/* ==========================================================================
   飘雪网盘 · 账号激活引导页
   ========================================================================== */

:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-soft: #f8fafd;
  --ink: #0c1b2a;
  --ink-2: #26384d;
  --muted: #63748a;
  --muted-2: #8593a6;
  --line: #dfe7f2;
  --line-strong: #cbd8e9;
  --navy: #071522;
  --navy-2: #0b2034;
  --brand: #2f6fed;
  --brand-dark: #1f57cc;
  --brand-soft: #ebf2ff;
  --pink: #f06a9b;
  --pink-soft: #fff0f6;
  --cyan: #67d4f1;
  --green: #0f9f6e;
  --green-soft: #e7f8f1;
  --amber: #e4a536;
  --amber-soft: #fff6e3;
  --shadow-sm: 0 4px 16px rgba(20, 47, 82, 0.05);
  --shadow-md: 0 14px 38px rgba(20, 47, 82, 0.08);
  --shadow-lg: 0 28px 80px rgba(8, 30, 58, 0.16);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: clip;
}

body {
  margin: 0;
  background:
    radial-gradient(ellipse 820px 500px at 0% 0%, rgba(47, 111, 237, 0.05), transparent 65%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
h1, h2, h3, p, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; }
::selection { background: rgba(47, 111, 237, 0.18); }

:focus-visible {
  outline: 3px solid rgba(47, 111, 237, 0.42);
  outline-offset: 3px;
  border-radius: 6px;
}

.svg-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.icon {
  width: 19px;
  height: 19px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.shell {
  width: min(1120px, calc(100% - 48px));
  margin-inline: auto;
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 60;
  padding: 16px 0;
  color: #f7fbff;
  transition: background 0.25s ease, padding 0.25s ease, box-shadow 0.25s ease;
}
.site-header.is-scrolled {
  padding: 11px 0;
  background: rgba(7, 21, 34, 0.9);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.07), 0 14px 32px rgba(2, 12, 22, 0.18);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 26px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
}
.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  box-shadow: 0 5px 16px rgba(0, 68, 171, 0.3);
}
.brand-words { display: flex; flex-direction: column; line-height: 1.15; min-width: 0; }
.brand-words strong { font-size: 16.5px; font-weight: 700; letter-spacing: 0.08em; }
.brand-words span {
  margin-top: 3px;
  color: rgba(226, 241, 255, 0.55);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.14em;
  white-space: nowrap;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.site-nav a {
  padding: 8px 12px;
  border-radius: 9px;
  color: rgba(236, 246, 255, 0.72);
  font-size: 13px;
  transition: color 0.18s ease, background 0.18s ease;
}
.site-nav a:hover { color: #fff; background: rgba(255, 255, 255, 0.07); }
.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 7px 14px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #eef7ff;
  font-size: 12px;
  font-weight: 600;
  transition: background 0.18s ease, border-color 0.18s ease;
}
.header-cta .icon { width: 14px; height: 14px; }
.header-cta:hover { background: rgba(255, 255, 255, 0.14); border-color: rgba(255, 255, 255, 0.32); }

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 142px 0 104px;
  background:
    radial-gradient(ellipse 820px 580px at 84% 20%, rgba(47, 111, 237, 0.35), transparent 62%),
    radial-gradient(ellipse 620px 480px at 4% 82%, rgba(240, 106, 155, 0.1), transparent 66%),
    linear-gradient(160deg, #071522 0%, #081a2b 52%, #071827 100%);
  color: #f7fbff;
}
.hero-grid-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(156, 203, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(156, 203, 255, 0.05) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  pointer-events: none;
}
.hero-glow {
  position: absolute;
  z-index: -1;
  top: 70px;
  right: 6%;
  width: 440px;
  height: 440px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(97, 164, 255, 0.2), transparent 68%);
  filter: blur(24px);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(380px, 0.92fr);
  align-items: center;
  gap: 64px;
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 11px;
  color: rgba(211, 235, 255, 0.62);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
}
.eyebrow span {
  width: 30px;
  height: 1px;
  background: linear-gradient(90deg, #77b5ff, transparent);
}
.hero h1 {
  margin: 22px 0 20px;
  font-size: clamp(46px, 5vw, 66px);
  font-weight: 750;
  line-height: 1.12;
  letter-spacing: -0.045em;
}
.hero h1 span {
  background: linear-gradient(100deg, #f5fbff 0%, #b9d8ff 44%, #8cbfff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-lede {
  max-width: 560px;
  color: rgba(223, 240, 255, 0.68);
  font-size: 16px;
  line-height: 1.85;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 30px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 13.5px;
  font-weight: 650;
  line-height: 1.3;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}
.btn .icon { width: 17px; height: 17px; }
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary {
  background: linear-gradient(135deg, #4a86f7, #2765e8);
  color: #fff;
  box-shadow: 0 12px 28px rgba(47, 111, 237, 0.32);
}
.btn-primary:hover { box-shadow: 0 15px 34px rgba(47, 111, 237, 0.42); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.17);
  color: #e9f4ff;
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.11); border-color: rgba(255, 255, 255, 0.3); }
.btn-secondary {
  background: #fff;
  border-color: var(--line-strong);
  color: #3e536a;
}
.btn-secondary:hover { background: #f8fafd; border-color: #b7c9df; }

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  margin-top: 26px;
  color: rgba(225, 242, 255, 0.68);
  font-size: 11.5px;
}
.hero-trust span { display: inline-flex; align-items: center; gap: 6px; }
.hero-trust .icon { width: 14px; height: 14px; color: #79b6ff; }

/* Progress card */
.progress-card {
  position: relative;
  padding: 23px;
  border: 1px solid rgba(176, 213, 255, 0.22);
  border-radius: 24px;
  background:
    radial-gradient(ellipse 300px 180px at 100% 0%, rgba(92, 157, 255, 0.16), transparent 70%),
    linear-gradient(150deg, rgba(18, 48, 78, 0.9), rgba(7, 25, 43, 0.92));
  box-shadow: 0 30px 70px rgba(0, 8, 20, 0.36), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  animation: rise 0.75s 0.15s cubic-bezier(0.2, 0.8, 0.25, 1) both;
}
.progress-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  z-index: -1;
  border-radius: 25px;
  background: linear-gradient(140deg, rgba(124, 182, 255, 0.3), transparent 42%, rgba(240, 106, 155, 0.16));
  opacity: 0.42;
  pointer-events: none;
}
.progress-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: rgba(196, 225, 255, 0.54);
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.14em;
}
.status-pill {
  padding: 4px 8px;
  border: 1px solid rgba(240, 106, 155, 0.3);
  border-radius: 999px;
  background: rgba(240, 106, 155, 0.12);
  color: #ffb4ce;
  font-family: var(--font);
  font-size: 9px;
  letter-spacing: 0;
  white-space: nowrap;
}
.progress-card h2 {
  margin: 13px 0 18px;
  color: #f4faff;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.progress-list { list-style: none; display: grid; gap: 0; }
.progress-list li {
  position: relative;
  display: flex;
  align-items: center;
  gap: 11px;
  min-height: 52px;
  padding: 7px 0;
  color: rgba(218, 238, 255, 0.44);
}
.progress-list li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 36px;
  left: 12px;
  width: 1px;
  height: 24px;
  background: rgba(151, 198, 255, 0.18);
}
.progress-list li:not(:last-child).is-done::after { background: rgba(109, 208, 166, 0.45); }
.progress-dot {
  display: grid;
  place-items: center;
  width: 25px;
  height: 25px;
  flex: none;
  border: 1px solid rgba(159, 204, 255, 0.22);
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 7.5px;
  color: rgba(205, 230, 255, 0.6);
  background: rgba(255, 255, 255, 0.04);
}
.progress-copy { display: flex; flex-direction: column; min-width: 0; line-height: 1.25; }
.progress-copy strong { color: rgba(234, 247, 255, 0.72); font-size: 12.5px; font-weight: 600; }
.progress-copy small { margin-top: 3px; color: rgba(197, 225, 255, 0.4); font-size: 9.5px; }
.progress-list li.is-done .progress-dot {
  border-color: rgba(109, 208, 166, 0.36);
  background: rgba(15, 159, 110, 0.18);
  color: #85e3bd;
}
.progress-list li.is-done .progress-copy strong { color: rgba(234, 247, 255, 0.9); }
.progress-list li.is-current .progress-dot {
  border-color: rgba(240, 106, 155, 0.65);
  background: var(--pink);
  color: #fff;
  box-shadow: 0 0 0 5px rgba(240, 106, 155, 0.12);
}
.progress-list li.is-current .progress-copy strong { color: #fff; }
.progress-list li.is-current .progress-copy small { color: #ffb4ce; }
.progress-icon { width: 15px; height: 15px; margin-left: auto; color: #77d8b3; }
.current-tag {
  margin-left: auto;
  padding: 3px 7px;
  border-radius: 4px;
  background: rgba(240, 106, 155, 0.14);
  color: #ffb4ce;
  font-size: 8.5px;
}
.progress-foot {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 13px;
  padding-top: 13px;
  border-top: 1px solid rgba(171, 211, 255, 0.13);
  color: rgba(191, 222, 255, 0.46);
  font-size: 9.5px;
}
.progress-foot .icon { width: 13px; height: 13px; color: #7db6ff; }
.progress-foot strong { margin-left: auto; color: rgba(236, 248, 255, 0.76); font-size: 10px; font-weight: 650; }

/* ==========================================================================
   Quick strip
   ========================================================================== */

.quick-strip-wrap {
  position: relative;
  z-index: 4;
  margin-top: -38px;
}
.quick-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 8px;
  border: 1px solid rgba(220, 231, 244, 0.9);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.97);
  box-shadow: var(--shadow-md);
}
.quick-strip > div {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 13px 16px;
  border-right: 1px solid var(--line);
}
.quick-strip > div:last-child { border-right: 0; }
.quick-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: none;
  border-radius: 10px;
  background: var(--brand-soft);
  color: var(--brand);
}
.quick-icon .icon { width: 17px; height: 17px; }
.quick-strip > div > span:last-child { display: flex; flex-direction: column; line-height: 1.3; min-width: 0; }
.quick-strip strong { font-size: 12px; font-weight: 650; }
.quick-strip small { margin-top: 2px; color: var(--muted-2); font-size: 10px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ==========================================================================
   Main layout / sections
   ========================================================================== */

.main-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 318px;
  align-items: start;
  gap: 30px;
  padding-top: 56px;
  padding-bottom: 20px;
}
.content { min-width: 0; }
.section-block {
  margin-bottom: 44px;
  scroll-margin-top: 96px;
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 22px;
  margin-bottom: 18px;
}
.section-kicker {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  color: var(--brand);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 650;
  letter-spacing: 0.14em;
}
.section-kicker span {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 17px;
  border-radius: 4px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 8px;
  letter-spacing: 0;
}
.section-head h2 {
  font-size: 28px;
  font-weight: 720;
  line-height: 1.25;
  letter-spacing: -0.035em;
}
.section-head > p {
  padding-bottom: 3px;
  color: var(--muted-2);
  font-size: 11.5px;
  white-space: nowrap;
}

/* Checklist */
.requirement-banner {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 14px;
  padding: 13px 15px;
  border: 1px solid #f0d8a7;
  border-radius: 14px;
  background:
    radial-gradient(ellipse 220px 100px at 100% 0%, rgba(228, 165, 54, 0.1), transparent 70%),
    linear-gradient(135deg, #fff9eb, #fffdf8);
}
.requirement-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: none;
  border-radius: 10px;
  background: #fff1cf;
  color: #b7791f;
}
.requirement-icon .icon { width: 17px; height: 17px; }
.requirement-banner > div { min-width: 0; }
.requirement-banner strong { display: block; color: #5e4513; font-size: 12px; font-weight: 680; }
.requirement-banner p { margin-top: 2px; color: #8a6b2d; font-size: 9.5px; line-height: 1.55; }
.requirement-value {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 56px;
  margin-left: auto;
  padding: 5px 9px;
  border: 1px solid #efd8a8;
  border-radius: 9px;
  background: #fffdf7;
  color: #9a6818;
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.1;
}
.requirement-value small { margin-top: 2px; color: #a58955; font-family: var(--font); font-size: 7.5px; font-weight: 500; letter-spacing: 0.04em; }
.check-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.check-card {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  min-height: 126px;
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}
.check-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: none;
  border-radius: 10px;
  background: var(--brand-soft);
  color: var(--brand);
}
.check-icon .icon { width: 17px; height: 17px; }
.check-card strong { display: block; margin-top: 1px; color: var(--ink-2); font-size: 12px; font-weight: 650; }
.check-card p { margin-top: 5px; color: var(--muted); font-size: 10px; line-height: 1.65; }
.check-mark { position: absolute; top: 15px; right: 14px; width: 15px; height: 15px; color: #b7c8db; }
.check-card:first-child .check-mark,
.check-card:last-child .check-mark { color: var(--green); }
.check-link {
  position: absolute;
  right: 14px;
  bottom: 13px;
  color: var(--brand);
  font-size: 9.5px;
  font-weight: 650;
}
.check-link:hover { text-decoration: underline; text-underline-offset: 2px; }

/* Steps */
.step-list {
  position: relative;
  list-style: none;
  display: grid;
  gap: 10px;
  padding-left: 0;
}
.step-list::before {
  content: "";
  position: absolute;
  top: 23px;
  bottom: 23px;
  left: 19px;
  width: 1px;
  background: linear-gradient(to bottom, #c9d9ee, #e4edf8);
}
.step-item {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 15px 17px 15px 0;
}
.step-no {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 39px;
  height: 39px;
  flex: none;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  color: var(--brand);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 650;
  box-shadow: 0 3px 10px rgba(20, 47, 82, 0.04);
}
.step-body { min-width: 0; padding-top: 2px; }
.step-body h3 { font-size: 14.5px; font-weight: 680; letter-spacing: -0.01em; }
.step-body h3 span { color: var(--brand); }
.step-body p { max-width: 640px; margin-top: 4px; color: var(--muted); font-size: 11px; line-height: 1.7; }
.inline-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 7px;
  color: var(--brand);
  font-size: 10.5px;
  font-weight: 650;
}
.inline-link .icon { width: 13px; height: 13px; }
.inline-link:hover { text-decoration: underline; text-underline-offset: 2px; }

/* Forum form preview */
.forum-form-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: var(--shadow-md);
}
.forum-form-head {
  display: flex;
  align-items: center;
  gap: 11px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--line);
}
.forum-form-icon {
  display: grid;
  place-items: center;
  width: 37px;
  height: 37px;
  flex: none;
  border-radius: 10px;
  background: var(--brand-soft);
  color: var(--brand);
}
.forum-form-icon .icon { width: 18px; height: 18px; }
.forum-form-head > div { display: flex; flex-direction: column; min-width: 0; line-height: 1.3; }
.forum-form-head strong { color: var(--ink-2); font-size: 13px; font-weight: 680; }
.forum-form-head small { margin-top: 3px; color: var(--muted-2); font-size: 9.5px; }
.auto-badge {
  margin-left: auto;
  padding: 4px 8px;
  border: 1px solid #f3d5e2;
  border-radius: 999px;
  background: var(--pink-soft);
  color: #c34a76;
  font-size: 8.5px;
  font-weight: 650;
  white-space: nowrap;
}
.forum-field-list { padding: 3px 0 2px; }
.forum-field {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 18px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--line);
}
.forum-field:last-child { border-bottom: 0; }
.forum-field-label { color: var(--ink-2); font-size: 11px; font-weight: 600; }
.forum-field-label em { margin-left: 2px; color: #d74949; font-style: normal; }
.forum-field > div { display: flex; flex-direction: column; min-width: 0; }
.forum-field strong { color: #31475f; font-size: 11px; font-weight: 600; }
.forum-field small { margin-top: 3px; color: var(--muted-2); font-size: 9.5px; line-height: 1.6; }
.forum-form-note {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  margin-top: 14px;
  padding: 10px 12px;
  border: 1px solid #dce8f8;
  border-radius: 9px;
  background: #f5f9ff;
  color: #54708e;
  font-size: 9.5px;
  line-height: 1.65;
}
.forum-form-note .icon { width: 13px; height: 13px; margin-top: 1px; flex: none; color: var(--brand); }
.forum-form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 14px;
}
.forum-form-actions .btn { min-height: 42px; font-size: 12px; }
.forum-form-actions .btn-primary { flex: 1; min-width: 160px; }
.forum-form-actions .btn-secondary { flex: 0 1 auto; }

.privacy-note {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  margin-top: 12px;
  color: var(--muted-2);
  font-size: 9.5px;
  line-height: 1.6;
}
.privacy-note .icon { width: 12px; height: 12px; margin-top: 1px; color: var(--green); }
.login-note {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  margin-top: 10px;
  color: #54708e;
  font-size: 9.5px;
  line-height: 1.6;
}
.login-note .icon { width: 12px; height: 12px; margin-top: 1px; color: var(--brand); }
.login-note a { color: var(--brand); font-weight: 650; text-decoration: underline; text-underline-offset: 2px; }

/* FAQ */
.faq-list {
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item:last-child { border-bottom: 0; }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 17px;
  color: var(--ink-2);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { background: #fafcff; }
.faq-chevron { width: 15px; height: 15px; color: var(--muted-2); transition: transform 0.2s ease; }
.faq-item[open] .faq-chevron { transform: rotate(180deg); color: var(--brand); }
.faq-answer {
  padding: 0 17px 15px;
  color: var(--muted);
  font-size: 10.5px;
  line-height: 1.8;
}
.faq-answer a { color: var(--brand); text-decoration: underline; text-underline-offset: 2px; }

/* Sidebar */
.sidebar { position: sticky; top: 92px; display: grid; gap: 12px; }
.side-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background:
    radial-gradient(ellipse 220px 150px at 100% 0%, rgba(47, 111, 237, 0.07), transparent 70%),
    var(--surface);
  box-shadow: var(--shadow-md);
}
.side-kicker { color: var(--brand); font-family: var(--mono); font-size: 8.5px; letter-spacing: 0.14em; }
.side-card h3 { margin-top: 9px; font-size: 17px; font-weight: 700; letter-spacing: -0.02em; }
.side-card > p { margin-top: 7px; color: var(--muted); font-size: 10.5px; line-height: 1.7; }
.side-mail {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 14px;
  padding: 10px 11px;
  border: 1px solid #dce8f8;
  border-radius: 9px;
  background: #f5f9ff;
  color: #1d4d80;
  font-size: 11px;
  font-weight: 600;
  word-break: break-all;
}
.side-mail .icon { width: 14px; height: 14px; color: var(--brand); }
.side-meta {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 8px;
  color: var(--muted-2);
  font-size: 9px;
}
.side-meta .icon { width: 11px; height: 11px; }
.side-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 13px;
  border-top: 1px solid var(--line);
  color: var(--brand);
  font-size: 10.5px;
  font-weight: 650;
}
.side-link .icon { width: 14px; height: 14px; }
.side-tip {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  padding: 11px 13px;
  border: 1px solid #f2e2bf;
  border-radius: 11px;
  background: var(--amber-soft);
  color: #806222;
  font-size: 9.5px;
  line-height: 1.6;
}
.side-tip .icon { width: 13px; height: 13px; margin-top: 1px; flex: none; }
.side-netdisk {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px;
  border: 1px solid #d9e7f7;
  border-radius: 14px;
  background: #fff;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}
.side-netdisk:hover { border-color: #b7cbe3; box-shadow: var(--shadow-sm); }
.side-netdisk-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: none;
  border-radius: 10px;
  background: var(--brand-soft);
  color: var(--brand);
}
.side-netdisk-icon .icon { width: 17px; height: 17px; }
.side-netdisk > span:nth-child(2) { display: flex; flex-direction: column; min-width: 0; line-height: 1.25; }
.side-netdisk small { color: var(--muted-2); font-family: var(--mono); font-size: 7.5px; letter-spacing: 0.1em; }
.side-netdisk strong { margin-top: 3px; font-size: 11.5px; font-weight: 650; }
.side-netdisk > .icon { width: 15px; height: 15px; margin-left: auto; color: var(--muted-2); }

/* Footer */
.site-footer {
  margin-top: 10px;
  padding: 38px 0 25px;
  border-top: 1px solid var(--line);
  background: #fff;
}
.footer-inner {
  display: flex;
  align-items: center;
  gap: 24px;
}
.footer-brand { display: flex; align-items: center; gap: 10px; }
.footer-brand img { width: 30px; height: 30px; border-radius: 8px; }
.footer-brand div { display: flex; flex-direction: column; line-height: 1.2; }
.footer-brand strong { font-size: 13px; letter-spacing: 0.06em; }
.footer-brand span { margin-top: 3px; color: var(--muted-2); font-family: var(--mono); font-size: 7px; letter-spacing: 0.12em; }
.footer-inner > p { color: var(--muted-2); font-size: 10px; }
.footer-links { display: flex; gap: 18px; margin-left: auto; }
.footer-links a { color: var(--muted); font-size: 10px; }
.footer-links a:hover { color: var(--brand); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid #eef3f9;
  color: #9aa9ba;
  font-size: 9px;
}

/* Toast */

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1020px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr) minmax(340px, 0.85fr); gap: 38px; }
  .hero h1 { font-size: 50px; }
  .main-grid { grid-template-columns: minmax(0, 1fr) 285px; gap: 22px; }
  .check-grid { grid-template-columns: 1fr; }
  .check-card { min-height: 0; }
}

@media (max-width: 900px) {
  .site-nav { display: none; }
  .hero { padding: 128px 0 92px; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-copy { max-width: 640px; }
  .progress-card { max-width: 480px; }
  .quick-strip { grid-template-columns: repeat(2, 1fr); }
  .quick-strip > div { border-right: 0; }
  .quick-strip > div:nth-child(odd) { border-right: 1px solid var(--line); }
  .quick-strip > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .main-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; grid-template-columns: 1fr 1fr; }
  .side-tip { align-self: start; }
  .footer-inner { flex-wrap: wrap; }
  .footer-inner > p { display: none; }
  .footer-links { margin-left: 0; }
}

@media (max-width: 760px) {
  .shell { width: calc(100% - 36px); }
  .site-header { padding: 12px 0; }
  .brand img { width: 33px; height: 33px; }
  .brand-words strong { font-size: 15.5px; }
  .brand-words span { font-size: 7.2px; }
  .header-cta { margin-left: auto; padding: 6px 11px; font-size: 11px; }
  .hero { padding: 112px 0 82px; }
  .hero h1 { font-size: 43px; }
  .hero-lede { font-size: 14px; }
  .hero-actions .btn { flex: 1; min-width: 0; }
  .progress-card { padding: 19px; border-radius: 21px; }
  .progress-card h2 { font-size: 18px; }
  .quick-strip-wrap { margin-top: -28px; }
  .quick-strip > div { padding: 11px 12px; }
  .quick-strip strong { font-size: 11px; }
  .quick-strip small { font-size: 9px; }
  .main-grid { padding-top: 40px; }
  .section-block { margin-bottom: 38px; }
  .section-head { align-items: flex-start; flex-direction: column; gap: 5px; }
  .section-head h2 { font-size: 25px; }
  .section-head > p { padding-bottom: 0; white-space: normal; font-size: 11px; }
  .step-list::before { left: 17px; }
  .step-no { width: 35px; height: 35px; border-radius: 10px; }
  .step-item { gap: 12px; padding-right: 0; }
  .step-body p { font-size: 10.5px; }
  .forum-form-card { padding: 16px; border-radius: 17px; }
  .forum-form-actions .btn { flex: 1; min-width: 0; }
  .forum-form-actions .btn-secondary { flex: 0 1 auto; }
  .faq-item summary { padding: 14px 15px; font-size: 11.5px; }
  .faq-answer { padding: 0 15px 14px; font-size: 10px; }
  .sidebar { grid-template-columns: 1fr; }
  .site-footer { padding-top: 30px; }
  .footer-inner { gap: 16px; }
  .footer-links { flex-wrap: wrap; gap: 12px 16px; }
  .footer-bottom { align-items: flex-start; flex-direction: column; gap: 6px; }
}

@media (max-width: 520px) {
  .shell { width: calc(100% - 30px); }
  .brand-words span { display: none; }
  .brand-words strong { font-size: 15px; }
  .hero { padding-top: 104px; padding-bottom: 76px; }
  .eyebrow { font-size: 8.5px; letter-spacing: 0.12em; }
  .hero h1 { margin: 17px 0 15px; font-size: 36px; letter-spacing: -0.04em; }
  .hero-lede { font-size: 13px; line-height: 1.75; }
  .hero-actions { gap: 8px; margin-top: 24px; }
  .hero-actions .btn { min-height: 44px; padding: 10px 12px; font-size: 12px; }
  .hero-trust { gap: 8px 13px; margin-top: 20px; font-size: 10px; }
  .progress-card { padding: 17px; border-radius: 19px; }
  .progress-card h2 { margin: 11px 0 14px; font-size: 17px; }
  .progress-top { font-size: 7.5px; }
  .progress-list li { min-height: 47px; }
  .quick-strip { border-radius: 15px; padding: 6px; }
  .quick-strip > div { gap: 8px; padding: 10px 9px; }
  .quick-icon { width: 30px; height: 30px; border-radius: 8px; }
  .quick-icon .icon { width: 15px; height: 15px; }
  .quick-strip strong { font-size: 10.5px; }
  .quick-strip small { font-size: 8.5px; }
  .section-head h2 { font-size: 23px; }
  .check-card { padding: 14px; }
  .check-card p { font-size: 9.5px; }
  .requirement-banner { gap: 9px; padding: 11px 12px; }
  .requirement-value { min-width: 50px; font-size: 15px; }
  .forum-form-card { padding: 14px; }
  .forum-field { grid-template-columns: 1fr; gap: 4px; }
  .forum-field-label { font-size: 10.5px; }
  .forum-form-head strong { font-size: 12px; }
  .forum-form-head small { font-size: 9px; }
  .forum-form-actions .btn { font-size: 11.5px; min-height: 42px; }
  .side-card { padding: 17px; }
  .side-netdisk { padding: 12px; }
  .footer-brand strong { font-size: 12px; }
}