/* ============================================================
   STUDY//HUB · K12 学习资源导航站
   蒸汽波 · 深紫粉渐变 · 复古未来 · 网格地平线 · 发光字
   严格使用给定色值，圆角统一 6px
   ============================================================ */

:root{
  /* ---- 规范配色 ---- */
  --c-primary:#bc4fe3;      /* 主色 紫 */
  --c-secondary:#7fd241;    /* 辅助色 绿 */
  --c-accent:#55f160;       /* 强调色 荧光绿 */
  --c-bg:#140e15;           /* 页面背景 */
  --c-surface:#211a23;      /* 卡片/表面 */
  --c-text:#f1eef2;         /* 正文文字 */
  --c-text-dim:#a898ae;     /* 次要文字 */
  --c-border:#3c3040;       /* 描边 */

  /* ---- 由主色派生的同系色（紫色渐变用，不引入异色系） ---- */
  --c-pink:#e49bf7;
  --c-pink-light:#f3c9fb;
  --c-purple-deep:#8f3fce;
  --c-bg-deep:#0d0a0f;
  --c-primary-soft:rgba(188,79,227,.12);
  --c-primary-mid:rgba(188,79,227,.45);
  --c-primary-glow:rgba(188,79,227,.6);
  --c-accent-soft:rgba(85,241,96,.1);
  --c-accent-glow:rgba(85,241,96,.5);
  --c-secondary-glow:rgba(127,210,65,.4);

  --r:6px;
  --font-head:'Poppins','Noto Sans SC',system-ui,-apple-system,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'JetBrains Mono','Fira Code',ui-monospace,'SFMono-Regular','Courier New',monospace;
  --grad-main:linear-gradient(90deg,var(--c-primary),var(--c-pink) 45%,var(--c-pink-light) 70%,var(--c-secondary));
  --shadow-card:0 18px 50px rgba(0,0,0,.4);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

html{scroll-behavior:smooth}

body{
  font-family:var(--font-mono);
  background:var(--c-bg);
  color:var(--c-text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

a{color:inherit}
img{max-width:100%;display:block}
button{font-family:inherit}
::selection{background:rgba(188,79,227,.45);color:var(--c-text)}

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

::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--c-bg)}
::-webkit-scrollbar-thumb{background:var(--c-border);border-radius:var(--r)}
::-webkit-scrollbar-thumb:hover{background:var(--c-primary)}

/* ============================================================
   背景场景：天空 + 星星 + 太阳 + 光斑 + 地平线 + 透视网格 + 噪点
   ============================================================ */
.scene{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}

.scene__sky{position:absolute;inset:0;background:
  radial-gradient(120% 70% at 50% -12%, rgba(188,79,227,.4), transparent 55%),
  radial-gradient(80% 45% at 82% 18%, rgba(85,241,96,.07), transparent 60%),
  linear-gradient(180deg, var(--c-bg-deep) 0%, #1b101f 38%, #2a1734 57%, var(--c-bg) 61.8%);}

.scene__stars{position:absolute;inset:0 0 42% 0;background-image:
  radial-gradient(1px 1px at 12% 22%, #f1eef2, transparent 55%),
  radial-gradient(1px 1px at 28% 12%, #e49bf7, transparent 55%),
  radial-gradient(1.5px 1.5px at 42% 30%, #f1eef2, transparent 60%),
  radial-gradient(1px 1px at 55% 16%, #f1eef2, transparent 55%),
  radial-gradient(1.5px 1.5px at 68% 26%, #e49bf7, transparent 60%),
  radial-gradient(1px 1px at 80% 12%, #f1eef2, transparent 55%),
  radial-gradient(1px 1px at 90% 24%, #f1eef2, transparent 55%),
  radial-gradient(1.5px 1.5px at 33% 8%, #f1eef2, transparent 60%),
  radial-gradient(1px 1px at 74% 6%, #e49bf7, transparent 55%);
  animation:twinkle 5s ease-in-out infinite alternate;}

.scene__sun{position:absolute;left:50%;top:5%;width:min(44vw,340px);height:44vh;transform:translateX(-50%);
  border-radius:50%;
  background:linear-gradient(180deg,#f3c9fb 0%,#e49bf7 26%,var(--c-primary) 58%,var(--c-purple-deep) 100%);
  -webkit-mask-image:repeating-linear-gradient(to bottom,#000 0 13px,transparent 13px 22px);
  mask-image:repeating-linear-gradient(to bottom,#000 0 13px,transparent 13px 22px);
  box-shadow:0 0 90px rgba(188,79,227,.55), 0 0 180px rgba(188,79,227,.25);
  animation:sunPulse 6s ease-in-out infinite alternate;}

.scene__blob{position:absolute;border-radius:50%;filter:blur(48px);opacity:.5;pointer-events:none}
.scene__blob--a{width:42vmax;height:42vmax;left:-12vmax;top:22%;background:radial-gradient(circle at 40% 40%, rgba(188,79,227,.5), transparent 65%);animation:floatA 18s ease-in-out infinite}
.scene__blob--b{width:38vmax;height:38vmax;right:-12vmax;top:48%;background:radial-gradient(circle at 60% 40%, rgba(85,241,96,.16), rgba(127,210,65,.08), transparent 65%);animation:floatB 22s ease-in-out infinite}

.scene__horizon{position:absolute;left:0;right:0;top:61.8%;height:2px;background:linear-gradient(90deg,transparent,var(--c-primary) 18%,rgba(241,238,242,.95) 50%,var(--c-primary) 82%,transparent);
  box-shadow:0 0 16px rgba(188,79,227,.95), 0 0 42px rgba(188,79,227,.55), 0 0 80px rgba(188,79,227,.3);}
.scene__horizon::before{content:"";position:absolute;left:0;right:0;top:-120px;height:120px;background:linear-gradient(180deg,transparent,rgba(188,79,227,.12))}

.scene__grid{position:absolute;left:-30%;right:-30%;top:61.8%;height:60%;
  background-image:
    linear-gradient(to right, rgba(188,79,227,.4) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(188,79,227,.4) 1px, transparent 1px);
  background-size:46px 46px;
  transform:perspective(460px) rotateX(64deg) scale(1.7);
  transform-origin:50% 0;
  animation:gridMove 24s linear infinite;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9) 0%,rgba(0,0,0,.35) 55%,transparent 100%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9) 0%,rgba(0,0,0,.35) 55%,transparent 100%);}

.noise{position:fixed;inset:0;z-index:5;pointer-events:none;opacity:.06;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E")}

/* ============================================================
   布局
   ============================================================ */
.shell{max-width:1180px;margin:0 auto;padding-left:20px;padding-right:20px}
main{position:relative;z-index:2;padding-bottom:30px}

/* ---- 页头 ---- */
.site-header{position:sticky;top:0;z-index:20;background:rgba(20,14,21,.78);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid rgba(60,48,64,.6)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 20px}

.logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.logo__mark{font-size:20px;color:var(--c-accent);text-shadow:0 0 14px rgba(85,241,96,.7)}
.logo__text{font-family:var(--font-head);font-weight:700;font-size:17px;letter-spacing:.14em;
  background:var(--grad-main);-webkit-background-clip:text;background-clip:text;color:transparent}
.logo__slash{color:var(--c-secondary)}

.site-nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.nav-link{font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;color:var(--c-text-dim);text-decoration:none;padding:9px 12px;border-radius:var(--r);border-bottom:2px solid transparent;transition:color .2s,text-shadow .2s,border-color .2s,background .2s}
.nav-link:hover{color:var(--c-text);text-shadow:0 0 12px rgba(188,79,227,.7)}
.nav-link.active{color:var(--c-text);border-bottom-color:var(--c-accent);text-shadow:0 0 14px rgba(85,241,96,.55)}
.nav-link--cta{color:var(--c-accent);border:1px solid rgba(85,241,96,.45);border-bottom-width:1px}
.nav-link--cta:hover{border-color:var(--c-accent);background:rgba(85,241,96,.1)}
.nav-link--cta.active{border-bottom-color:var(--c-accent)}

/* ============================================================
   Hero
   ============================================================ */
.hero{padding:56px 0 30px;text-align:center;max-width:880px;margin:0 auto}
.hero__kicker{font-size:12px;letter-spacing:.42em;color:var(--c-accent);text-transform:uppercase;margin-bottom:18px;text-shadow:0 0 14px rgba(85,241,96,.45)}
.hero__title{font-family:var(--font-head);font-weight:800;line-height:1.12;font-size:clamp(2.4rem,7vw,4.2rem);letter-spacing:.01em;
  background:var(--grad-main);-webkit-background-clip:text;background-clip:text;color:transparent;-webkit-text-fill-color:transparent;
  filter:drop-shadow(0 0 22px rgba(188,79,227,.5));animation:fadeUp .6s ease both}
.hero__sub{font-size:15px;color:var(--c-text-dim);line-height:1.7;margin-top:18px;animation:fadeUp .6s .08s ease both}
.hero__sub b{color:var(--c-accent);font-weight:700;text-shadow:0 0 10px rgba(85,241,96,.4)}

.hero-search{display:flex;gap:12px;max-width:640px;margin:30px auto 0;animation:fadeUp .6s .14s ease both}
.hero-search input{flex:1;min-width:0}

.hero-stats{margin-top:26px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap;animation:fadeUp .6s .2s ease both}
.stat{font-size:13px;color:var(--c-text-dim);border:1px solid var(--c-border);padding:8px 16px;border-radius:var(--r);background:rgba(33,26,35,.6);display:inline-flex;align-items:baseline;gap:6px}
.stat__num{color:var(--c-accent);font-weight:700;font-style:normal;text-shadow:0 0 12px rgba(85,241,96,.5)}

/* ---- 走马灯 ---- */
.ticker{margin:26px 0;border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border);background:rgba(33,26,35,.6);overflow:hidden;position:relative;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.ticker__track{display:flex;white-space:nowrap;width:max-content;animation:ticker 32s linear infinite}
.ticker__track span{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--c-text-dim);padding-right:34px}
.ticker__track b{color:var(--c-primary);font-weight:400;text-shadow:0 0 10px rgba(188,79,227,.6)}

/* ============================================================
   面板 / 筛选 / 卡片
   ============================================================ */
.panel{position:relative;background:rgba(33,26,35,.85);border:1px solid var(--c-border);border-radius:var(--r);padding:22px;margin-bottom:60px;box-shadow:var(--shadow-card)}
.panel::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--c-primary),var(--c-pink),var(--c-secondary));border-radius:var(--r) var(--r) 0 0}

.panel__head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.panel__title{font-family:var(--font-head);font-weight:700;font-size:20px;letter-spacing:.04em}
.panel__count{font-family:var(--font-mono);font-size:12px;color:var(--c-text-dim)}

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

.filters{display:grid;gap:12px}
.filter-row{display:flex;gap:14px;align-items:flex-start;flex-wrap:wrap}
.filter-label{font-size:12px;color:var(--c-text-dim);letter-spacing:.14em;padding-top:8px;min-width:36px;text-align:right}

.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:12.5px;color:var(--c-text-dim);background:transparent;border:1px solid var(--c-border);border-radius:var(--r);padding:7px 13px;cursor:pointer;transition:.2s;letter-spacing:.02em;user-select:none}
.chip:hover{border-color:var(--c-primary);color:var(--c-text);transform:translateY(-1px)}
.chip.active{background:linear-gradient(135deg,var(--c-primary),var(--c-pink));color:var(--c-bg);border-color:transparent;font-weight:700;box-shadow:0 0 16px rgba(188,79,227,.55)}
.chip__count{font-size:10.5px;opacity:.75;margin-left:2px}
.chip.active .chip__count{opacity:.85}

.chip-choice{position:relative}
.chip-choice input{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none}
.chip-choice.active::after{content:"✓";font-size:11px;font-weight:700}

/* ---- 资源卡片 ---- */
.grid{margin-top:20px;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}

.card{position:relative;display:flex;flex-direction:column;gap:12px;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r);padding:18px 18px 14px;overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  animation:fadeUp .5s cubic-bezier(.2,.7,.3,1) both;animation-delay:calc(var(--i,0)*45ms)}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--c-primary),var(--c-pink),var(--c-secondary));opacity:.85}
.card:hover{transform:translateY(-5px);border-color:rgba(188,79,227,.75);box-shadow:0 14px 44px rgba(188,79,227,.28),var(--shadow-card)}

.card__top{display:flex;justify-content:space-between;align-items:center;gap:10px}
.badges{display:flex;gap:6px;flex-wrap:wrap}
.badge{font-size:11px;letter-spacing:.06em;padding:3px 8px;border-radius:var(--r);border:1px solid var(--c-border);color:var(--c-text-dim)}
.badge--type{color:var(--c-pink-light);border-color:rgba(188,79,227,.55);background:rgba(188,79,227,.12)}
.badge--free{color:var(--c-accent);border-color:rgba(85,241,96,.5);background:var(--c-accent-soft)}
.badge--hot{color:var(--c-secondary);border-color:rgba(127,210,65,.5);background:rgba(127,210,65,.1)}
.badge--part{color:var(--c-text-dim);border-color:var(--c-border);background:transparent}

.fav{background:none;border:none;color:var(--c-text-dim);font-size:16px;cursor:pointer;line-height:1;padding:4px;border-radius:var(--r);transition:.2s}
.fav:hover{color:var(--c-pink-light);text-shadow:0 0 12px rgba(188,79,227,.8)}
.fav.on{color:var(--c-accent);text-shadow:0 0 12px rgba(85,241,96,.8)}

.card__name{font-family:var(--font-head);font-weight:600;font-size:16px;line-height:1.35;margin:0}
.card__name a{color:var(--c-text);text-decoration:none;transition:color .2s}
.card__name a:hover{color:var(--c-accent)}

.card__desc{font-size:12.5px;color:var(--c-text-dim);line-height:1.65;margin:0;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

.card__tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{font-size:11px;color:var(--c-text-dim);border:1px solid var(--c-border);padding:2px 8px;border-radius:var(--r)}
.tag--subj{color:var(--c-pink-light);border-color:rgba(188,79,227,.4)}

.card__foot{margin-top:auto;padding-top:12px;border-top:1px dashed var(--c-border);display:flex;justify-content:space-between;align-items:center}
.card__meta{font-size:11px;color:var(--c-text-dim)}
.card__meta b{color:var(--c-text);font-weight:500}
.card__go{font-size:12px;color:var(--c-accent);text-decoration:none;letter-spacing:.04em;transition:.2s}
.card__go:hover{text-shadow:0 0 12px rgba(85,241,96,.8)}

mark{background:rgba(85,241,96,.28);color:var(--c-accent);padding:0 2px;border-radius:2px}

/* ---- 空状态 ---- */
.empty{text-align:center;padding:48px 20px;color:var(--c-text-dim)}
.empty__icon{font-size:42px;color:var(--c-primary);text-shadow:0 0 18px rgba(188,79,227,.6);margin-bottom:10px}
.empty__title{font-family:var(--font-head);font-size:16px;color:var(--c-text);margin-bottom:6px}
.empty__hint{font-size:12px}

/* ============================================================
   搜索页
   ============================================================ */
.page-head{padding:48px 0 10px;text-align:center}
.page-title{font-family:var(--font-head);font-weight:800;font-size:clamp(1.8rem,4.5vw,2.6rem);
  background:var(--grad-main);-webkit-background-clip:text;background-clip:text;color:transparent;-webkit-text-fill-color:transparent;
  filter:drop-shadow(0 0 18px rgba(188,79,227,.45));animation:fadeUp .6s ease both}
.page-sub{font-size:13px;color:var(--c-text-dim);line-height:1.8;margin:14px auto 0;max-width:560px;animation:fadeUp .6s .08s ease both}

.search-bar{display:flex;gap:12px;max-width:640px;margin:26px auto 0}
.search-bar input{flex:1;min-width:0}

.hot{margin:18px auto 0;max-width:640px;display:flex;gap:12px;align-items:center;flex-wrap:wrap;justify-content:center}
.hot__label{font-size:12px;color:var(--c-text-dim);letter-spacing:.14em}

.result-note{text-align:center;font-size:13px;color:var(--c-text-dim);margin:22px 0 6px}
.result-note b{color:var(--c-accent);font-weight:700}

/* ============================================================
   表单 / 提交页
   ============================================================ */
.panel--form{max-width:720px;margin:26px auto 60px;text-align:left}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field--full{grid-column:1/-1}

.field__label{display:block;font-size:12px;color:var(--c-text-dim);letter-spacing:.08em;margin-bottom:8px}
.field__label em{color:var(--c-accent);font-style:normal}

.field__input,.select{width:100%;font-family:var(--font-mono);font-size:14px;color:var(--c-text);background:var(--c-bg);border:1px solid var(--c-border);border-radius:var(--r);padding:13px 16px;outline:none;transition:border-color .2s,box-shadow .2s}
.field__input:focus,.select:focus,.hero-search input:focus,.search-bar input:focus{border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(188,79,227,.18),0 0 22px rgba(188,79,227,.35)}
.field__input::placeholder{color:rgba(168,152,174,.6)}
textarea.field__input{resize:vertical;min-height:88px}

.select{appearance:none;-webkit-appearance:none;padding-right:38px;cursor:pointer;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23bc4fe3' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center}
.select option{background:var(--c-surface);color:var(--c-text)}

.field__error{font-size:12px;color:var(--c-pink-light);margin:6px 0 0;min-height:16px;text-shadow:0 0 8px rgba(243,201,251,.4)}
.field__count{display:block;text-align:right;font-size:11px;color:var(--c-text-dim);margin-top:6px}
.field--bottom{display:flex;align-items:flex-end;padding-bottom:4px}

.check{display:inline-flex;align-items:center;gap:8px;cursor:pointer;font-size:12.5px;color:var(--c-text-dim);user-select:none}
.check input{position:absolute;opacity:0;width:1px;height:1px}
.check span{display:inline-flex;align-items:center;gap:8px}
.check span::before{content:"";width:16px;height:16px;border:1px solid var(--c-border);border-radius:4px;background:var(--c-surface);transition:.2s;display:inline-block;box-sizing:border-box}
.check input:checked + span{color:var(--c-text)}
.check input:checked + span::before{background:linear-gradient(135deg,var(--c-accent),var(--c-secondary));border-color:transparent;box-shadow:0 0 10px rgba(85,241,96,.5)}
.check input:focus-visible + span::before{outline:2px solid var(--c-accent);outline-offset:2px}

.form-actions{margin-top:22px;display:flex;gap:12px;flex-wrap:wrap}
.form-note{font-size:12px;color:var(--c-text-dim);line-height:1.8;margin:14px 0 0}
.form-note code{color:var(--c-pink-light)}

.submit-ok{border:1px solid rgba(85,241,96,.55);background:rgba(85,241,96,.08);color:var(--c-text);padding:18px;border-radius:var(--r);margin:20px 0 0;display:none;animation:fadeUp .4s ease both}
.submit-ok.show{display:block}
.submit-ok b{color:var(--c-accent)}
.submit-ok .btn{margin-top:14px}

.pending-title{font-family:var(--font-head);font-size:16px;letter-spacing:.05em;margin:30px 0 14px}
.pending-title::before{content:"▸ ";color:var(--c-accent)}
#pending-list .form-note{margin:0}
.pending-item{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:12px 14px;border:1px solid var(--c-border);border-radius:var(--r);margin-bottom:10px;background:rgba(33,26,35,.6);animation:fadeUp .4s ease both}
.pending-item b{font-size:13px}
.pending-item small{font-size:11px;color:var(--c-text-dim);display:block;margin-top:4px;line-height:1.6}
.pending-status{font-size:11px;color:var(--c-secondary);border:1px solid rgba(127,210,65,.5);padding:3px 8px;border-radius:var(--r);white-space:nowrap;background:rgba(127,210,65,.08)}

/* ============================================================
   按钮
   ============================================================ */
.btn{font-family:var(--font-mono);font-weight:700;border-radius:var(--r);border:1px solid transparent;cursor:pointer;transition:.2s;font-size:14px;padding:13px 24px;letter-spacing:.02em;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:linear-gradient(135deg,var(--c-primary),var(--c-pink));color:var(--c-bg);box-shadow:0 6px 24px rgba(188,79,227,.4)}
.btn--primary:hover{box-shadow:0 10px 30px rgba(188,79,227,.55)}
.btn--accent{background:linear-gradient(135deg,var(--c-accent),var(--c-secondary));color:var(--c-bg);box-shadow:0 6px 24px rgba(85,241,96,.35)}
.btn--accent:hover{box-shadow:0 10px 32px rgba(85,241,96,.5)}
.btn--ghost{background:transparent;color:var(--c-text);border-color:var(--c-border)}
.btn--ghost:hover{border-color:var(--c-primary);color:var(--c-pink-light)}

/* ============================================================
   页脚 / 提示
   ============================================================ */
.site-footer{margin-top:30px;border-top:1px solid var(--c-border);background:rgba(20,14,21,.6);position:relative;z-index:2}
.footer-inner{text-align:center;padding:28px 20px 34px}
.footer__brand{font-family:var(--font-head);font-weight:700;font-size:14px;letter-spacing:.12em;background:var(--grad-main);-webkit-background-clip:text;background-clip:text;color:transparent}
.footer__note{margin:10px auto 0;font-size:12px;color:var(--c-text-dim);line-height:1.8;max-width:640px}
.footer__note code{color:var(--c-pink-light)}
.footer__meta{margin:12px 0 0;font-size:11px;color:var(--c-text-dim);opacity:.75}

.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(20px);background:var(--c-surface);border:1px solid rgba(85,241,96,.6);color:var(--c-text);padding:12px 22px;border-radius:var(--r);box-shadow:0 10px 34px rgba(0,0,0,.5),0 0 24px rgba(85,241,96,.25);font-size:13px;opacity:0;pointer-events:none;transition:.3s;z-index:50;max-width:90vw}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ============================================================
   动画
   ============================================================ */
@keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
@keyframes gridMove{from{background-position:0 0}to{background-position:0 46px}}
@keyframes ticker{to{transform:translateX(-50%)}}
@keyframes twinkle{from{opacity:.5}to{opacity:1}}
@keyframes sunPulse{from{opacity:.82}to{opacity:1}}
@keyframes floatA{0%,100%{transform:translate(0,0)}50%{transform:translate(18px,-26px)}}
@keyframes floatB{0%,100%{transform:translate(0,0)}50%{transform:translate(-22px,18px)}}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:900px){
  .grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
}

@media (max-width:720px){
  .header-inner{flex-direction:column;gap:10px;padding:12px 20px}
  .site-nav{gap:2px}
  .nav-link{padding:7px 10px;font-size:12px}
  .hero{padding:40px 0 24px}
  .hero__kicker{letter-spacing:.28em}
  .hero-search{flex-direction:column}
  .hero-search .btn,.search-bar .btn{width:100%}
  .search-bar{flex-direction:column}
  .panel{padding:16px}
  .toolbar{width:100%;justify-content:space-between}
  .filter-label{min-width:0;text-align:left}
  .form-grid{grid-template-columns:1fr}
  .stat{padding:6px 12px;font-size:12px}
  .ticker__track span{font-size:11px}
  .panel__head{align-items:flex-start}
}

@media (max-width:420px){
  .logo__text{font-size:15px;letter-spacing:.1em}
  .hero__kicker{letter-spacing:.18em;font-size:11px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001s !important;animation-iteration-count:1 !important;transition-duration:.001s !important;scroll-behavior:auto !important}
  .scene__grid{animation:none}
}