/* Theme: Joyful Connectivity (星彩乐想网) — Warm orange/blue, rounded, friendly */
:root {
	--bg: #0b0f12;
	--panel: #10161b;
	--card: #121a22;
	--text: #eef4f8;
	--muted: #b9c8d6;
	--primary: #ff8a4b;
	--primary-600: #ff6e2a;
	--accent: #44c3ff;
	--border: #21303c;
	--shadow: 0 8px 28px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
	margin: 0;
	font-family: "Noto Sans SC", system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
	background:
		radial-gradient(60% 40% at 10% 10%, rgba(255,138,75,.20), transparent 60%),
		radial-gradient(40% 30% at 90% 10%, rgba(68,195,255,.18), transparent 60%),
		linear-gradient(180deg, #0b0f12 0%, #0c1117 100%);
	color: var(--text);
	line-height: 1.65;
}
.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; backdrop-filter: blur(12px); background: rgba(12,16,20,.55); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-weight: 700; color: var(--text); text-decoration: none; font-size: 18px; letter-spacing: .4px; }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); color: var(--text); padding: 6px 10px; border-radius: 12px; }
.site-nav ul { display: flex; gap: 18px; list-style: none; margin: 0; padding: 0; }
.site-nav a { color: var(--muted); text-decoration: none; padding: 10px 12px; border-radius: 12px; transition: background .2s ease, color .2s ease; }
.site-nav a:hover { color: var(--text); background: rgba(255,255,255,.05); }

/* Hero — sunny friendly */
.hero { position: relative; padding: 96px 0 72px; overflow: hidden; border-bottom: 1px solid var(--border); }
.bright-hero { padding-top: 104px; }
.hero-inner { text-align: center; position: relative; z-index: 1; }
.hero h1 { margin: 0 0 14px; font-size: clamp(28px, 4vw, 42px); line-height: 1.22; }
.hero p { margin: 0 auto 24px; max-width: 740px; color: var(--muted); }
.hero-actions { display: inline-flex; gap: 12px; }
.btn { display: inline-block; padding: 12px 18px; border-radius: 14px; text-decoration: none; cursor: pointer; transition: transform .08s ease, background .2s ease, color .2s ease; border: 1px solid var(--border); color: var(--text); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-600) 100%); border-color: transparent; color: #fff; box-shadow: 0 10px 24px rgba(255,138,75,.35); }
.btn.ghost { background: rgba(255,255,255,.02); }
.hero-bg.sun {
	position: absolute; inset: -10% -20% -20% -20%; pointer-events: none;
	background:
		radial-gradient(35% 35% at 80% 5%, rgba(255,138,75,.30), transparent 60%),
		radial-gradient(30% 30% at 15% 25%, rgba(68,195,255,.22), transparent 60%),
		radial-gradient(40% 30% at 50% 80%, rgba(255,138,75,.18), transparent 60%);
}

/* Sections */
.section { padding: 72px 0; }
.section.alt { background: var(--panel); }
.section-header { text-align: center; margin-bottom: 28px; }
.section-header h2 { margin: 0 0 6px; font-size: 28px; }
.section-subtitle { color: var(--muted); margin: 0; }

.grid.two { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.grid.three { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 26px 0 0; padding: 0; list-style: none; }
.stats li { display: grid; place-items: center; background: var(--card); border: 1px solid var(--border); padding: 16px; border-radius: 16px; box-shadow: var(--shadow); }
.stats strong { font-size: 20px; }
.stats span { color: var(--muted); font-size: 13px; }

.cards .card { background: var(--card); border: 1px solid var(--border); border-radius: 18px; padding: 18px; box-shadow: var(--shadow); }
.cards .card h3 { margin: 0 0 8px; font-size: 18px; }
.cards .card p { margin: 0; color: var(--muted); }

/* News / Tips */
.news-list { display: grid; gap: 16px; list-style: none; margin: 0; padding: 0; }
.news-list li { display: grid; grid-template-columns: 100px 1fr; gap: 16px; align-items: start; background: var(--card); border: 1px solid var(--border); border-radius: 18px; padding: 16px; }
.news-list time { display: inline-block; background: rgba(68,195,255,.18); color: #e6f6ff; border: 1px solid rgba(68,195,255,.40); border-radius: 12px; padding: 10px 12px; font-weight: 700; text-align: center; }
.news-list h3 { margin: 0 0 6px; font-size: 18px; }
.news-list p { margin: 0; color: var(--muted); }

/* Contact */
.contact-block { background: var(--card); border: 1px solid var(--border); border-radius: 18px; padding: 16px; }
.contact-form { margin-top: 20px; background: var(--panel); border: 1px solid var(--border); border-radius: 18px; padding: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 12px; }
input, textarea { width: 100%; background: #0f141a; border: 1px solid var(--border); color: var(--text); border-radius: 14px; padding: 10px 12px; font: inherit; outline: none; }
input::placeholder, textarea::placeholder { color: #98a9b8; }
input:focus, textarea:focus { border-color: rgba(68,195,255,.7); box-shadow: 0 0 0 3px rgba(68,195,255,.22); }
textarea { resize: vertical; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: #0a0e12; }
.footer-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; padding: 32px 0 10px; }
.footer-brand p { color: var(--muted); margin: 8px 0 0; }
.footer-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.footer-nav h4 { margin: 0 0 10px; font-size: 14px; color: #eaf2f8; }
.footer-nav ul { list-style: none; margin: 0; padding: 0; }
.footer-nav a { color: var(--muted); text-decoration: none; }
.footer-nav a:hover { color: var(--text); }
.icp { text-align: center; padding: 10px 0 24px; color: var(--muted); font-size: 13px; }

/* Responsive */
@media (max-width: 920px) {
	.grid.two { grid-template-columns: 1fr; }
	.grid.three { grid-template-columns: 1fr 1fr; }
	.stats { grid-template-columns: 1fr 1fr; }
	.news-list li { grid-template-columns: 1fr; }
	.form-row { grid-template-columns: 1fr; }
	.footer-inner { grid-template-columns: 1fr; }
	.footer-nav { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
	.nav-toggle { display: inline-block; }
	.site-nav { display: none; position: absolute; top: 64px; right: 20px; left: 20px; background: var(--panel); border: 1px solid var(--border); border-radius: 16px; }
	.site-nav.open { display: block; }
	.site-nav ul { display: grid; gap: 0; }
	.site-nav a { display: block; padding: 12px 14px; border-bottom: 1px solid var(--border); }
	.site-nav li:last-child a { border-bottom: 0; }
	.grid.three { grid-template-columns: 1fr; }
	.footer-nav { grid-template-columns: 1fr; }
}