/* 官网与协议页共用 */
:root {
    --bg: #0a0e17;
    --bg-alt: #111827;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --accent: #38bdf8;
    --accent-dim: #0ea5e9;
    --card: rgba(255, 255, 255, 0.04);
    --border: rgba(255, 255, 255, 0.08);
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

.container.narrow {
    max-width: 720px;
}

/* Nav */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0.85rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--text);
    text-decoration: none;
}

.logo:hover {
    color: var(--accent);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--muted);
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: var(--accent);
}

/* Hero */
.hero {
    position: relative;
    min-height: 88vh;
    display: flex;
    align-items: center;
    padding: 6rem 1.25rem 4rem;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(56, 189, 248, 0.25), transparent),
        radial-gradient(ellipse 60% 40% at 100% 50%, rgba(14, 165, 233, 0.12), transparent),
        linear-gradient(180deg, #0a0e17 0%, #111827 100%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 640px;
}

.hero-tag {
    font-size: 0.75rem;
    letter-spacing: 0.35em;
    color: var(--accent);
    margin: 0 0 1rem;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    line-height: 1.15;
    margin: 0 0 1rem;
}

.hero .accent {
    color: var(--accent);
}

.hero-desc {
    color: var(--muted);
    font-size: 1.05rem;
    max-width: 520px;
}

.hero-actions {
    margin-top: 2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.btn {
    display: inline-block;
    padding: 0.65rem 1.35rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
}

.btn.primary {
    background: linear-gradient(135deg, var(--accent-dim), var(--accent));
    color: #0a0e17;
}

.btn.primary:hover {
    filter: brightness(1.08);
    text-decoration: none;
}

.btn.ghost {
    border-color: var(--border);
    color: var(--text);
    background: transparent;
}

.btn.ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
    text-decoration: none;
}

/* Sections */
.section {
    padding: 4rem 0;
}

.section.alt {
    background: var(--bg-alt);
}

.section-title {
    font-size: 1.75rem;
    margin: 0 0 0.75rem;
}

.section-lead {
    color: var(--muted);
    max-width: 640px;
    margin: 0 0 2rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
}

.card h3 {
    margin: 0 0 0.5rem;
    font-size: 1.1rem;
}

.card p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.code-block {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    font-size: 0.9rem;
}

.code-block code {
    word-break: break-all;
    color: #a5f3fc;
}

.contact-mail {
    font-size: 1.25rem;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    padding: 1.5rem 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.footer.minimal {
    margin-top: 2rem;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

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

/* Policy page */
.policy-page {
    padding-top: 4rem;
}

.policy-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
}

.policy-header .back {
    color: var(--muted);
    font-size: 0.95rem;
}

.policy-main {
    padding: 2rem 1.25rem 4rem;
}

.policy-title {
    font-size: 1.75rem;
    margin: 0 0 0.5rem;
}

.policy-meta {
    color: var(--muted);
    font-size: 0.9rem;
    margin: 0 0 2rem;
}

.policy-body {
    font-size: 1rem;
    color: #d1d5db;
}

.policy-body h2 {
    font-size: 1.25rem;
    margin: 2rem 0 0.75rem;
}

.policy-body p {
    margin: 0 0 1rem;
}

.policy-body ul,
.policy-body ol {
    margin: 0 0 1rem;
    padding-left: 1.35rem;
}

.policy-body .empty {
    color: var(--muted);
}

/* 协议页：仅富文本正文（无顶栏/页脚） */
body.policy-bare {
    margin: 0;
    padding: 1rem 1.25rem 2rem;
    background: #fff;
    color: #111827;
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

.policy-bare-main {
    max-width: 800px;
    margin: 0 auto;
    word-wrap: break-word;
}

.policy-bare-main img {
    max-width: 100%;
    height: auto;
}

.policy-bare-main h1,
.policy-bare-main h2,
.policy-bare-main h3 {
    margin: 1.25em 0 0.5em;
    line-height: 1.3;
}

.policy-bare-main h1:first-child,
.policy-bare-main h2:first-child {
    margin-top: 0;
}

.policy-bare-main p {
    margin: 0 0 1em;
}

.policy-bare-main ul,
.policy-bare-main ol {
    margin: 0 0 1em;
    padding-left: 1.35rem;
}

.policy-bare-main .empty {
    color: #6b7280;
}

.policy-bare-main code {
    font-size: 0.9em;
}

.policy-bare-main a {
    color: #0369a1;
    text-decoration: underline;
}

.policy-bare-main table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 1em;
    font-size: 0.95em;
}

.policy-bare-main th,
.policy-bare-main td {
    border: 1px solid #d1d5db;
    padding: 0.5em 0.65em;
    text-align: left;
    vertical-align: top;
}

.policy-bare-main th {
    background: #f3f4f6;
    font-weight: 600;
}

.policy-bare-main blockquote {
    margin: 0 0 1em;
    padding: 0.5em 1em;
    border-left: 4px solid #d1d5db;
    color: #4b5563;
}

.policy-bare-main hr {
    border: none;
    border-top: 1px solid #e5e7eb;
    margin: 1.5em 0;
}

/* Admin */
body.admin {
    background: #f3f4f6;
    color: #111827;
}

.admin-wrap {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1.25rem 4rem;
}

.admin-wrap a {
    color: #0369a1;
}

.admin-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.admin-card {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    padding: 1.5rem;
    margin-bottom: 1.25rem;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.admin-table th,
.admin-table td {
    text-align: left;
    padding: 0.65rem 0.5rem;
    border-bottom: 1px solid #e5e7eb;
}

.admin-table th {
    color: #6b7280;
    font-weight: 600;
}

.admin-form label {
    display: block;
    font-weight: 600;
    margin: 1rem 0 0.35rem;
    font-size: 0.9rem;
}

.admin-form input[type="text"],
.admin-form input[type="password"],
.admin-form textarea {
    width: 100%;
    padding: 0.5rem 0.65rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 0.95rem;
    font-family: inherit;
}

.admin-form textarea {
    min-height: 200px;
    font-family: ui-monospace, Consolas, monospace;
    font-size: 0.85rem;
}

.admin-form textarea.rte-source {
    min-height: 120px;
}

.admin-form .tox-tinymce {
    margin-bottom: 0.25rem;
}

.admin-form .hint {
    font-size: 0.8rem;
    color: #6b7280;
    margin: 0.25rem 0 0;
}

.msg {
    padding: 0.65rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.msg.ok {
    background: #d1fae5;
    color: #065f46;
}

.msg.err {
    background: #fee2e2;
    color: #991b1b;
}

.btn-dark {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: #111827;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    text-decoration: none;
}

.btn-dark:hover {
    background: #374151;
}

.btn-danger {
    background: #b91c1c;
    color: #fff;
    border: none;
    padding: 0.35rem 0.65rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
}

.btn-danger:hover {
    background: #991b1b;
}

.inline-form {
    display: inline;
}