/* SPACEMANSLOT — 卷轴横幅式（深空蓝黑 #0D0F1F / 上升薄荷 #7DF9C6）
   母题：数字滚带（乘数递增）+ slot 符号 + 霓虹薄荷光效。类名一律 sp- 前缀。 */

:root {
  --sp-bg: #0D0F1F;
  --sp-bg2: #111527;
  --sp-bg3: #171B31;
  --sp-line: #232946;
  --sp-ac: #7DF9C6;
  --sp-ac-dim: #4cc9a2;
  --sp-gold: #F2C94C;
  --sp-tx: #E8ECF7;
  --sp-tx2: #9AA3BF;
  --sp-mono: "Space Mono", "Courier New", monospace;
  --sp-body: "Hind", "Segoe UI", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--sp-bg);
  color: var(--sp-tx);
  font-family: var(--sp-body);
  font-size: 17px;
  line-height: 1.75;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--sp-ac); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { font-family: var(--sp-mono); font-weight: 700; line-height: 1.3; }
h1 { font-size: 30px; letter-spacing: -0.5px; }
h2 { font-size: 23px; margin-bottom: 14px; }
h3 { font-size: 18px; }

/* ---------- 顶栏 ---------- */

.sp-head {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(13, 15, 31, 0.94);
  border-bottom: 1px solid var(--sp-line);
  backdrop-filter: blur(6px);
}

.sp-headin {
  max-width: 1180px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 22px;
}

.sp-logo { display: inline-flex; align-items: center; gap: 10px; }
.sp-logo:hover { text-decoration: none; }

.sp-logo-orbit {
  display: inline-flex;
  gap: 2px;
  padding: 4px 6px;
  border: 1px solid var(--sp-ac);
  border-radius: 8px;
  background: var(--sp-bg2);
  font-family: var(--sp-mono);
  font-size: 12px;
  color: var(--sp-gold);
  box-shadow: 0 0 12px rgba(125, 249, 198, 0.25);
}

.sp-logo-word {
  font-family: var(--sp-mono);
  font-weight: 700;
  font-size: 18px;
  color: var(--sp-tx);
  letter-spacing: 1px;
}

.sp-nav { margin-left: auto; display: flex; gap: 18px; font-weight: 600; }
.sp-nav a { color: var(--sp-tx2); font-size: 15px; }
.sp-nav a:hover, .sp-nav a.sp-on { color: var(--sp-ac); text-decoration: none; }

.sp-hact { display: flex; gap: 10px; }

.sp-btn {
  display: inline-block;
  font-family: var(--sp-mono);
  font-size: 14px;
  font-weight: 700;
  padding: 9px 18px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}

.sp-btn-main {
  background: linear-gradient(160deg, var(--sp-ac), #4fd8ac);
  color: #07130f;
  box-shadow: 0 0 16px rgba(125, 249, 198, 0.35);
}
.sp-btn-main:hover { text-decoration: none; filter: brightness(1.08); }

.sp-btn-ghost {
  background: transparent;
  color: var(--sp-ac);
  border-color: var(--sp-ac-dim);
}
.sp-btn-ghost:hover { text-decoration: none; background: rgba(125, 249, 198, 0.08); }

.sp-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  border: 1px solid var(--sp-line);
  border-radius: 8px;
}
.sp-burger span { width: 20px; height: 2px; background: var(--sp-ac); display: block; }

.sp-navtog { display: none; }

.sp-mnav {
  display: none;
  border-top: 1px solid var(--sp-line);
  background: var(--sp-bg2);
  padding: 16px 20px 22px;
}
.sp-mgrp { margin-top: 12px; }
.sp-mgrp h3 { color: var(--sp-gold); font-size: 13px; text-transform: uppercase; letter-spacing: 2px; }
.sp-mgrp a { display: block; padding: 7px 0; color: var(--sp-tx); border-bottom: 1px dashed var(--sp-line); }

#sp-navtog:checked ~ .sp-mnav { display: block; }

/* ---------- 首页 hero：上升曲线 ---------- */

.sp-main { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

.sp-hero {
  padding: 52px 0 30px;
  background:
    radial-gradient(600px 300px at 82% 12%, rgba(125, 249, 198, 0.10), transparent 70%),
    radial-gradient(500px 260px at 8% 85%, rgba(242, 201, 76, 0.05), transparent 70%);
  border-bottom: 1px solid var(--sp-line);
}

.sp-herowrap {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 34px;
  align-items: center;
}

.sp-kicker {
  font-family: var(--sp-mono);
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--sp-gold);
  border-left: 3px solid var(--sp-ac);
  padding-left: 10px;
  margin-bottom: 14px;
}

.sp-herop { color: var(--sp-tx2); margin: 16px 0 22px; }

.sp-heroact { display: flex; flex-wrap: wrap; gap: 12px; }

.sp-curve {
  position: relative;
  border: 1px solid var(--sp-line);
  border-radius: 16px;
  background: linear-gradient(180deg, var(--sp-bg2), var(--sp-bg));
  padding: 18px 14px 12px;
  box-shadow: inset 0 0 30px rgba(125, 249, 198, 0.06);
}

.sp-curve svg { width: 100%; height: 210px; display: block; }

.sp-curve-line {
  fill: none;
  stroke: var(--sp-ac);
  stroke-width: 4;
  filter: drop-shadow(0 0 6px rgba(125, 249, 198, 0.8));
}

.sp-curve-ghost {
  fill: none;
  stroke: rgba(125, 249, 198, 0.25);
  stroke-width: 2;
  stroke-dasharray: 5 7;
}

.sp-rocket {
  position: absolute;
  right: 52px;
  top: 22px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--sp-gold);
  box-shadow: 0 0 14px 4px rgba(242, 201, 76, 0.55);
  animation: sp-pulse 2.6s ease-in-out infinite;
}
.sp-rocket-b { right: 90px; top: 40px; background: var(--sp-ac); animation-delay: 1.3s; }

@keyframes sp-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: 0.65; }
}

.sp-reads {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 12px;
}

.sp-read {
  border: 1px dashed var(--sp-line);
  border-radius: 8px;
  padding: 6px 8px;
  text-align: center;
  background: var(--sp-bg);
}
.sp-read b { font-family: var(--sp-mono); color: var(--sp-ac); display: block; font-size: 15px; }
.sp-read small { color: var(--sp-tx2); font-size: 11px; }

/* ---------- Pita Kurva：数字滚带 ---------- */

.sp-pita {
  border-top: 1px solid var(--sp-line);
  border-bottom: 1px solid var(--sp-line);
  background: linear-gradient(180deg, var(--sp-bg3), var(--sp-bg2));
  overflow: hidden;
}

.sp-pitarow {
  list-style: none;
  display: flex;
  width: max-content;
  animation: sp-roll 26s linear infinite;
}

.sp-pitacell {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 26px;
  border-right: 1px solid var(--sp-line);
  font-family: var(--sp-mono);
}

.sp-pitacell b { color: var(--sp-ac); font-size: 17px; text-shadow: 0 0 10px rgba(125, 249, 198, 0.5); }
.sp-pitacell i { font-style: normal; color: var(--sp-gold); font-size: 15px; }

@keyframes sp-roll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------- 区块 A：kelas 卡片 ---------- */

.sp-kelas, .sp-tentang, .sp-adv, .sp-terpilih, .sp-faqsec, .sp-trust { padding: 46px 0 34px; }

.sp-kelasp { color: var(--sp-tx2); max-width: 760px; margin-bottom: 26px; }

.sp-kelasgrid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 18px;
}

.sp-kartu {
  position: relative;
  border: 1px solid var(--sp-line);
  border-radius: 14px;
  background: linear-gradient(175deg, var(--sp-bg2), var(--sp-bg));
  padding: 22px 20px 18px;
  overflow: hidden;
}

.sp-kartu::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--sp-ac), transparent);
}

.sp-kartu-no {
  position: absolute;
  right: 14px;
  top: 10px;
  font-family: var(--sp-mono);
  font-size: 34px;
  color: rgba(125, 249, 198, 0.12);
}

.sp-kartu h3 a { color: var(--sp-tx); }
.sp-kartu h3 a:hover { color: var(--sp-ac); text-decoration: none; }
.sp-kartu p { color: var(--sp-tx2); font-size: 15px; margin: 10px 0 14px; }

.sp-kartu-more { font-family: var(--sp-mono); font-size: 13px; }
.sp-kartu-more:hover { text-decoration: none; letter-spacing: 0.5px; }

/* ---------- 区块 B：tentang + adv ---------- */

.sp-tentang { border-top: 1px solid var(--sp-line); }
.sp-tentang p { color: var(--sp-tx2); max-width: 860px; margin-bottom: 14px; }

.sp-herofig { margin: 26px 0 0; border: 1px solid var(--sp-line); border-radius: 14px; overflow: hidden; background: var(--sp-bg2); }
.sp-herofig img { width: 100%; }
.sp-herofig figcaption { padding: 10px 16px; color: var(--sp-tx2); font-size: 13px; border-top: 1px solid var(--sp-line); }

.sp-advlist { list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px; counter-reset: sp-adv; }

.sp-advlist li {
  counter-increment: sp-adv;
  border: 1px solid var(--sp-line);
  border-left: 3px solid var(--sp-gold);
  border-radius: 10px;
  padding: 16px 18px;
  background: var(--sp-bg2);
}

.sp-advlist h3::before { content: counter(sp-adv, decimal-leading-zero); margin-right: 8px; color: var(--sp-gold); }
.sp-advlist p { color: var(--sp-tx2); font-size: 15px; margin-top: 6px; }

/* ---------- 区块 C：picks ---------- */

.sp-terpilih { border-top: 1px solid var(--sp-line); }

.sp-pickgrid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }

.sp-pick {
  border: 1px solid var(--sp-line);
  border-radius: 14px;
  padding: 20px;
  background: radial-gradient(240px 120px at 90% 0%, rgba(125, 249, 198, 0.08), transparent 70%), var(--sp-bg2);
}
.sp-pick h3 a { color: var(--sp-tx); font-size: 17px; }
.sp-pick h3 a:hover { color: var(--sp-ac); text-decoration: none; }
.sp-pick p { color: var(--sp-tx2); font-size: 15px; margin: 10px 0 12px; }
.sp-pickmore { font-family: var(--sp-mono); font-size: 13px; }

/* ---------- FAQ ---------- */

.sp-faqsec { border-top: 1px solid var(--sp-line); }

.sp-q {
  border: 1px solid var(--sp-line);
  border-radius: 10px;
  background: var(--sp-bg2);
  margin-bottom: 10px;
  overflow: hidden;
}

.sp-q summary {
  cursor: pointer;
  list-style: none;
  padding: 14px 18px;
  font-weight: 600;
  color: var(--sp-tx);
  position: relative;
  padding-right: 40px;
}
.sp-q summary::-webkit-details-marker { display: none; }
.sp-q summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 12px;
  font-family: var(--sp-mono);
  color: var(--sp-ac);
  font-size: 18px;
}
.sp-q[open] summary::after { content: "\2212"; }
.sp-q p { padding: 0 18px 14px; color: var(--sp-tx2); font-size: 15px; }

/* ---------- trust ---------- */

.sp-trust {
  border-top: 1px solid var(--sp-line);
  border-bottom: 1px solid var(--sp-line);
  background: linear-gradient(180deg, rgba(242, 201, 76, 0.05), transparent);
}
.sp-trust p { color: var(--sp-tx2); max-width: 860px; }
.sp-trustlnk { display: inline-block; margin-top: 12px; font-family: var(--sp-mono); font-size: 14px; }

/* ---------- 内页 ---------- */

.sp-paper { max-width: 900px; margin: 0 auto; padding: 30px 20px 50px; }

.sp-crumbs { font-size: 13px; color: var(--sp-tx2); margin-bottom: 18px; }
.sp-crumbs a { color: var(--sp-tx2); }
.sp-crumbs a:hover { color: var(--sp-ac); }

.sp-navintro, .sp-edulead { color: var(--sp-tx2); font-size: 18px; margin-bottom: 20px; }

.sp-navpage h2, .sp-edu h2 { margin-top: 28px; font-size: 20px; }

.sp-steps { list-style: none; counter-reset: sp-step; }
.sp-steps li {
  counter-increment: sp-step;
  position: relative;
  padding: 14px 16px 14px 62px;
  border: 1px solid var(--sp-line);
  border-radius: 10px;
  margin-bottom: 10px;
  background: var(--sp-bg2);
}
.sp-steps li::before {
  content: counter(sp-step);
  position: absolute;
  left: 16px;
  top: 14px;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--sp-bg);
  border: 1px solid var(--sp-ac-dim);
  color: var(--sp-ac);
  font-family: var(--sp-mono);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sp-steps p { color: var(--sp-tx2); font-size: 15px; margin-top: 4px; }

.sp-navlist { list-style: none; }
.sp-navlist li {
  padding: 10px 14px;
  border-left: 3px solid var(--sp-ac);
  background: var(--sp-bg2);
  margin-bottom: 8px;
  border-radius: 0 8px 8px 0;
  color: var(--sp-tx2);
  font-size: 15px;
}
.sp-navlist b { color: var(--sp-tx); }

.sp-note {
  border: 1px dashed var(--sp-gold);
  border-radius: 10px;
  padding: 14px 18px;
  margin-top: 22px;
  color: var(--sp-tx2);
  background: rgba(242, 201, 76, 0.05);
}

.sp-navaside {
  margin-top: 30px;
  border: 1px solid var(--sp-line);
  border-radius: 12px;
  background: var(--sp-bg2);
  padding: 16px 18px;
}
.sp-navaside h3 { color: var(--sp-gold); font-size: 14px; text-transform: uppercase; letter-spacing: 1.5px; margin: 10px 0 6px; }
.sp-navaside a { display: block; padding: 6px 0; color: var(--sp-tx2); font-size: 15px; }
.sp-navaside a:hover { color: var(--sp-ac); }

.sp-edu p { color: var(--sp-tx2); margin-bottom: 14px; }

.sp-fig {
  margin: 24px 0;
  border: 1px solid var(--sp-line);
  border-radius: 14px;
  overflow: hidden;
  background: var(--sp-bg2);
}
.sp-fig img { width: 100%; }
.sp-fig figcaption { padding: 10px 16px; font-size: 13px; color: var(--sp-tx2); border-top: 1px solid var(--sp-line); }

.sp-resp {
  margin-top: 28px;
  padding: 12px 16px;
  border-radius: 10px;
  background: var(--sp-bg3);
  color: var(--sp-tx2);
  font-size: 14px;
  border: 1px solid var(--sp-line);
}

/* ---------- 404 ---------- */

.sp-404body { background: var(--sp-bg); }
.sp-404 { max-width: 720px; margin: 0 auto; padding: 70px 20px 90px; text-align: center; }

.sp-404curve {
  display: flex;
  justify-content: center;
  gap: 18px;
  font-family: var(--sp-mono);
  font-size: 30px;
  color: var(--sp-ac);
  margin-bottom: 22px;
}
.sp-404curve span:nth-child(2) { color: #e2606e; }
.sp-404curve span:last-child { color: var(--sp-gold); }

.sp-404 p { color: var(--sp-tx2); margin: 14px 0 24px; }
.sp-404act { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }

/* ---------- 页脚 ---------- */

.sp-foot { border-top: 1px solid var(--sp-line); background: var(--sp-bg2); margin-top: 30px; }

.sp-fgrid {
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px 20px 26px;
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 26px;
}

.sp-fbrand p { color: var(--sp-tx2); font-size: 14px; margin: 12px 0; }
.sp-fcol h3 { color: var(--sp-gold); font-size: 13px; text-transform: uppercase; letter-spacing: 2px; margin-bottom: 8px; }
.sp-fcol a { display: block; padding: 5px 0; color: var(--sp-tx2); font-size: 14px; }
.sp-fcol a:hover { color: var(--sp-ac); }

.sp-18 {
  display: inline-block;
  border: 2px solid var(--sp-gold);
  color: var(--sp-gold);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  line-height: 40px;
  text-align: center;
  font-family: var(--sp-mono);
  font-weight: 700;
}

.sp-fbot { border-top: 1px solid var(--sp-line); padding: 16px 20px; text-align: center; }
.sp-fbot p { color: var(--sp-tx2); font-size: 13px; }

/* ---------- 底部悬浮条（唯一外链白名单） ---------- */

.sp-float {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 80;
  background: rgba(13, 15, 31, 0.96);
  border-top: 1px solid var(--sp-ac-dim);
  box-shadow: 0 -6px 24px rgba(125, 249, 198, 0.15);
}

.sp-floatin {
  max-width: 720px;
  margin: 0 auto;
  padding: 9px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.sp-mult { font-family: var(--sp-mono); color: var(--sp-tx2); font-size: 13px; }

.sp-blink { color: var(--sp-ac); animation: sp-flash 1.4s steps(2, start) infinite; }

@keyframes sp-flash { 50% { opacity: 0.25; } }

body { padding-bottom: 64px; }

/* ---------- 响应式 ---------- */

@media (max-width: 1024px) {
  .sp-nav { display: none; }
  .sp-burger { display: flex; }
  .sp-herowrap { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .sp-fgrid { grid-template-columns: 1fr 1fr; }
  .sp-hero { padding: 34px 0 22px; }
  .sp-kelas, .sp-tentang, .sp-adv, .sp-terpilih, .sp-faqsec, .sp-trust { padding: 32px 0 24px; }
  .sp-herowrap { gap: 22px; }
}

@media (max-width: 480px) {
  body { font-size: 16px; }
  h1 { font-size: 24px; }
  h2 { font-size: 20px; }
  .sp-headin { gap: 10px; padding: 10px 14px; }
  .sp-hact .sp-btn-ghost { display: none; }
  .sp-logo-word { font-size: 15px; }
  .sp-main { padding: 0 14px; }
  .sp-paper { padding: 22px 14px 40px; }
  .sp-fgrid { grid-template-columns: 1fr; gap: 18px; }
  .sp-reads { grid-template-columns: repeat(3, 1fr); gap: 6px; }
  .sp-read b { font-size: 12px; }
  .sp-read small { font-size: 10px; }
  .sp-pitacell { padding: 10px 16px; }
  .sp-floatin { gap: 10px; }
  .sp-mult { display: none; }
  .sp-steps li { padding-left: 56px; }
}