:root {
    --bg: #0b0f14;
    --bg-deep: #0a0c10;
    --surface: rgba(20, 24, 32, 0.75);
    --surface-strong: rgba(24, 30, 40, 0.92);
    --stroke: rgba(255, 255, 255, 0.08);
    --text: #e7ecf5;
    --muted: #9aa6bf;
    --accent: #d7a05a;
    --accent-soft: rgba(215, 160, 90, 0.18);
    --teal: #5bd1d7;
    --radius: 22px;
    --radius-lg: 28px;
    --shadow: 0 28px 70px rgba(7, 10, 16, 0.5);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    line-height: 1.6;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background:
        radial-gradient(circle at 10% 20%, rgba(91, 209, 215, 0.18), transparent 45%),
        radial-gradient(circle at 90% 10%, rgba(215, 160, 90, 0.2), transparent 40%),
        radial-gradient(circle at 70% 80%, rgba(106, 140, 210, 0.15), transparent 45%),
        linear-gradient(180deg, #0b0f14 0%, #0f172a 55%, #0b0f14 100%);
    z-index: -2;
}

body::after {
    content: "";
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/></filter><rect width='160' height='160' filter='url(%23n)' opacity='0.4'/></svg>");
    opacity: 0.08;
    pointer-events: none;
    z-index: -1;
}

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

img {
    max-width: 100%;
    display: block;
}

.container {
    width: min(1200px, 92vw);
    margin: 0 auto;
}

.site-nav {
    position: fixed;
    top: 20px;
    left: 0;
    right: 0;
    z-index: 100;
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 22px;
    border-radius: 999px;
    background: rgba(12, 16, 22, 0.8);
    border: 1px solid var(--stroke);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(14px);
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: radial-gradient(circle at top, #fff0d8, #d7a05a 55%, #5b3f1f 100%);
    display: grid;
    place-items: center;
    font-weight: 700;
    color: #1a1410;
    font-family: "ZCOOL XiaoWei", serif;
    letter-spacing: 1px;
}

.brand-info h1 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
}

.brand-info span {
    color: var(--muted);
    font-size: 12px;
}

.nav-links {
    display: flex;
    gap: 22px;
    align-items: center;
}

.nav-links a {
    color: var(--muted);
    font-size: 14px;
    padding: 6px 10px;
    border-radius: 999px;
    transition: all 0.3s ease;
}

.nav-links a:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.06);
}

.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--text);
    padding: 6px;
    cursor: pointer;
}

.hero {
    padding: 140px 0 90px;
}

.hero-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 40px;
    align-items: center;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 3px;
    font-size: 12px;
    color: var(--teal);
    margin-bottom: 18px;
}

.hero h2 {
    font-family: "ZCOOL XiaoWei", serif;
    font-size: clamp(2.6rem, 4.8vw, 4.6rem);
    margin: 0 0 20px;
    line-height: 1.1;
}

.hero p.lead {
    color: var(--muted);
    font-size: 18px;
    margin: 0 0 28px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 32px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 22px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.3s ease;
}

.btn.primary {
    background: linear-gradient(120deg, #d7a05a, #f2c981);
    color: #1a1410;
    box-shadow: 0 12px 30px rgba(215, 160, 90, 0.35);
}

.btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 40px rgba(215, 160, 90, 0.45);
}

.btn.ghost {
    border-color: var(--stroke);
    color: var(--text);
    background: rgba(255, 255, 255, 0.04);
}

.btn.ghost:hover {
    border-color: rgba(255, 255, 255, 0.2);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
}

.stat {
    padding: 16px 18px;
    border-radius: 16px;
    background: var(--surface);
    border: 1px solid var(--stroke);
}

.stat-value {
    display: block;
    font-size: 22px;
    font-weight: 700;
}

.stat-label {
    font-size: 12px;
    color: var(--muted);
}

.hero-visual {
    position: relative;
    padding: 24px;
}

.orbit-card {
    background: var(--surface-strong);
    border-radius: var(--radius-lg);
    padding: 28px;
    border: 1px solid var(--stroke);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.orbit-card::before {
    content: "";
    position: absolute;
    inset: -60% 40% auto -20%;
    height: 120%;
    background: radial-gradient(circle, rgba(215, 160, 90, 0.2), transparent 70%);
}

.orbit-card h3 {
    margin: 0 0 8px;
    font-size: 20px;
}

.orbit-card p {
    margin: 0 0 20px;
    color: var(--muted);
    font-size: 14px;
}

.orbit-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.orbit-item {
    padding: 12px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 12px;
    color: var(--muted);
}

.constellation {
    width: 100%;
    margin-top: 22px;
    opacity: 0.9;
}

.section {
    padding: 90px 0;
}

.section-head {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    align-items: flex-end;
    margin-bottom: 40px;
}

.section-title {
    font-family: "ZCOOL XiaoWei", serif;
    font-size: clamp(2rem, 4vw, 3rem);
    margin: 0 0 10px;
}

.section-subtitle {
    color: var(--muted);
    max-width: 520px;
    margin: 0;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 26px;
}

.project-card {
    background: var(--surface-strong);
    border-radius: var(--radius);
    border: 1px solid var(--stroke);
    overflow: hidden;
    position: relative;
    transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.project-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(215, 160, 90, 0.15), transparent 60%);
    opacity: 0;
    transition: opacity 0.35s ease;
    pointer-events: none;
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 24px 50px rgba(4, 8, 14, 0.45);
}

.project-card:hover::before {
    opacity: 1;
}

.project-card.featured {
    grid-column: span 2;
}

.project-media {
    position: relative;
    height: 200px;
    overflow: hidden;
    z-index: 1;
}

.project-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-label {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(8, 10, 14, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.12);
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 12px;
    color: var(--text);
}

.project-body {
    position: relative;
    z-index: 1;
    padding: 22px;
}

.project-body h3 {
    margin: 0 0 10px;
    font-size: 20px;
}

.project-body p {
    margin: 0 0 16px;
    color: var(--muted);
    font-size: 14px;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.tag {
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(91, 209, 215, 0.12);
    border: 1px solid rgba(91, 209, 215, 0.25);
    font-size: 12px;
    color: #b8eef2;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 18px;
}

.btn.full {
    width: 100%;
}

.contact-card {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    background: var(--surface-strong);
    border-radius: var(--radius-lg);
    border: 1px solid var(--stroke);
    padding: 30px;
}

.contact-panel {
    padding: 18px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.contact-panel h4 {
    margin: 0 0 12px;
    font-size: 18px;
}

.contact-panel p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
}

.wechat-id {
    margin-top: 14px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 12px;
    background: rgba(215, 160, 90, 0.15);
    border: 1px dashed rgba(215, 160, 90, 0.4);
    font-weight: 600;
    letter-spacing: 1px;
}

.wechat-section {
    padding-bottom: 80px;
}

.contact-merged-section {
    padding-top: 70px;
    padding-bottom: 80px;
}

.contact-merged-stack {
    display: grid;
    gap: 24px;
}

.wechat-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 28px;
    align-items: center;
    background: var(--surface-strong);
    border-radius: var(--radius-lg);
    border: 1px solid var(--stroke);
    padding: 30px;
}

.wechat-highlight {
    font-size: 20px;
    font-weight: 600;
}

.wechat-note {
    color: var(--muted);
    font-size: 14px;
    margin-top: 8px;
}

.wechat-qr {
    width: 180px;
    padding: 12px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px dashed rgba(215, 160, 90, 0.35);
}

.wechat-qr img {
    width: 100%;
    border-radius: 12px;
}

.group-chat-section {
    padding-top: 10px;
    padding-bottom: 90px;
}

.group-chat-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 30px;
    align-items: center;
    background: var(--surface-strong);
    border-radius: var(--radius-lg);
    border: 1px solid var(--stroke);
    padding: 30px;
    position: relative;
    overflow: hidden;
}

.group-chat-card::before {
    content: "";
    position: absolute;
    inset: -40% 55% auto -15%;
    height: 130%;
    background: radial-gradient(circle, rgba(91, 209, 215, 0.2), transparent 70%);
    pointer-events: none;
}

.group-chat-copy {
    position: relative;
    z-index: 1;
}

.group-chat-highlight {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.group-chat-note {
    color: var(--muted);
    margin-top: 10px;
    font-size: 14px;
}

.group-chat-expire {
    margin-top: 14px;
    display: inline-flex;
    padding: 8px 12px;
    border-radius: 10px;
    border: 1px dashed rgba(91, 209, 215, 0.45);
    background: rgba(91, 209, 215, 0.12);
    color: #c4f2f4;
    font-size: 13px;
}

.group-chat-qr {
    width: min(360px, 82vw);
    padding: 12px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px dashed rgba(215, 160, 90, 0.35);
}

.group-chat-qr img {
    width: 100%;
    border-radius: 14px;
}

.detail-hero {
    padding: 140px 0 60px;
}

.detail-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 28px;
    align-items: start;
}

.detail-card {
    background: var(--surface-strong);
    border-radius: var(--radius-lg);
    border: 1px solid var(--stroke);
    padding: 28px;
}

.detail-meta {
    display: grid;
    gap: 10px;
    font-size: 14px;
    color: var(--muted);
}

.detail-meta strong {
    color: var(--text);
    font-weight: 600;
}

.detail-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
}

.doc-block {
    white-space: pre-wrap;
    font-size: 14px;
    color: var(--text);
    background: rgba(8, 12, 18, 0.7);
    border: 1px solid var(--stroke);
    border-radius: 18px;
    padding: 22px;
    line-height: 1.7;
}


.message-section {
    padding-top: 60px;
}

.message-card {
    background: var(--surface-strong);
    border-radius: var(--radius-lg);
    border: 1px solid var(--stroke);
    padding: 30px;
}

.message-card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
}

.message-card-title {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
}

.message-count {
    font-size: 12px;
    color: var(--muted);
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.message-form {
    display: grid;
    gap: 18px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.form-field label {
    display: block;
    margin-bottom: 6px;
    font-size: 12px;
    color: var(--muted);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid var(--stroke);
    background: rgba(8, 12, 18, 0.6);
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
}

.form-textarea {
    min-height: 160px;
    resize: vertical;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: rgba(91, 209, 215, 0.6);
    box-shadow: 0 0 0 3px rgba(91, 209, 215, 0.15);
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

.form-hint {
    font-size: 12px;
    color: var(--muted);
}


.message-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 24px;
    align-items: start;
}

.message-history {
    display: grid;
    gap: 14px;
    max-height: 360px;
    overflow: auto;
    padding-right: 6px;
}

.message-item {
    padding: 16px;
    border-radius: 16px;
    background: rgba(8, 12, 18, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.message-content {
    margin: 0 0 10px;
    font-size: 14px;
    color: var(--text);
}

.message-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 12px;
    color: var(--muted);
}

.message-empty {
    padding: 18px;
    border-radius: 14px;
    border: 1px dashed rgba(255, 255, 255, 0.16);
    color: var(--muted);
    font-size: 13px;
    text-align: center;
}

footer {
    padding: 40px 0 60px;
    text-align: center;
    color: var(--muted);
    font-size: 13px;
}

.reveal {
    opacity: 0;
    transform: translateY(16px);
    animation: rise 0.8s ease forwards;
    animation-delay: var(--delay, 0s);
}

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

.toast {
    position: fixed;
    top: 110px;
    right: 24px;
    background: rgba(8, 10, 14, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--text);
    padding: 14px 18px;
    border-radius: 14px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 200;
    transform: translateX(120%);
    transition: transform 0.3s ease;
}

.toast.show {
    transform: translateX(0);
}

@media (max-width: 900px) {
    .site-nav {
        top: 12px;
    }

    .nav-inner {
        border-radius: 18px;
    }

    .nav-links {
        position: absolute;
        top: 70px;
        right: 16px;
        flex-direction: column;
        padding: 14px;
        background: rgba(10, 14, 20, 0.95);
        border: 1px solid var(--stroke);
        border-radius: 16px;
        opacity: 0;
        pointer-events: none;
        transform: translateY(-10px);
        transition: all 0.3s ease;
    }

    .nav-links.open {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }

    .menu-toggle {
        display: inline-flex;
    }

    .project-card.featured {
        grid-column: span 1;
    }
}

@media (max-width: 880px) {
    .detail-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 860px) {
    .message-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 700px) {
    .wechat-card {
        grid-template-columns: 1fr;
    }

    .wechat-qr {
        width: 100%;
        max-width: 220px;
    }

    .group-chat-card {
        grid-template-columns: 1fr;
    }

    .group-chat-qr {
        width: 100%;
        max-width: 360px;
    }
}

@media (max-width: 600px) {
    .hero {
        padding-top: 120px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .nav-inner {
        padding: 12px 16px;
    }
}