/* Recoder landing — 明亮网格纸 · Z 形 · 灵动动画 */
:root {
  --bg: #FAF9F6;
  --card: #FFFFFF;
  --ink: #1B1B1F;
  --ink-2: #5A5A63;
  --ink-3: #9A9AA3;
  --line: rgba(0, 0, 0, 0.10);
  --dash: rgba(0, 0, 0, 0.24);
  --paper-line: rgba(0, 0, 0, 0.05);
  --paper-line-strong: rgba(0, 0, 0, 0.11);
  --accent: #FF4F00;
  --accent-2: #FF9A3D;
  --accent-deep: #E04400;
  --accent-soft: #FFF1E9;
  --glow: rgba(255, 79, 0, 0.14);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

::selection {
  background: var(--accent);
  color: #fff;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--paper-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--paper-line) 1px, transparent 1px),
    linear-gradient(to right, var(--paper-line-strong) 1px, transparent 1px),
    linear-gradient(to bottom, var(--paper-line-strong) 1px, transparent 1px);
  background-size: 24px 24px, 24px 24px, 120px 120px, 120px 120px;
  pointer-events: none;
  z-index: 0;
}

.container {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 28px;
}

.site-header {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(250, 249, 246, 0.86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 10;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand-logo {
  width: 30px;
  height: 30px;
  object-fit: contain;
  display: inline-block;
  flex-shrink: 0;
}

.brand-name {
  background: linear-gradient(110deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.header-dl {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  border: 1px solid var(--accent);
  padding: 8px 16px;
  border-radius: 8px;
  transition: background 0.2s, color 0.2s, transform 0.15s;
}

.header-dl:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-1px);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 88px 0 80px;
  border-bottom: 1px solid var(--line);
}

.hero-glow {
  position: absolute;
  top: -200px;
  right: -120px;
  width: 680px;
  height: 500px;
  background: radial-gradient(closest-side, var(--glow), transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 48px;
}

.hero .hero-copy {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero .kicker {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.04em;
  padding: 6px 13px;
  border: 1px solid rgba(255, 79, 0, 0.35);
  border-radius: 999px;
  margin-bottom: 24px;
  background: var(--accent-soft);
}

.hero h1 {
  font-size: clamp(38px, 5.4vw, 62px);
  line-height: 1.07;
  letter-spacing: -0.035em;
  font-weight: 800;
  margin-bottom: 20px;
}

.hero h1 .grad {
  background: linear-gradient(110deg, var(--accent) 10%, var(--accent-2) 60%, #FFBE85 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: title-glow 3.6s ease-in-out infinite;
}

@keyframes title-glow {

  0%,
  100% {
    filter: drop-shadow(0 0 4px rgba(255, 79, 0, 0.10));
  }

  50% {
    filter: drop-shadow(0 0 18px rgba(255, 79, 0, 0.40));
  }
}

.hero .sub {
  font-size: 16px;
  color: var(--ink-2);
  max-width: 48ch;
  margin-bottom: 30px;
}

.dl-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.btn-dl {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  padding: 13px 24px;
  border-radius: 10px;
  border: 1px solid var(--accent);
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 4px 18px rgba(255, 79, 0, 0.22);
}

.btn-dl svg {
  flex-shrink: 0;
}

.btn-dl:hover {
  background: var(--accent-deep);
  border-color: var(--accent-deep);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(255, 79, 0, 0.32);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  padding: 13px 24px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--card);
  transition: border-color 0.2s, transform 0.15s, box-shadow 0.2s;
}

.btn-ghost:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(255, 79, 0, 0.12);
}

.hero-meta {
  margin-top: 24px;
  font-size: 12.5px;
  color: var(--ink-3);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-meta span+span::before {
  content: "·";
  margin: 0 8px;
  color: var(--line);
}

.img-slot {
  position: relative;
  border: 1.5px dashed var(--dash);
  border-radius: 16px;
  min-height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-3);
  font-size: 12px;
  letter-spacing: 0.08em;
  background: rgba(255, 255, 255, 0.55);
  overflow: hidden;
}

.hero .img-slot {
  width: 100%;
  min-height: 640px;
}

.zblock .img-slot {
  width: 100%;
  aspect-ratio: 1612 / 987;
  min-height: 0;
}

.slot-float {
  position: absolute;
  background: var(--accent);
  animation: floaty 5.5s ease-in-out infinite;
}

.slot-float.f1 {
  width: 84px;
  height: 56px;
  top: 20%;
  left: 16%;
  border-radius: 12px;
  opacity: 0.90;
}

.slot-float.f2 {
  width: 46px;
  height: 46px;
  top: 56%;
  left: 60%;
  border-radius: 50%;
  background: var(--accent-2);
  opacity: 0.85;
  animation-delay: 1.2s;
}

.slot-float.f3 {
  width: 26px;
  height: 26px;
  top: 26%;
  right: 18%;
  border-radius: 7px;
  opacity: 0.55;
  animation-delay: 2.3s;
}

@keyframes floaty {

  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }

  50% {
    transform: translateY(-14px) rotate(5deg);
  }
}

.slot-label {
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.8);
  padding: 4px 10px;
  border-radius: 6px;
}

.zblocks {
  padding: 88px 0 40px;
  border-bottom: 1px solid var(--line);
}

.zblock {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 56px;
  align-items: center;
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}

.zblock:last-child {
  border-bottom: none;
}

.zblock--flip .img-slot {
  order: 2;
}

.zblock--flip .z-copy {
  order: 1;
}

.zblock--flip {
  grid-template-columns: 0.8fr 1.2fr;
}

.z-copy .z-num {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 14px;
}

.z-copy h2 {
  font-size: clamp(24px, 2.8vw, 32px);
  letter-spacing: -0.02em;
  font-weight: 750;
  margin-bottom: 14px;
}

.z-copy .z-lead {
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.75;
  margin-bottom: 20px;
  max-width: 46ch;
}

.z-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.z-points li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-size: 13.5px;
  color: var(--ink-2);
}

.z-points li::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
  align-self: center;
}

.z-points li strong {
  color: var(--ink);
  font-weight: 600;
}

.tele {
  padding: 88px 0 80px;
  border-bottom: 1px solid var(--line);
}

.tele-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 20px;
  align-items: start;
}

.tele-tabs {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.tele-tab {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  text-align: left;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--ink-2);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 14px 16px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s, transform 0.15s;
}

.tele-tab svg {
  flex-shrink: 0;
  opacity: 0.75;
}

.tele-tab:hover {
  border-color: rgba(255, 79, 0, 0.45);
  color: var(--ink);
  transform: translateX(3px);
}

.tele-tab.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.tele-tab.active svg {
  opacity: 1;
}

.tele-panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  padding: 30px 32px;
  min-height: 320px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  animation: panel-in 0.3s ease;
}

@keyframes panel-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tele-panel h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.tele-panel p {
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.75;
  max-width: 52ch;
}

.tp-demo {
  margin-top: 24px;
  border: 1px solid var(--line);
  background: var(--bg);
  border-radius: 10px;
  padding: 18px;
  font-size: 13px;
  line-height: 2;
}

.tp-demo .tp-line {
  padding: 3px 8px;
  border-radius: 5px;
}

.tp-demo .tp-line.hot {
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}

.tp-demo .tp-dim {
  opacity: 0.35;
}

.tp-demo .tp-head {
  font-weight: 700;
  color: var(--ink);
}

.tp-demo .tp-code {
  font-family: "Consolas", monospace;
  background: rgba(255, 79, 0, 0.10);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 12.5px;
  color: var(--accent);
}

.tp-demo .tp-row {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}

.tp-demo .tp-big {
  font-size: 26px;
  font-weight: 700;
}

.tp-demo .tp-small {
  font-size: 12.5px;
  opacity: 0.55;
}

.tp-demo .tp-bar {
  flex: 1;
  min-width: 120px;
  height: 8px;
  background: rgba(0, 0, 0, 0.08);
  border-radius: 99px;
  position: relative;
}

.tp-demo .tp-bar::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 60%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 99px;
}

.download {
  padding: 88px 0;
}

.download-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 36px;
}

.download-head h2 {
  font-size: clamp(24px, 3vw, 32px);
  letter-spacing: -0.02em;
  font-weight: 750;
}

.download-head .idx {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink-3);
}

.dl-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.dl-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  padding: 30px 30px 34px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}

.dl-card:hover {
  border-color: rgba(255, 79, 0, 0.45);
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(255, 79, 0, 0.14);
}

.dl-card .fname {
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  word-break: break-all;
}

.dl-card .fdesc {
  font-size: 13px;
  color: var(--ink-2);
  margin-bottom: 22px;
  line-height: 1.65;
}

.dl-card .btn-dl,
.dl-card .btn-ghost {
  width: 100%;
  justify-content: center;
}

.dl-note {
  margin-top: 26px;
  font-size: 12.5px;
  color: var(--ink-3);
  max-width: 72ch;
  line-height: 1.85;
}

.dl-note strong {
  color: var(--ink-2);
  font-weight: 600;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 32px 0;
  font-size: 12px;
  color: var(--ink-3);
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.site-footer .foot-brand {
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.site-footer .brand-logo {
  width: 20px;
  height: 20px;
}

.site-footer .foot-brand .brand-name {
  background: linear-gradient(110deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 920px) {
  .hero .container {
    gap: 36px;
  }

  .zblock {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .zblock--flip .img-slot {
    order: 0;
  }

  .zblock--flip .z-copy {
    order: 1;
  }

  .zblock--flip {
    grid-template-columns: 0.8fr 1.2fr;
  }

  .tele-layout {
    grid-template-columns: 1fr;
  }

  .dl-cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .container {
    padding: 0 18px;
  }

  .hero {
    padding: 64px 0 56px;
  }

  .zblocks {
    padding: 56px 0 24px;
  }

  .download-head {
    flex-direction: column;
    gap: 6px;
  }
}

/* 卡片随鼠标轻微倾斜 */
.img-slot {
  transition: transform 0.18s ease-out, border-color 0.25s;
}

.img-slot:hover .slot-float {
  animation-duration: 2.2s;
}

/* ---------- 顶部外链 ---------- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.header-link:hover {
  color: var(--accent);
  border-color: var(--line);
  background: var(--accent-soft);
}

/* ---------- 常见问题（手风琴） ---------- */
.faq {
  padding: 88px 0 96px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 820px;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.faq-item[open] {
  border-color: rgba(255, 79, 0, 0.45);
  box-shadow: 0 10px 28px rgba(255, 79, 0, 0.08);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  user-select: none;
  padding: 16px 20px;
  font-size: 14.5px;
  font-weight: 650;
  color: var(--ink);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 19px;
  font-weight: 500;
  line-height: 1;
  color: var(--accent);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item .faq-a {
  padding: 0 20px 18px;
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.8;
}

.faq-item .faq-a strong {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- 背景动态（光点漂浮 + 光斑漂移 + 光晕呼吸） ---------- */
.bg-orbs {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.bg-orb {
  position: absolute;
  border-radius: 50%;
  animation: orb-float 18s ease-in-out infinite;
  will-change: transform, opacity;
}

.bg-orb.o1 {
  width: 10px;
  height: 10px;
  background: var(--accent);
  top: 18%;
  left: 12%;
  animation-delay: 0s;
}

.bg-orb.o2 {
  width: 6px;
  height: 6px;
  background: var(--accent-2);
  top: 34%;
  left: 82%;
  animation-delay: 2.4s;
}

.bg-orb.o3 {
  width: 14px;
  height: 14px;
  background: rgba(255, 79, 0, 0.35);
  top: 66%;
  left: 22%;
  animation-delay: 4.8s;
}

.bg-orb.o4 {
  width: 8px;
  height: 8px;
  background: rgba(0, 0, 0, 0.16);
  top: 78%;
  left: 74%;
  animation-delay: 7.2s;
}

.bg-orb.o5 {
  width: 5px;
  height: 5px;
  background: var(--accent-2);
  top: 52%;
  left: 48%;
  animation-delay: 9.6s;
}

.bg-orb.o6 {
  width: 11px;
  height: 11px;
  background: rgba(255, 79, 0, 0.30);
  top: 12%;
  left: 60%;
  animation-delay: 12s;
}

@keyframes orb-float {

  0%,
  100% {
    transform: translate(0, 0);
    opacity: 0.30;
  }

  25% {
    transform: translate(14px, -18px);
    opacity: 0.70;
  }

  50% {
    transform: translate(-10px, 12px);
    opacity: 0.45;
  }

  75% {
    transform: translate(8px, 16px);
    opacity: 0.60;
  }
}

body::after {
  content: "";
  position: fixed;
  inset: -80px;
  background-image:
    radial-gradient(circle at 18% 28%, rgba(255, 79, 0, 0.10), transparent 34%),
    radial-gradient(circle at 82% 18%, rgba(255, 159, 61, 0.09), transparent 30%),
    radial-gradient(circle at 68% 78%, rgba(255, 79, 0, 0.07), transparent 36%),
    radial-gradient(circle at 28% 82%, rgba(255, 159, 61, 0.08), transparent 26%);
  pointer-events: none;
  z-index: 0;
  animation: bg-glow-drift 46s ease-in-out infinite alternate;
}

@keyframes bg-glow-drift {
  from {
    transform: translate3d(-24px, -16px, 0) scale(1);
  }

  to {
    transform: translate3d(24px, 18px, 0) scale(1.06);
  }
}

.hero-glow {
  animation: hero-breathe 8s ease-in-out infinite;
}

@keyframes hero-breathe {

  0%,
  100% {
    opacity: 0.72;
    transform: scale(1);
  }

  50% {
    opacity: 1;
    transform: scale(1.07);
  }
}

@media (prefers-reduced-motion: reduce) {

  .bg-orb,
  body::after,
  .hero-glow {
    animation: none;
  }
}

/* ---------- 单一下载卡片 ---------- */
.dl-card--single {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.dl-card--single .btn-dl {
  width: auto;
  flex-shrink: 0;
}

@media (max-width: 640px) {
  .dl-card--single {
    flex-direction: column;
    align-items: stretch;
  }
}

/* ---------- 图片替换：把 .img-slot 换成 <img class="img-show"> ---------- */
.img-show {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 340px;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid var(--line);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.10);
  transition: transform 0.18s ease-out, box-shadow 0.25s;
}

.hero .img-show {
  min-height: 640px;
}