:root{
  --bg:#0d0f0e;
  --panel:#151a17;
  --panel2:#1b211d;
  --line:#28312b;
  --txt:#e7ede8;
  --dim:#94a29a;
  --accent:#8ee04a;
  --accent2:#cfe873;
  --warn:#e6b544;
  --bad:#e0715f;
  --ok:#5cc98d;
  --max:780px;
  --wide:1080px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg)}
body{
  margin:0;background:transparent;color:var(--txt);
  font:16px/1.78 -apple-system,"Segoe UI","Helvetica Neue","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
  position:relative;
}
/* 全站页面顶部的淡背景：内页没有 hero 时靠它撑住第一屏的质感 */
body::before{content:"";position:absolute;top:0;left:0;right:0;height:640px;z-index:-1;pointer-events:none;
  background-image:url(hero-town.webp);
  background-size:cover;background-position:center 34%;background-repeat:no-repeat;
  opacity:.27;
  -webkit-mask-image:linear-gradient(180deg, rgba(0,0,0,.95) 0%, rgba(0,0,0,.55) 55%, transparent 100%);
  mask-image:linear-gradient(180deg, rgba(0,0,0,.95) 0%, rgba(0,0,0,.55) 55%, transparent 100%);}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--wide);margin:0 auto;padding:0 22px}
.narrow{max-width:var(--max);margin:0 auto}

/* ---------- header ---------- */
.site-head{border-bottom:1px solid var(--line);background:rgba(11,13,12,.92);position:sticky;top:0;z-index:20;backdrop-filter:blur(10px);
  box-shadow:0 10px 30px rgba(0,0,0,.45)}
.site-head .wrap{display:flex;align-items:center;gap:20px;height:58px;flex-wrap:nowrap}
.brand{display:flex;align-items:baseline;gap:10px;font-weight:700;letter-spacing:.02em;text-decoration:none;flex:none}
.brand:hover{text-decoration:none}
.brand .mark{color:var(--accent);font-size:17px}
.brand .sub{color:var(--dim);font-size:12px;font-weight:400;letter-spacing:.08em;text-transform:uppercase}
.site-nav{display:flex;gap:18px;font-size:13.5px;margin-left:auto}
.site-nav a{color:var(--dim)}
.site-nav a:hover{color:var(--txt);text-decoration:none}
.lang-switch{display:flex;gap:2px;border:1px solid var(--line);border-radius:999px;padding:3px;background:var(--panel)}
.lang-switch a{font-size:12px;line-height:1;padding:6px 10px;border-radius:999px;color:var(--dim);text-decoration:none}
.lang-switch a:hover{color:var(--txt);text-decoration:none}
.lang-switch a.active{background:var(--accent);color:#0b1207;font-weight:700}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:#0a0c0b}
.hero .bg{position:absolute;inset:0;
  background-image:url(hero-town.webp);
  background-size:cover;background-position:center 42%;background-repeat:no-repeat;
  filter:saturate(.96) contrast(1.06) brightness(1.02);
}
/* 三层遮罩：左侧保文字、上下渐隐接到页面底色、右下角暗角压住水印 */
.hero .bg::after{content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg, rgba(10,12,11,.93) 0%, rgba(10,12,11,.74) 32%, rgba(10,12,11,.20) 64%, rgba(10,12,11,.46) 100%),
    linear-gradient(180deg, rgba(10,12,11,.64) 0%, rgba(10,12,11,.38) 38%, rgba(10,12,11,.26) 70%, rgba(10,12,11,.80) 92%, var(--bg) 100%),
    radial-gradient(circle at 100% 100%, rgba(8,10,9,1) 0%, rgba(8,10,9,.92) 10%, rgba(8,10,9,.40) 21%, transparent 33%);
}
/* 极细颗粒，压掉数码感 */
.hero .bg::before{content:"";position:absolute;inset:0;z-index:1;opacity:.14;mix-blend-mode:overlay;pointer-events:none;
  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='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");}
.hero .inner{position:relative;z-index:2;padding:118px 0 96px}
.hero .kicker{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;color:#b7e88a;
  border:1px solid rgba(142,224,74,.32);background:rgba(16,24,14,.72);backdrop-filter:blur(8px);
  padding:6px 13px;border-radius:999px;letter-spacing:.04em}
.hero h1{font-size:clamp(30px,4.4vw,50px);line-height:1.14;letter-spacing:-.022em;margin:20px 0 16px;max-width:820px;
  text-shadow:0 2px 24px rgba(0,0,0,.55)}
.hero h1 em{font-style:normal;color:#d7f0a0;text-shadow:0 2px 28px rgba(142,224,74,.22)}
.hero .lead{font-size:17px;color:#c8d2ca;max-width:640px;margin:0 0 26px;text-shadow:0 1px 10px rgba(0,0,0,.5)}
.hero .facts{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.hero .facts div{font-size:12.5px;color:#b9c4bc;border:1px solid rgba(255,255,255,.10);
  background:rgba(16,20,18,.66);backdrop-filter:blur(8px);padding:7px 13px;border-radius:8px}
.hero .facts b{color:var(--accent2)}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:10px;font-size:14.5px;font-weight:700;
  border:1px solid transparent;cursor:pointer;transition:.16s;font-family:inherit}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn.primary{background:var(--accent);color:#0b1207}
.btn.primary:hover{background:var(--accent2)}
.btn.ghost{background:transparent;border-color:var(--line);color:var(--txt)}
.btn.ghost:hover{border-color:#3c5138;background:var(--panel)}

/* ---------- sections ---------- */
.sec{padding:56px 0;border-top:1px solid var(--line)}
.sec-tex{position:relative;overflow:hidden;isolation:isolate}
.sec-tex::before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-image:url(map-tile.webp);
  background-size:384px auto;background-repeat:repeat;
  opacity:.075;
  -webkit-mask-image:linear-gradient(180deg, transparent, #000 16%, #000 84%, transparent);
  mask-image:linear-gradient(180deg, transparent, #000 16%, #000 84%, transparent);}
.sec-head{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;margin-bottom:6px}
.sec-head .num{font-size:12px;font-weight:800;color:var(--accent);border:1px solid #33502a;background:#14200f;padding:3px 9px;border-radius:6px}
.sec-head h2{margin:0;font-size:clamp(21px,2.6vw,27px);letter-spacing:-.01em;border:none;padding:0}
.sec-sub{color:var(--dim);font-size:14.5px;margin:8px 0 24px;max-width:760px}

/* 章节横幅：标题压在图上 */
.sec-banner{position:relative;border-radius:14px;overflow:hidden;margin:0 0 26px;
  border:1px solid var(--line);min-height:220px;display:flex;align-items:flex-end;isolation:isolate;
  box-shadow:0 18px 44px -22px rgba(0,0,0,.85)}
.sec-banner .sc-bg{position:absolute;inset:0;z-index:-1;
  background-size:cover;background-position:center 55%;background-repeat:no-repeat;
  filter:saturate(.95) contrast(1.05) brightness(1.10);
  transition:transform .6s cubic-bezier(.2,.7,.3,1)}
.sec-banner:hover .sc-bg{transform:scale(1.025)}
/* 只在左下角（文字所在处）加重，其余放图 */
.sec-banner .sc-bg::after{content:"";position:absolute;inset:0;
  background:
    linear-gradient(90deg, rgba(9,11,10,.84) 0%, rgba(9,11,10,.38) 44%, transparent 68%),
    linear-gradient(0deg, rgba(9,11,10,.92) 0%, rgba(9,11,10,.42) 36%, transparent 74%),
    radial-gradient(circle at 100% 100%, rgba(8,10,9,.88) 0%, rgba(8,10,9,.32) 12%, transparent 26%)}
.sec-banner .sc-in{position:relative;z-index:2;padding:26px 28px 24px;width:100%;
  display:grid;grid-template-columns:auto 1fr;align-items:baseline;gap:0 14px}
.sec-banner .num{font-size:12px;font-weight:800;color:var(--accent);border:1px solid #33502a;
  background:rgba(16,24,14,.9);padding:3px 9px;border-radius:6px;justify-self:start;align-self:center}
.sec-banner h2{margin:0;font-size:clamp(20px,2.5vw,27px);letter-spacing:-.015em;line-height:1.25;
  border:none;padding:0;text-shadow:0 2px 18px rgba(0,0,0,.7)}
.sec-banner .sc-sub{grid-column:1 / -1;margin:9px 0 0;font-size:13.5px;line-height:1.6;
  color:#ccd6ce;max-width:620px;text-shadow:0 1px 12px rgba(0,0,0,.85)}

/* ---------- body text ---------- */
main{padding:0}
.content{padding:34px 0 70px}
.crumbs{font-size:12.5px;color:var(--dim);margin-bottom:18px}
.crumbs a{color:var(--dim)}
.crumbs span{margin:0 7px;color:#3d4a42}

h1{font-size:33px;line-height:1.25;letter-spacing:-.015em;margin:0 0 14px}
h2{font-size:22px;margin:44px 0 14px;padding-left:13px;border-left:3px solid var(--accent);letter-spacing:-.01em}
h3{font-size:16.5px;margin:26px 0 8px;color:var(--accent2)}
p{margin:12px 0}
.lead{font-size:17.5px;color:#cfd8d1;margin:0 0 18px}

/* ---------- badges ---------- */
.badges{display:flex;flex-wrap:wrap;align-items:flex-start;gap:8px;margin:18px 0 26px}
.badge{flex:none;font-size:12px;line-height:1.6;padding:4px 11px;border-radius:999px;border:1px solid var(--line);color:var(--dim);background:var(--panel)}
.badge.live{color:var(--accent);border-color:#33502a;background:#14200f}
.badge.flag-warn{color:var(--warn);border-color:#584521;background:#211a0d}

/* ---------- boxes ---------- */
.box{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:16px 20px;margin:22px 0}
.box h4{margin:0 0 8px;font-size:14px;letter-spacing:.06em;text-transform:uppercase;color:var(--dim)}
.tldr{background:linear-gradient(180deg,#16200f,#131813);border:1px solid #2f4a22;border-radius:10px;padding:18px 22px;margin:24px 0}
.tldr b{color:var(--accent2)}
.tip{border-left:3px solid var(--ok);background:#101a14;border-radius:0 8px 8px 0;padding:13px 18px;margin:18px 0}
.warn{border-left:3px solid var(--warn);background:#1a1509;border-radius:0 8px 8px 0;padding:13px 18px;margin:18px 0}
.danger{border-left:3px solid var(--bad);background:#1a100e;border-radius:0 8px 8px 0;padding:13px 18px;margin:18px 0}
.tip b,.warn b,.danger b{color:var(--txt)}

/* ---------- toc ---------- */
.toc{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:16px 20px;margin:26px 0}
.toc div{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--dim);margin-bottom:8px}
.toc ol{margin:0;padding-left:20px;font-size:14.5px}
.toc li{margin:4px 0}

/* ---------- tables ---------- */
.table-scroll{overflow-x:auto;margin:20px 0;-webkit-overflow-scrolling:touch}
.table-scroll table{margin:0}
table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px;background:var(--panel);border-radius:10px;overflow:hidden}
th,td{padding:10px 13px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:var(--panel2);color:var(--accent2);font-size:12.5px;font-weight:600;letter-spacing:.04em;text-transform:uppercase}
tbody tr:nth-child(even){background:#12161440}
tr:last-child td{border-bottom:none}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}

/* ---------- lists ---------- */
ul,ol{padding-left:22px;margin:12px 0}
li{margin:6px 0}

/* ---------- faq ---------- */
details{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:13px 18px;margin:10px 0}
details summary{cursor:pointer;font-weight:600;font-size:15px;list-style:none}
details summary::-webkit-details-marker{display:none}
details summary::before{content:"+ ";color:var(--accent)}
details[open] summary::before{content:"– "}
details p{margin:10px 0 0;color:#cfd8d1;font-size:14.5px}

/* ---------- cards ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px;margin:22px 0}
.card{display:block;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:16px 18px;transition:border-color .15s,transform .15s}
.card:hover{border-color:#3c5138;text-decoration:none;transform:translateY(-2px)}
.card .t{font-weight:600;color:var(--txt);margin-bottom:4px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.card .d{font-size:13px;color:var(--dim);line-height:1.6}
.card .diff{font-size:11px;font-weight:600;padding:1px 7px;border-radius:999px;border:1px solid var(--line);color:var(--dim)}
.card .diff.easy{color:var(--ok);border-color:#2a4a37}
.card .diff.mid{color:var(--warn);border-color:#584521}
.card .diff.hard{color:var(--bad);border-color:#5a2b25}

/* ---------- tools ---------- */
.tools{display:grid;grid-template-columns:repeat(auto-fit,minmax(420px,1fr));gap:16px;margin:26px 0 8px}
.tool{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px 22px;display:flex;flex-direction:column}
.tool-h{display:flex;align-items:center;gap:10px;margin-bottom:4px}
.tool-h .tag{font-size:11px;font-weight:800;color:var(--accent);border:1px solid #33502a;background:#14200f;padding:2px 7px;border-radius:5px;font-variant-numeric:tabular-nums}
.tool-h h3{margin:0;font-size:16px;color:var(--txt)}
.tool-d{font-size:13px;color:var(--dim);margin:0 0 16px;line-height:1.6}
.tool-body{flex:1;display:flex;flex-direction:column;gap:12px}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:12.5px;color:var(--dim);letter-spacing:.02em}
.field .row{display:flex;align-items:center;gap:10px}
.field output{font-size:13px;color:var(--accent2);font-variant-numeric:tabular-nums;min-width:44px;text-align:right}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:4px;border-radius:2px;background:#2b342e;outline:none}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:15px;height:15px;border-radius:50%;background:var(--accent);cursor:pointer;border:2px solid #0d0f0e}
input[type=range]::-moz-range-thumb{width:13px;height:13px;border-radius:50%;background:var(--accent);cursor:pointer;border:2px solid #0d0f0e}
select{background:#101412;border:1px solid var(--line);color:var(--txt);padding:8px 10px;border-radius:8px;font-size:13.5px;font-family:inherit;outline:none;width:100%}
select:focus{border-color:#3c5138}
.chks{display:grid;grid-template-columns:1fr 1fr;gap:6px 10px}
.chk{display:flex;align-items:flex-start;gap:7px;font-size:13px;color:#cfd8d1;cursor:pointer;line-height:1.45}
.chk input{accent-color:var(--accent);margin:3px 0 0;flex:none}
.result{margin-top:14px;border-top:1px solid var(--line);padding-top:14px;font-size:13.5px}
.result .score{font-size:26px;font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums;line-height:1.2}
.result .verdict{font-size:13px;color:var(--txt);margin:2px 0 10px}
.meter{height:6px;border-radius:3px;background:#232a26;overflow:hidden;margin:8px 0 4px}
.meter i{display:block;height:100%;background:linear-gradient(90deg,var(--ok),var(--accent2));transition:width .25s}
.meter.low i{background:linear-gradient(90deg,#a85b3f,var(--warn))}
.tool .btn{align-self:flex-start;padding:8px 14px;font-size:13px}
.tool-note{font-size:11.5px;color:#6f7d74;margin-top:auto;padding-top:12px}

/* ---------- plan output ---------- */
.plan{display:flex;flex-direction:column;gap:8px}
.plan .wk{border:1px solid var(--line);border-radius:8px;padding:11px 14px;background:#121614}
.plan .wk b{display:block;font-size:12.5px;color:var(--accent2);letter-spacing:.03em;margin-bottom:3px}
.plan .wk span{font-size:13px;color:#c4cec7}

/* ---------- checklist ---------- */
.bag-group{margin-bottom:12px}
.bag-group h4{margin:0 0 6px;font-size:12px;letter-spacing:.07em;text-transform:uppercase;color:var(--dim)}
.bag .chk{font-size:13px}
.bag-progress{display:flex;align-items:center;gap:10px;margin:4px 0 14px;font-size:12.5px;color:var(--dim)}
.bag-progress .meter{flex:1;margin:0}

/* ---------- guides list ---------- */
.glist{display:flex;flex-direction:column;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:22px 0}
.gitem{display:flex;gap:14px;align-items:baseline;padding:13px 18px;background:var(--panel);transition:background .15s;text-decoration:none}
.gitem:hover{background:var(--panel2);text-decoration:none}
.gitem .st{font-size:11px;font-weight:700;padding:2px 7px;border-radius:4px;flex:none;letter-spacing:.04em}
.gitem .st.live{color:var(--accent);background:#14200f;border:1px solid #33502a}
.gitem .st.next{color:var(--warn);background:#211a0d;border:1px solid #584521}
.gitem .nm{display:block;font-size:14.5px;color:var(--txt)}
.gitem .dsc{display:block;font-size:12.5px;color:var(--dim);margin-top:2px}
.gitem .arw{margin-left:auto;color:#3d4a42;font-size:14px;flex:none}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);padding:26px 0 46px;color:var(--dim);font-size:13px;margin-top:20px}
footer p{margin:6px 0;max-width:820px}
footer a{color:var(--dim);text-decoration:underline}

/* ---------- misc ---------- */
code{background:#090b0a;border:1px solid var(--line);padding:1px 6px;border-radius:4px;font-size:13px;color:var(--accent2)}
.small{font-size:13px;color:var(--dim)}
hr{border:none;border-top:1px solid var(--line);margin:36px 0}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .brand .sub{display:none}
}
@media (max-width:760px){
  table{font-size:13px}
  th,td{padding:9px 10px}
  /* 窄屏没有左右空间，遮罩改为上下压暗，让图均匀透出来 */
  .hero .bg{background-position:center 38%}
  .hero .bg::after{background:
    linear-gradient(180deg, rgba(10,12,11,.74) 0%, rgba(10,12,11,.56) 42%, rgba(10,12,11,.70) 74%, var(--bg) 100%),
    radial-gradient(circle at 100% 100%, rgba(8,10,9,1) 0%, rgba(8,10,9,.9) 12%, transparent 32%);}
  body::before{height:480px;opacity:.20}
  .site-head .wrap{height:auto;padding:10px 18px;flex-wrap:wrap;gap:10px}
  .site-nav{order:3;width:100%;gap:14px;overflow-x:auto;padding-bottom:2px}
  .lang-switch{margin-left:auto}
  .hero .inner{padding:56px 0 44px}
  .sec{padding:40px 0}
  .tools{grid-template-columns:1fr}
  .chks{grid-template-columns:1fr}
  h1{font-size:26px}
  h2{font-size:19px}
  .gitem{flex-wrap:wrap;gap:6px}
}