-deep:   #0a0c1c;
    --c-text:      #e8eaf5;
    --c-text-soft: #b0b4cc;
    --c-text-mute: #6e7393;
    --c-border:    rgba(255, 255, 255, 0.08);
    --c-shadow:    0 10px 30px rgba(0, 0, 0, 0.4);
    --c-shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.55);
    --grad-soft:   linear-gradient(135deg, rgba(99,102,241,.22), rgba(236,72,153,.22));
}

/* 跟随系统的深色（未手动设置主题时） */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --c-bg:        #0e1022;
        --c-bg-soft:   #161932;
        --c-bg-deep:   #0a0c1c;
        --c-text:      #e8eaf5;
        --c-text-soft: #b0b4cc;
        --c-text-mute: #6e7393;
        --c-border:    rgba(255, 255, 255, 0.08);
        --c-shadow:    0 10px 30px rgba(0, 0, 0, 0.4);
        --c-shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.55);
        --grad-soft:   linear-gradient(135deg, rgba(99,102,241,.22), rgba(236,72,153,.22));
    }
}

/* ---------- Layout ---------- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.site-main { padding-top: var(--header-h); }

.section {
    padding: 90px 0;
    position: relative;
}
.section--soft { background: var(--c-bg-soft); }
.section--deep { background: var(--c-bg-deep); }

.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 54px;
}
.section-title {
    font-size: 34px;
    letter-spacing: .5px;
    margin-bottom: 12px;
}
.section-title .accent {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.section-sub {
    color: var(--c-text-soft);
    font-size: 16px;
}

/* ---------- Progress Bar ---------- */
.page-progress {
    position: fixed;
    top: 0; left: 0;
    height: 3px;
    width: 0;
    background: var(--grad);
    z-index: 9999;
    transition: width .25s;
}

/* ---------- Header ---------- */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--header-h);
    z-index: 100;
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    background: color-mix(in srgb, var(--c-bg) 75%, transparent);
    border-bottom: 1px solid transparent;
    transition: transform .35s, background .25s, border-color .25s;
}
.site-header.is-scrolled {
    border-bottom-color: var(--c-border);
    background: color-mix(in srgb, var(--c-bg) 88%, transparent);
}
.site-header.is-hidden { transform: translateY(-100%); }

.header-inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.brand-logo { width: 40px; height: 40px; display: grid; place-items: center; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-size: 17px; font-weight: 700; letter-spacing: .5px; }
.brand-slogan { font-size: 11px; color: var(--c-text-mute); letter-spacing: 1px; }

.site-nav ul {
    display: flex;
    align-items: center;
    gap: 4px;
}
.site-nav a {
    position: relative;
    padding: 8px 14px;
    font-size: 14px;
    color: var(--c-text-soft);
    border-radius: var(--radius-sm);
    transition: color .2s, background .2s;
}
.site-nav a:hover { color: var(--c-text); background: var(--c-bg-deep); }
.site-nav a.is-active {
    color: var(--c-text);
    background: var(--grad-soft);
    font-weight: 600;
}
.site-nav a.is-active::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -4px;
    transform: translateX(-50%);
    width: 16px;
    height: 2px;
    background: var(--grad);
    border-radius: 2px;
}
.nav-close { display: none; }

.header-tools {
    display: flex;
    align-items: center;
    gap: 8px;
}
.tool-btn {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: var(--c-bg-deep);
    color: var(--c-text-soft);
    font-size: 13px;
    font-weight: 600;
    transition: transform .2s, background .2s, color .2s;
}
.tool-btn:hover { background: var(--grad-soft); color: var(--c-text); transform: translateY(-1px); }
.lang-btn { letter-spacing: 1px; }

.theme-btn .ico-sun { display: none; }
.theme-btn .ico-moon { display: block; }
:root[data-theme="dark"] .theme-btn .ico-sun { display: block; }
:root[data-theme="dark"] .theme-btn .ico-moon { display: none; }
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) .theme-btn .ico-sun { display: block; }
    :root:not([data-theme]) .theme-btn .ico-moon { display: none; }
}

.nav-toggle { display: none; }
.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: currentColor;
    border-radius: 2px;
    margin: 3px auto;
    transition: transform .25s;
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    min-height: calc(100vh - var(--header-h));
    display: flex;
    align-items: center;
    padding: 80px 0 60px;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(600px circle at 20% 30%, rgba(99,102,241,.25), transparent 60%),
        radial-gradient(500px circle at 80% 70%, rgba(236,72,153,.22), transparent 60%),
        radial-gradient(400px circle at 50% 50%, rgba(6,182,212,.18), transparent 60%);
    z-index: 0;
    animation: floatBg 14s ease-in-out infinite alternate;
}
@keyframes floatBg {
    from { transform: translate3d(0,0,0); }
    to   { transform: translate3d(30px,-20px,0); }
}

.hero-inner {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 60px;
    align-items: center;
}
.hero-text .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--grad-soft);
    color: var(--c-accent);
    font-size: 12px;
    letter-spacing: 1.5px;
    font-weight: 600;
    margin-bottom: 22px;
}
.hero-text .eyebrow::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--c-accent);
    box-shadow: 0 0 0 4px rgba(99,102,241,.2);
}
.hero-title {
    font-size: clamp(36px, 6vw, 64px);
    line-height: 1.15;
    letter-spacing: 1px;
    margin-bottom: 20px;
}
.hero-title .accent {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero-typing {
    font-size: 18px;
    color: var(--c-text-soft);
    min-height: 32px;
    margin-bottom: 10px;
}
.hero-typing::after {
    content: '|';
    color: var(--c-accent);
    animation: blink 1s steps(1) infinite;
    margin-left: 4px;
}
@keyframes blink { 50% { opacity: 0; } }
.hero-sub {
    color: var(--c-text-soft);
    margin-bottom: 32px;
    max-width: 520px;
}
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 26px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 14px;
    letter-spacing: .5px;
    transition: transform .2s, box-shadow .2s, background .2s;
    cursor: pointer;
}
.btn-primary {
    background: var(--grad);
    color: #fff;
    box-shadow: 0 10px 25px rgba(99,102,241,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(99,102,241,.45); }
.btn-ghost {
    background: var(--c-bg-soft);
    color: var(--c-text);
    border: 1px solid var(--c-border);
}
.btn-ghost:hover { transform: translateY(-2px); border-color: var(--c-accent); color: var(--c-accent); }

.hero-visual {
    position: relative;
    height: 420px;
}
.hero-visual .shape {
    position: absolute;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--c-shadow-lg);
    background: var(--c-bg-soft);
}
.hero-visual .shape-1 {
    width: 62%; height: 70%;
    left: 0; top: 8%;
    transform: rotate(-4deg);
    animation: floatY 6s ease-in-out infinite alternate;
}
.hero-visual .shape-2 {
    width: 50%; height: 55%;
    right: 0; bottom: 0;
    transform: rotate(5deg);
    animation: floatY 7s ease-in-out -2s infinite alternate;
}
.hero-visual .shape-3 {
    width: 34%; height: 34%;
    right: 8%; top: 0;
    transform: rotate(-8deg);
    animation: floatY 5s ease-in-out -1s infinite alternate;
}
@keyframes floatY {
    from { transform: translateY(0) rotate(var(--r, -4deg)); }
    to   { transform: translateY(-14px) rotate(var(--r, -4deg)); }
}
.hero-visual .shape svg { width: 100%; height: 100%; }

/* ---------- Feature Cards ---------- */
.feat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}
.feat-card {
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 32px 26px;
    transition: transform .3s, box-shadow .3s, border-color .3s;
    position: relative;
    overflow: hidden;
}
.feat-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--grad);
    opacity: 0;
    transition: opacity .3s;
    z-index: 0;
}
.feat-card > * { position: relative; z-index: 1; }
.feat-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--c-shadow-lg);
    border-color: transparent;
}
.feat-card:hover::before { opacity: 1; }
.feat-card:hover .feat-icon,
.feat-card:hover .feat-title,
.feat-card:hover .feat-desc { color: #fff; }
.feat-card:hover .feat-icon { background: rgba(255,255,255,.18); }

.feat-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: var(--grad-soft);
    color: var(--c-accent);
    display: grid;
    place-items: center;
    margin-bottom: 20px;
    transition: background .3s, color .3s;
}
.feat-title {
    font-size: 18px;
    margin-bottom: 8px;
    transition: color .3s;
}
.feat-desc {
    color: var(--c-text-soft);
    font-size: 14px;
    transition: color .3s;
}

/* ---------- Latest Works Preview ---------- */
.preview-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 18px;
}
.preview-grid .preview-item:nth-child(1) { grid-column: span 3; grid-row: span 2; }
.preview-grid .preview-item:nth-child(2) { grid-column: span 3; }
.preview-grid .preview-item:nth-child(3) { grid-column: span 2; }
.preview-grid .preview-item { grid-column: span 2; }

.preview-item {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--c-shadow);
    cursor: pointer;
    transition: transform .3s;
}
.preview-item:hover { transform: translateY(-4px) scale(1.01); }
.preview-item svg {
    width: 100%; height: 100%;
    transition: transform .4s;
}
.preview-item:hover svg { transform: scale(1.05); }
.preview-item .cap {
    position: absolute;
    left: 14px; bottom: 12px;
    color: #fff;
    font-size: 13px;
    letter-spacing: .5px;
    text-shadow: 0 2px 6px rgba(0,0,0,.35);
    z-index: 2;
}
.preview-item .cap small {
    display: block;
    font-size: 11px;
    opacity: .85;
    margin-top: 2px;
}

.view-more {
    text-align: center;
    margin-top: 40px;
}

/* ---------- Stats ---------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}
.stats-card {
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 34px 22px;
    text-align: center;
}
.stats-num {
    font-size: 44px;
    font-weight: 700;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1;
    margin-bottom: 8px;
}
.stats-num .plus { font-size: 22px; vertical-align: top; }
.stats-label {
    color: var(--c-text-soft);
    font-size: 14px;
    letter-spacing: 1px;
}

/* ---------- News List ---------- */
.news-list {
    max-width: 780px;
    margin: 0 auto;
    display: grid;
    gap: 14px;
}
.news-item {
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 18px 22px;
    display: grid;
    grid-template-columns: 28px 1fr;
    gap: 18px;
    align-items: center;
    transition: transform .2s, box-shadow .2s;
}
.news-item:hover { transform: translateX(4px); box-shadow: var(--c-shadow); }
.news-mark {
    display: grid;
    place-items: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--grad-soft);
}
.news-mark span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--grad);
    box-shadow: 0 0 0 3px rgba(99,102,241,.22);
}
.news-body h4 {
    font-size: 15px;
    margin-bottom: 4px;
}
.news-body p {
    color: var(--c-text-soft);
    font-size: 13px;
}

/* ---------- Gallery ---------- */
.g-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 38px;
}
.g-filter button {
    padding: 8px 18px;
    border-radius: 999px;
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    color: var(--c-text-soft);
    font-size: 13px;
    transition: all .2s;
}
.g-filter button:hover { color: var(--c-text); border-color: var(--c-accent); }
.g-filter button.is-active {
    background: var(--grad);
    border-color: transparent;
    color: #fff;
}

.g-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}
.g-item {
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    transition: transform .3s, box-shadow .3s;
}
.g-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--c-shadow-lg);
}
.g-item.is-hide { display: none; }
.g-cover {
    aspect-ratio: 4/3;
    overflow: hidden;
    position: relative;
}
.g-cover svg { width: 100%; height: 100%; transition: transform .5s; }
.g-item:hover .g-cover svg { transform: scale(1.06); }
.g-cover .badge {
    position: absolute;
    top: 12px; left: 12px;
    padding: 4px 10px;
    font-size: 11px;
    border-radius: 999px;
    background: rgba(255,255,255,.85);
    color: #333;
    backdrop-filter: blur(6px);
    letter-spacing: .5px;
}
.g-info {
    padding: 14px 16px 18px;
}
.g-info h4 { font-size: 15px; margin-bottom: 4px; }
.g-info p { color: var(--c-text-mute); font-size: 12px; }

/* Modal */
.g-modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.6);
    backdrop-filter: blur(6px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: 20px;
    opacity: 0;
    transition: opacity .25s;
}
.g-modal.is-open { display: flex; opacity: 1; }
.g-modal-inner {
    background: var(--c-bg-soft);
    border-radius: var(--radius-lg);
    max-width: 820px;
    width: 100%;
    max-height: 88vh;
    overflow: auto;
    position: relative;
    transform: translateY(20px);
    transition: transform .3s;
}
.g-modal.is-open .g-modal-inner { transform: translateY(0); }
.g-modal-close {
    position: absolute;
    top: 14px; right: 14px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(0,0,0,.5);
    color: #fff;
    display: grid;
    place-items: center;
    font-size: 22px;
    z-index: 2;
}
.g-modal-cover { aspect-ratio: 16/9; overflow: hidden; }
.g-modal-cover svg { width: 100%; height: 100%; }
.g-modal-body { padding: 26px 30px 30px; }
.g-modal-body h3 { font-size: 22px; margin-bottom: 10px; }
.g-modal-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    color: var(--c-text-mute);
    font-size: 13px;
    margin-bottom: 16px;
}
.g-modal-meta .dot { color: var(--c-accent); }

/* ---------- About ---------- */
.about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}
.about-intro-img {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--c-shadow-lg);
    aspect-ratio: 4/5;
}
.about-intro-img svg { width: 100%; height: 100%; }
.about-intro h3 { font-size: 26px; margin-bottom: 18px; }
.about-intro p {
    color: var(--c-text-soft);
    margin-bottom: 12px;
}

.timeline {
    position: relative;
    max-width: 780px;
    margin: 0 auto;
    padding: 10px 0;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 16px;
    top: 0; bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--c-accent), var(--c-accent-2));
    opacity: .4;
}
.timeline-item {
    position: relative;
    padding: 16px 0 16px 50px;
}
.timeline-item::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 22px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--grad);
    box-shadow: 0 0 0 4px var(--c-bg), 0 0 0 6px rgba(99,102,241,.25);
}
.timeline-item h4 {
    font-size: 16px;
    margin-bottom: 4px;
}
.timeline-item .tl-date {
    color: var(--c-accent);
    font-size: 12px;
    letter-spacing: 1px;
    font-weight: 600;
    margin-bottom: 6px;
    display: block;
}
.timeline-item p { color: var(--c-text-soft); font-size: 14px; }

.idea-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}
.idea-card {
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 26px 22px;
    text-align: center;
    transition: transform .2s, box-shadow .2s;
}
.idea-card:hover { transform: translateY(-4px); box-shadow: var(--c-shadow); }
.idea-card .idea-icon {
    width: 48px; height: 48px;
    border-radius: 12px;
    background: var(--grad-soft);
    color: var(--c-accent);
    display: grid;
    place-items: center;
    margin: 0 auto 14px;
}
.idea-card h5 { font-size: 15px; }

/* ---------- Services ---------- */
.srv-position {
    background: var(--grad-soft);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    max-width: 860px;
    margin: 0 auto 60px;
}
.srv-position h3 { font-size: 22px; margin-bottom: 12px; }
.srv-position p { color: var(--c-text-soft); }

.srv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}
.srv-card {
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: transform .2s, box-shadow .2s, border-color .2s;
}
.srv-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--c-shadow);
    border-color: var(--c-accent);
}
.srv-card .srv-num {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--c-accent);
    font-weight: 700;
    margin-bottom: 10px;
}
.srv-card h4 { font-size: 17px; margin-bottom: 8px; }
.srv-card p { color: var(--c-text-soft); font-size: 14px; }

.faq {
    max-width: 820px;
    margin: 0 auto;
}
.faq-item {
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
}
.faq-q {
    padding: 18px 22px;
    font-weight: 600;
    font-size: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    text-align: left;
}
.faq-q .arr {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--grad-soft);
    color: var(--c-accent);
    display: grid;
    place-items: center;
    font-size: 14px;
    transition: transform .25s;
}
.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s;
    color: var(--c-text-soft);
    font-size: 14px;
    padding: 0 22px;
}
.faq-item.is-open .faq-a { max-height: 200px; padding: 0 22px 18px; }
.faq-item.is-open .faq-q .arr { transform: rotate(45deg); }

/* ---------- Contact ---------- */
.ct-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 40px;
}
.ct-info {
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
}
.ct-info h3 { font-size: 20px; margin-bottom: 20px; }
.ct-info-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px dashed var(--c-border);
}
.ct-info-item:last-child { border-bottom: 0; }
.ct-info-item .ic {
    width: 40px; height: 40px;
    border-radius: 10px;
    background: var(--grad-soft);
    color: var(--c-accent);
    display: grid;
    place-items: center;
    flex-shrink: 0;
}
.ct-info-item .lbl {
    display: block;
    font-size: 12px;
    color: var(--c-text-mute);
    letter-spacing: 1px;
}
.ct-info-item .val { font-size: 15px; font-weight: 600; }

.ct-form {
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 32px 30px;
}
.ct-form h3 { font-size: 20px; margin-bottom: 6px; }
.ct-form .ct-form-sub {
    color: var(--c-text-soft);
    font-size: 13px;
    margin-bottom: 20px;
}
.field { margin-bottom: 16px; }
.field label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
}
.field input, .field textarea {
    width: 100%;
    padding: 12px 14px;
    font-size: 14px;
    border-radius: 10px;
    border: 1px solid var(--c-border);
    background: var(--c-bg);
    color: var(--c-text);
    font-family: inherit;
    transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus {
    outline: 0;
    border-color: var(--c-accent);
    box-shadow: 0 0 0 3px rgba(99,102,241,.18);
}
.field textarea { min-height: 120px; resize: vertical; }
.field .err {
    color: #ef4444;
    font-size: 12px;
    margin-top: 4px;
    display: none;
}
.field.is-error .err { display: block; }
.field.is-error input,
.field.is-error textarea { border-color: #ef4444; }

.ct-notice {
    margin-top: 24px;
    background: var(--grad-soft);
    border-radius: var(--radius);
    padding: 18px 20px;
    font-size: 13px;
    color: var(--c-text-soft);
}
.ct-notice h4 { font-size: 14px; margin-bottom: 8px; color: var(--c-text); }
.ct-notice li { padding: 3px 0 3px 18px; position: relative; }
.ct-notice li::before {
    content: '';
    position: absolute;
    left: 4px; top: 13px;
    width: 4px; height: 4px;
    border-radius: 50%;
    background: var(--c-accent);
}

.toast {
    position: fixed;
    top: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(-20px);
    padding: 12px 22px;
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    border-radius: 999px;
    box-shadow: var(--c-shadow-lg);
    font-size: 14px;
    z-index: 300;
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s, transform .25s;
}
.toast.is-show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.is-error { color: #ef4444; }
.toast.is-success { color: #10b981; }

/* ---------- Privacy Page ---------- */
.pv-wrap {
    max-width: 820px;
    margin: 0 auto;
}
.pv-block {
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 32px 34px;
    margin-bottom: 22px;
}
.pv-block h3 {
    font-size: 20px;
    margin-bottom: 14px;
    padding-left: 14px;
    border-left: 4px solid var(--c-accent);
}
.pv-block p {
    color: var(--c-text-soft);
    margin-bottom: 10px;
}
.pv-block li {
    padding: 6px 0 6px 20px;
    position: relative;
    color: var(--c-text-soft);
}
.pv-block li::before {
    content: '';
    position: absolute;
    left: 4px; top: 16px;
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--grad);
}
.pv-update {
    text-align: right;
    color: var(--c-text-mute);
    font-size: 13px;
    padding: 10px 8px 0;
}

/* ---------- Footer ---------- */
.site-footer {
    margin-top: 80px;
    background: var(--c-bg-soft);
    border-top: 1px solid var(--c-border);
}
.footer-inner {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 48px;
    padding: 60px 24px 40px;
}
.foot-col h4 {
    font-size: 14px;
    margin-bottom: 16px;
    letter-spacing: 1px;
}
.foot-col ul li { padding: 4px 0; }
.foot-col ul a { color: var(--c-text-soft); font-size: 14px; }
.foot-col ul a:hover { color: var(--c-accent); }
.foot-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.foot-name { font-size: 18px; font-weight: 700; }
.foot-brief { color: var(--c-text-soft); font-size: 14px; max-width: 320px; }
.foot-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--c-text-soft);
    font-size: 14px;
}

.foot-bottom {
    border-top: 1px solid var(--c-border);
    padding: 18px 0;
    font-size: 13px;
    color: var(--c-text-mute);
}
.foot-bottom-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}
.beian a { color: var(--c-text-mute); }
.beian a:hover { color: var(--c-accent); }
.beian .sep { margin: 0 8px; opacity: .5; }

/* ---------- Back to top ---------- */
.back-top {
    position: fixed;
    right: 26px;
    bottom: 26px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--c-bg-soft);
    border: 1px solid var(--c-border);
    color: var(--c-text);
    display: grid;
    place-items: center;
    box-shadow: var(--c-shadow);
    opacity: 0;
    transform: translateY(10px);
    pointer-events: none;
    transition: opacity .25s, transform .25s, background .25s;
    z-index: 50;
}
.back-top.is-show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-top:hover { background: var(--grad); color: #fff; border-color: transparent; }

/* ---------- Reveal Animation ---------- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .7s, transform .7s;
}
.reveal.is-in { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: .1s; }
.reveal-d2 { transition-delay: .2s; }
.reveal-d3 { transition-delay: .3s; }
.reveal-d4 { transition-delay: .4s; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: color-mix(in srgb, var(--c-accent) 50%, transparent); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-accent); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .feat-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .srv-grid { grid-template-columns: repeat(2, 1fr); }
    .idea-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-inner { grid-template-columns: 1fr; }
    .hero-visual { height: 360px; max-width: 520px; margin: 0 auto; }
    .about-intro { grid-template-columns: 1fr; }
    .ct-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .preview-grid { grid-template-columns: repeat(3, 1fr); }
    .preview-grid .preview-item:nth-child(1),
    .preview-grid .preview-item:nth-child(2),
    .preview-grid .preview-item { grid-column: span 1; grid-row: span 1; }
}

@media (max-width: 720px) {
    body { font-size: 14px; }
    .section { padding: 60px 0; }
    .section-title { font-size: 26px; }
    .hero { min-height: auto; padding: 50px 0 40px; }
    .hero-title { font-size: 36px; }
    .hero-typing { font-size: 15px; }
    .feat-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .srv-grid { grid-template-columns: 1fr; }
    .idea-grid { grid-template-columns: repeat(2, 1fr); }
    .preview-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: 1fr; gap: 30px; padding: 40px 24px 30px; }
    .brand-slogan { display: none; }

    .site-nav {
        position: fixed;
        top: 0; right: 0; bottom: 0;
        width: 78%;
        max-width: 320px;
        background: var(--c-bg-soft);
        box-shadow: -20px 0 50px rgba(0,0,0,.25);
        padding: 70px 24px 24px;
        transform: translateX(100%);
        transition: transform .3s;
        z-index: 101;
    }
    .site-nav.is-open { transform: translateX(0); }
    .site-nav ul { flex-direction: column; align-items: stretch; gap: 2px; }
    .site-nav a { display: block; padding: 12px 16px; font-size: 15px; }
    .nav-close {
        display: grid;
        place-items: center;
        position: absolute;
        top: 18px; right: 18px;
        width: 34px; height: 34px;
        border-radius: 50%;
        background: var(--c-bg-deep);
        font-size: 22px;
    }
    .nav-toggle { display: grid; place-items: center; }
    .site-nav a.is-active::after { display: none; }

    .news-item { grid-template-columns: 24px 1fr; gap: 12px; padding: 14px 16px; }
    .news-mark { width: 24px; height: 24px; }
    .foot-bottom-inner { flex-direction: column; text-align: center; }
}