:root,:root[data-theme=default]{--text: #fff;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-full: 9999px;--white-90: rgba(255, 255, 255, .9);--white-85: rgba(255, 255, 255, .85);--white-80: rgba(255, 255, 255, .8);--white-75: rgba(255, 255, 255, .75);--white-70: rgba(255, 255, 255, .7);--white-60: rgba(255, 255, 255, .6);--white-50: rgba(255, 255, 255, .5);--white-40: rgba(255, 255, 255, .4);--border: rgba(255, 255, 255, .08);--border-strong: rgba(255, 255, 255, .1);--hover-bg: rgba(255, 255, 255, .08);--bubble-bg: #383850}:root,:root[data-theme=default]{--bg: #1e1e2f;--gray: #2d2d3f;--panel: #383850;--grad-card: linear-gradient(145deg, #2d2d3f 0%, #1e1e2f 100%);--grad-page: radial-gradient(700px 420px at 90% -10%, rgba(155, 123, 255, .18), transparent 60%), radial-gradient(600px 360px at -10% 30%, rgba(99, 184, 255, .14), transparent 60%), #1e1e2f;--blue: #63b8ff;--blue-2: #4f9df0;--glow-blue: 0 0 15px rgba(99, 184, 255, .5);--tint-blue: rgba(99, 184, 255, .2);--purple: #9b7bff;--purple-2: #7e5ef2;--glow-purple: 0 0 15px rgba(155, 123, 255, .3);--tint-purple: rgba(155, 123, 255, .2);--pink: #ff8ac9;--pink-2: #ff6fb4;--glow-pink: 0 0 20px rgba(255, 138, 201, .6);--tint-pink: rgba(255, 138, 201, .2);--border-pink: rgba(255, 138, 201, .5);--bg-pink-soft: rgba(255, 138, 201, .08);--accent: #ff68b0;--glow-accent: 0 0 12px rgba(255, 104, 176, .25);--glow-accent-strong: 0 0 22px rgba(255, 104, 176, .6);--danger: #ff5b5b;--danger-bg: rgba(255, 91, 91, .1);--danger-border: rgba(255, 91, 91, .3);--grad-brand: linear-gradient(135deg, #63b8ff 0%, #9b7bff 50%, #ff8ac9 100%);--grad-bot: linear-gradient(135deg, #2688e6 0%, #7048ff 50%, #e63e92 100%);--grad-user: linear-gradient(135deg, #8262ff, #ff68b0);--grad-btn-blue: linear-gradient(135deg, #63b8ff, #4f9df0);--grad-btn-pink: linear-gradient(135deg, #ff8ac9, #ff6fb4);--overlay-strong: rgba(30, 30, 47, .85);--overlay-soft: rgba(30, 30, 47, .5);--aura: rgba(155, 123, 255, .12);--star-1: rgba(255, 138, 201, .4);--star-2: rgba(99, 184, 255, .35);--star-3: rgba(155, 123, 255, .3);--star-4: rgba(255, 255, 255, .25);--glow-title: 0 2px 8px rgba(99, 184, 255, .5)}:root[data-theme=midnight]{--bg: #0b1324;--gray: #141f33;--panel: #1b2b45;--grad-card: linear-gradient(145deg, #141f33 0%, #0b1324 100%);--grad-page: radial-gradient(700px 420px at 90% -10%, rgba(123, 139, 255, .24), transparent 60%), radial-gradient(600px 360px at -10% 30%, rgba(63, 195, 240, .2), transparent 60%), #0b1324;--blue: #3fc3f0;--blue-2: #2aa8df;--glow-blue: 0 0 15px rgba(63, 195, 240, .5);--tint-blue: rgba(63, 195, 240, .2);--purple: #7b8bff;--purple-2: #6670ff;--glow-purple: 0 0 15px rgba(123, 139, 255, .3);--tint-purple: rgba(123, 139, 255, .2);--pink: #ff6fa3;--pink-2: #ff4f8b;--glow-pink: 0 0 20px rgba(255, 111, 163, .6);--tint-pink: rgba(255, 111, 163, .2);--border-pink: rgba(255, 111, 163, .5);--bg-pink-soft: rgba(255, 111, 163, .08);--accent: #ff6fa3;--glow-accent: 0 0 12px rgba(255, 111, 163, .25);--glow-accent-strong: 0 0 22px rgba(255, 111, 163, .6);--danger: #ff5c5c;--danger-bg: rgba(255, 92, 92, .1);--danger-border: rgba(255, 92, 92, .3);--grad-brand: linear-gradient(135deg, #3fc3f0 0%, #7b8bff 50%, #ff6fa3 100%);--grad-bot: linear-gradient(135deg, #1f6fd0 0%, #6670ff 50%, #f04f9a 100%);--grad-user: linear-gradient(135deg, #6670ff, #ff6fa3);--grad-btn-blue: linear-gradient(135deg, #3fc3f0, #2aa8df);--grad-btn-pink: linear-gradient(135deg, #ff6fa3, #ff4f8b);--overlay-strong: rgba(11, 19, 36, .85);--overlay-soft: rgba(11, 19, 36, .5);--aura: rgba(63, 195, 240, .18);--star-1: rgba(255, 111, 163, .4);--star-2: rgba(63, 195, 240, .35);--star-3: rgba(123, 139, 255, .3);--star-4: rgba(255, 255, 255, .22);--glow-title: 0 2px 8px rgba(63, 195, 240, .5)}:root[data-theme=aurora]{--bg: #07231a;--gray: #12352a;--panel: #1a4a3a;--grad-card: linear-gradient(145deg, #12352a 0%, #07231a 100%);--grad-page: radial-gradient(700px 420px at 90% -10%, rgba(79, 224, 168, .22), transparent 60%), radial-gradient(600px 360px at -10% 30%, rgba(59, 214, 189, .2), transparent 60%), #07231a;--blue: #3bd6bd;--blue-2: #26b8a5;--glow-blue: 0 0 15px rgba(59, 214, 189, .5);--tint-blue: rgba(59, 214, 189, .2);--purple: #7f9bff;--purple-2: #6a7dff;--glow-purple: 0 0 15px rgba(127, 155, 255, .3);--tint-purple: rgba(127, 155, 255, .2);--pink: #4fe0a8;--pink-2: #2fce91;--glow-pink: 0 0 20px rgba(79, 224, 168, .6);--tint-pink: rgba(79, 224, 168, .2);--border-pink: rgba(79, 224, 168, .5);--bg-pink-soft: rgba(79, 224, 168, .08);--accent: #4fe0a8;--glow-accent: 0 0 12px rgba(79, 224, 168, .25);--glow-accent-strong: 0 0 22px rgba(79, 224, 168, .6);--danger: #ff6b5e;--danger-bg: rgba(255, 107, 94, .1);--danger-border: rgba(255, 107, 94, .3);--grad-brand: linear-gradient(135deg, #3bd6bd 0%, #7f9bff 50%, #4fe0a8 100%);--grad-bot: linear-gradient(135deg, #14b59b 0%, #6a7dff 50%, #2fc48a 100%);--grad-user: linear-gradient(135deg, #6a7dff, #4fe0a8);--grad-btn-blue: linear-gradient(135deg, #3bd6bd, #26b8a5);--grad-btn-pink: linear-gradient(135deg, #4fe0a8, #2fce91);--overlay-strong: rgba(7, 35, 26, .85);--overlay-soft: rgba(7, 35, 26, .5);--aura: rgba(59, 214, 189, .18);--star-1: rgba(79, 224, 168, .4);--star-2: rgba(59, 214, 189, .35);--star-3: rgba(127, 155, 255, .3);--star-4: rgba(255, 255, 255, .22);--glow-title: 0 2px 8px rgba(59, 214, 189, .5)}:root[data-theme=sunset]{--bg: #2a1113;--gray: #3b1f21;--panel: #4c2b2a;--grad-card: linear-gradient(145deg, #3b1f21 0%, #2a1113 100%);--grad-page: radial-gradient(700px 420px at 90% -10%, rgba(255, 95, 144, .22), transparent 60%), radial-gradient(600px 360px at -10% 30%, rgba(255, 161, 77, .26), transparent 60%), #2a1113;--blue: #ffa14d;--blue-2: #ff8430;--glow-blue: 0 0 15px rgba(255, 161, 77, .5);--tint-blue: rgba(255, 161, 77, .2);--purple: #ff5f90;--purple-2: #ff3d78;--glow-purple: 0 0 15px rgba(255, 95, 144, .3);--tint-purple: rgba(255, 95, 144, .2);--pink: #ff7f6b;--pink-2: #ff5a4a;--glow-pink: 0 0 20px rgba(255, 127, 107, .6);--tint-pink: rgba(255, 127, 107, .2);--border-pink: rgba(255, 127, 107, .5);--bg-pink-soft: rgba(255, 127, 107, .08);--accent: #ff7f6b;--glow-accent: 0 0 12px rgba(255, 127, 107, .25);--glow-accent-strong: 0 0 22px rgba(255, 127, 107, .6);--danger: #ff4d4d;--danger-bg: rgba(255, 77, 77, .1);--danger-border: rgba(255, 77, 77, .3);--grad-brand: linear-gradient(135deg, #ffa14d 0%, #ff5f90 50%, #ff7f6b 100%);--grad-bot: linear-gradient(135deg, #f08a24 0%, #ff3d78 50%, #ff4f6e 100%);--grad-user: linear-gradient(135deg, #ff5f90, #ff7f6b);--grad-btn-blue: linear-gradient(135deg, #ffa14d, #ff8430);--grad-btn-pink: linear-gradient(135deg, #ff7f6b, #ff5a4a);--overlay-strong: rgba(42, 17, 19, .85);--overlay-soft: rgba(42, 17, 19, .5);--aura: rgba(255, 161, 77, .18);--star-1: rgba(255, 127, 107, .4);--star-2: rgba(255, 161, 77, .35);--star-3: rgba(255, 95, 144, .3);--star-4: rgba(255, 255, 255, .22);--glow-title: 0 2px 8px rgba(255, 161, 77, .5)}:root[data-theme=light]{--text: #23262e;--bg: #f5f6fb;--gray: #ffffff;--panel: #ffffff;--grad-card: linear-gradient(145deg, #ffffff 0%, #eef0f8 100%);--grad-page: radial-gradient(700px 420px at 90% -10%, rgba(124, 92, 240, .14), transparent 60%), radial-gradient(600px 360px at -10% 30%, rgba(59, 130, 246, .12), transparent 60%), #f5f6fb;--blue: #3b82f6;--blue-2: #2563eb;--glow-blue: 0 0 15px rgba(59, 130, 246, .4);--tint-blue: rgba(59, 130, 246, .14);--purple: #7c5cf0;--purple-2: #6650e6;--glow-purple: 0 0 15px rgba(124, 92, 240, .25);--tint-purple: rgba(124, 92, 240, .14);--pink: #ef5da8;--pink-2: #e8427f;--glow-pink: 0 0 20px rgba(239, 93, 168, .45);--tint-pink: rgba(239, 93, 168, .14);--border-pink: rgba(239, 93, 168, .4);--bg-pink-soft: rgba(239, 93, 168, .08);--accent: #e73b86;--glow-accent: 0 0 12px rgba(231, 59, 134, .22);--glow-accent-strong: 0 0 22px rgba(231, 59, 134, .45);--danger: #e53935;--danger-bg: rgba(229, 57, 53, .09);--danger-border: rgba(229, 57, 53, .28);--grad-brand: linear-gradient(135deg, #3b82f6 0%, #7c5cf0 50%, #e73b86 100%);--grad-bot: linear-gradient(135deg, #2f80ed 0%, #7048ff 50%, #eb479b 100%);--grad-user: linear-gradient(135deg, #7048ff, #e73b86);--grad-btn-blue: linear-gradient(135deg, #3b82f6, #2563eb);--grad-btn-pink: linear-gradient(135deg, #ef5da8, #e8427f);--overlay-strong: rgba(255, 255, 255, .85);--overlay-soft: rgba(255, 255, 255, .6);--aura: rgba(124, 92, 240, .1);--star-1: rgba(239, 93, 168, .35);--star-2: rgba(59, 130, 246, .3);--star-3: rgba(124, 92, 240, .3);--star-4: rgba(80, 80, 90, .2);--glow-title: 0 2px 8px rgba(59, 130, 246, .35);--white-90: rgba(35, 38, 46, .9);--white-85: rgba(35, 38, 46, .85);--white-80: rgba(35, 38, 46, .8);--white-75: rgba(35, 38, 46, .75);--white-70: rgba(35, 38, 46, .7);--white-60: rgba(35, 38, 46, .6);--white-50: rgba(35, 38, 46, .5);--white-40: rgba(35, 38, 46, .4);--border: rgba(20, 25, 35, .09);--border-strong: rgba(20, 25, 35, .14);--hover-bg: rgba(20, 25, 35, .07);--bubble-bg: #e6e9f2}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}a{color:inherit;text-decoration:none}button{font-family:inherit;border:none;background:none;cursor:pointer;color:inherit}img{max-width:100%;display:block}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}[id]{scroll-margin-top:76px}@keyframes fadeUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.animate-fade-up{animation:fadeUp 1s ease-out both}@keyframes floatY{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.section-title{text-align:center;font-size:clamp(1.5rem,4vw,2.5rem);font-weight:700}.section-sub{margin-top:12px;text-align:center;font-size:15px;color:var(--white-60)}@media(max-width:767px){.container{padding:0 16px}}