/* ============================================================
   江南工具箱 · 落地页样式
   命名约定：所有类名以 jiangnantool_ 开头，避免与外部样式冲突。
   设计基调：深色墨感背景 + 青绿 / 天蓝 / 紫罗兰渐变，呼应「江南」与玩机工具。
   ============================================================ */

:root {
  /* 色彩 */
  --jn-bg: #080a0f;
  --jn-bg-soft: #0b0e15;
  --jn-surface: #11141d;
  --jn-surface-raised: #171b27;
  --jn-text: #f4f7fc;
  --jn-muted: #a3adc1;
  --jn-dim: #768196;
  --jn-cyan: #67e8f9;
  --jn-jade: #5eead4;
  --jn-blue: #7da2ff;
  --jn-violet: #b79cff;
  --jn-line: rgba(255, 255, 255, 0.085);
  --jn-line-strong: rgba(255, 255, 255, 0.16);

  /* 渐变 */
  --jn-grad: linear-gradient(115deg, #5eead4 0%, #38bdf8 34%, #6366f1 68%, #a855f7 100%);
  --jn-grad-btn: linear-gradient(118deg, #0f9e9a 0%, #2563eb 52%, #7c3aed 100%);
  --jn-grad-text: linear-gradient(108deg, #a7f3e8 0%, #7dd3fc 34%, #a5b4fc 64%, #d8b4fe 100%);

  /* 布局 */
  --jn-header: 76px;
  --jn-container: min(1160px, calc(100% - 96px));
  --jn-radius: 18px;
  --jn-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--jn-header) + 24px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
}

h1,
h2,
h3,
p,
dl,
dd,
figure {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

button {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  display: block;
}

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

::selection {
  background: rgba(94, 234, 212, 0.26);
  color: #ffffff;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--jn-cyan);
  outline-offset: 4px;
}

/* ---------- 页面底层氛围 ---------- */
.jiangnantool_page {
  min-height: 100vh;
  background: var(--jn-bg);
  color: var(--jn-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 双色氛围光，固定铺底，不参与滚动 */
.jiangnantool_page::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 620px at 50% -10%, rgba(56, 189, 248, 0.13), transparent 62%),
    radial-gradient(720px 540px at 88% 24%, rgba(168, 85, 247, 0.075), transparent 66%),
    radial-gradient(620px 480px at 6% 62%, rgba(94, 234, 212, 0.05), transparent 68%);
}

/* 极轻的颗粒感，让大面积深色更耐看 */
.jiangnantool_page::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.022;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

.jiangnantool_header,
.jiangnantool_main,
.jiangnantool_footer,
.jiangnantool_skip {
  position: relative;
  z-index: 1;
}

/* ---------- 无障碍跳转链接 ---------- */
.jiangnantool_skip {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: 10px;
  background: #ffffff;
  color: #0b0e15;
  font-size: 14px;
  font-weight: 600;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

.jiangnantool_skip:focus {
  transform: translateY(0);
}

/* ---------- 通用容器 ---------- */
.jiangnantool_container {
  width: var(--jn-container);
  margin-inline: auto;
}

/* ============================================================
   页头
   ============================================================ */
.jiangnantool_header {
  position: sticky;
  top: 0;
  z-index: 80;
  height: var(--jn-header);
  border-bottom: 1px solid transparent;
  background: rgba(8, 10, 15, 0.45);
  transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

@supports ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .jiangnantool_header {
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
  }
}

.jiangnantool_header.jiangnantool_is-scrolled {
  border-bottom-color: var(--jn-line);
  background: rgba(8, 10, 15, 0.84);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.28);
}

.jiangnantool_header-inner {
  display: flex;
  align-items: center;
  gap: 26px;
  height: 100%;
}

.jiangnantool_brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.jiangnantool_brand-logo {
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.03), 0 6px 16px rgba(0, 0, 0, 0.35);
}

.jiangnantool_brand-text {
  letter-spacing: 0.02em;
}

.jiangnantool_brand-badge {
  padding: 3px 6px;
  border: 1px solid rgba(94, 234, 212, 0.24);
  border-radius: 5px;
  background: rgba(94, 234, 212, 0.07);
  color: #9ff5e8;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 9px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.13em;
}

/* 桌面导航 */
.jiangnantool_nav {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-left: auto;
}

.jiangnantool_nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--jn-muted);
  font-size: 14px;
  transition: color 0.2s ease;
}

.jiangnantool_nav-link::after {
  content: "";
  position: absolute;
  bottom: 12px;
  left: 50%;
  width: 0;
  height: 1px;
  border-radius: 1px;
  background: var(--jn-grad);
  transform: translateX(-50%);
  transition: width 0.28s var(--jn-ease);
}

.jiangnantool_nav-link:hover {
  color: var(--jn-text);
}

.jiangnantool_nav-link.jiangnantool_is-active {
  color: var(--jn-text);
}

.jiangnantool_nav-link.jiangnantool_is-active::after {
  width: 100%;
}

.jiangnantool_header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.jiangnantool_header-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 18px;
  border: 1px solid var(--jn-line-strong);
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.025));
  font-size: 13.5px;
  font-weight: 600;
  white-space: nowrap;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease,
    color 0.2s ease;
}

.jiangnantool_header-download:hover {
  border-color: rgba(125, 211, 252, 0.5);
  background: linear-gradient(180deg, rgba(125, 211, 252, 0.12), rgba(125, 211, 252, 0.04));
  box-shadow: 0 0 26px rgba(56, 189, 248, 0.14);
}

/* 汉堡按钮 */
.jiangnantool_menu-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border: 1px solid var(--jn-line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
}

.jiangnantool_menu-bar {
  display: block;
  width: 17px;
  height: 1.5px;
  border-radius: 2px;
  background: #dfe7f5;
  transition: transform 0.28s var(--jn-ease), opacity 0.2s ease;
}

.jiangnantool_header.jiangnantool_nav-open .jiangnantool_menu-toggle {
  border-color: rgba(125, 211, 252, 0.4);
  background: rgba(125, 211, 252, 0.08);
}

.jiangnantool_header.jiangnantool_nav-open .jiangnantool_menu-bar:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.jiangnantool_header.jiangnantool_nav-open .jiangnantool_menu-bar:nth-child(2) {
  opacity: 0;
}

.jiangnantool_header.jiangnantool_nav-open .jiangnantool_menu-bar:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* 移动端菜单 */
.jiangnantool_mobile-menu {
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  display: none;
  border-bottom: 1px solid var(--jn-line);
  background: radial-gradient(520px 240px at 50% 0%, rgba(56, 189, 248, 0.08), transparent 72%),
    #090c12;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity 0.25s ease, transform 0.3s var(--jn-ease),
    visibility 0.25s ease;
}

@supports ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .jiangnantool_mobile-menu {
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
  }
}

.jiangnantool_header.jiangnantool_nav-open .jiangnantool_mobile-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

/* 移动端菜单展开时锁定页面滚动，避免菜单与背景内容同时移动 */
.jiangnantool_page.jiangnantool_menu-open {
  overflow: hidden;
}

.jiangnantool_mobile-nav {
  width: var(--jn-container);
  max-height: calc(100vh - var(--jn-header) - 12px);
  margin-inline: auto;
  padding: 8px 0 24px;
  overflow-y: auto;
}

.jiangnantool_mobile-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 50px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  color: #dbe3f2;
  font-size: 15px;
}

.jiangnantool_mobile-link span:last-child {
  color: var(--jn-dim);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
}

.jiangnantool_mobile-download {
  width: 100%;
  margin-top: 18px;
}

/* ============================================================
   首屏 Hero
   ============================================================ */
.jiangnantool_hero {
  position: relative;
  isolation: isolate;
  padding: 92px 0 90px;
  overflow: hidden;
  text-align: center;
}

/* 细网格 + 向四周渐隐，营造“控制台”质感 */
.jiangnantool_hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.032) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 70% 64% at 50% 36%, #000 10%, transparent 76%);
  mask-image: radial-gradient(ellipse 70% 64% at 50% 36%, #000 10%, transparent 76%);
  opacity: 0.65;
  pointer-events: none;
}

.jiangnantool_hero-glow {
  position: absolute;
  top: -260px;
  left: 50%;
  z-index: -1;
  width: 980px;
  height: 720px;
  border-radius: 50%;
  background: radial-gradient(
    ellipse at center,
    rgba(56, 189, 248, 0.16) 0%,
    rgba(99, 102, 241, 0.09) 38%,
    transparent 68%
  );
  filter: blur(12px);
  transform: translateX(-50%);
  pointer-events: none;
}

.jiangnantool_hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.jiangnantool_hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 30px;
  padding: 7px 14px;
  border: 1px solid var(--jn-line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.025);
  color: #b8c5db;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 10.5px;
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

@supports ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .jiangnantool_hero-eyebrow {
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
  }
}

.jiangnantool_pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--jn-jade);
  box-shadow: 0 0 0 0 rgba(94, 234, 212, 0.5);
  animation: jiangnantool_pulse 2.6s ease-out infinite;
}

.jiangnantool_hero-logo-wrap {
  position: relative;
  display: grid;
  place-items: center;
  width: 112px;
  height: 112px;
  margin-bottom: 30px;
}

.jiangnantool_hero-logo-glow {
  position: absolute;
  inset: -20px;
  z-index: 0;
  border-radius: 50%;
  background: conic-gradient(
    from 160deg,
    rgba(94, 234, 212, 0.55),
    rgba(56, 189, 248, 0.16),
    rgba(168, 85, 247, 0.55),
    rgba(94, 234, 212, 0.55)
  );
  filter: blur(22px);
  opacity: 0.5;
  animation: jiangnantool_glow 8s ease-in-out infinite alternate;
  pointer-events: none;
}

.jiangnantool_hero-logo {
  position: relative;
  z-index: 1;
  width: 112px;
  height: 112px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 26px;
  object-fit: cover;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.52), 0 0 44px rgba(56, 189, 248, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.jiangnantool_hero-logo-wrap::after {
  content: "";
  position: absolute;
  inset: -7px;
  z-index: 0;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 31px;
  pointer-events: none;
}

.jiangnantool_hero-logo-badge {
  position: absolute;
  right: -22px;
  bottom: -7px;
  z-index: 2;
  padding: 4px 8px;
  border: 1px solid var(--jn-line-strong);
  border-radius: 6px;
  background: #0c1018;
  color: #d5e6ff;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 9.5px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.06em;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
}

.jiangnantool_hero-title {
  color: var(--jn-text);
  font-size: clamp(52px, 7.2vw, 88px);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.045em;
}

@supports ((background-clip: text) or (-webkit-background-clip: text)) {
  .jiangnantool_hero-title {
    width: fit-content;
    margin-inline: auto;
    background: var(--jn-grad-text);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

.jiangnantool_hero-subtitle {
  margin-top: 16px;
  color: #e0e7f5;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.005em;
}

.jiangnantool_hero-description {
  max-width: 660px;
  margin: 14px auto 0;
  color: var(--jn-muted);
  font-size: 16px;
  line-height: 1.85;
  text-wrap: pretty;
}

.jiangnantool_hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 34px;
}

/* 通用按钮 */
.jiangnantool_btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 52px;
  padding: 0 26px;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: transform 0.25s var(--jn-ease), box-shadow 0.25s ease,
    border-color 0.25s ease, background 0.25s ease;
}

.jiangnantool_btn .jiangnantool_icon {
  transition: transform 0.25s var(--jn-ease);
}

.jiangnantool_btn:hover .jiangnantool_icon {
  transform: translateY(1px);
}

.jiangnantool_btn--primary {
  border-color: rgba(255, 255, 255, 0.16);
  background: var(--jn-grad-btn);
  color: #ffffff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22),
    0 14px 34px rgba(59, 91, 253, 0.26), 0 3px 10px rgba(0, 0, 0, 0.35);
}

.jiangnantool_btn--primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    112deg,
    transparent 24%,
    rgba(255, 255, 255, 0.22) 48%,
    transparent 72%
  );
  transform: translateX(-130%);
  transition: transform 0.65s var(--jn-ease);
  pointer-events: none;
}

.jiangnantool_btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.26),
    0 20px 44px rgba(59, 91, 253, 0.34), 0 0 26px rgba(94, 234, 212, 0.12);
}

.jiangnantool_btn--primary:hover::before {
  transform: translateX(130%);
}

.jiangnantool_btn--ghost {
  border-color: var(--jn-line);
  background: rgba(255, 255, 255, 0.035);
  color: #e7edf9;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.jiangnantool_btn--ghost:hover {
  border-color: rgba(125, 211, 252, 0.4);
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-2px);
}

.jiangnantool_btn:active {
  transform: translateY(0) scale(0.995);
}

.jiangnantool_hero-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  margin-top: 18px;
  color: var(--jn-dim);
  font-size: 12.5px;
  line-height: 1.6;
}

.jiangnantool_hero-note .jiangnantool_icon {
  flex: none;
  opacity: 0.85;
}

.jiangnantool_hero-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  max-width: 720px;
  margin-top: 30px;
}

.jiangnantool_hero-tags li {
  padding: 6px 12px;
  border: 1px solid var(--jn-line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.02);
  color: #9ca9bf;
  font-size: 12px;
  line-height: 1.5;
}

/* ============================================================
   通用区块
   ============================================================ */
.jiangnantool_section {
  position: relative;
  padding: 108px 0;
}

.jiangnantool_section--surface {
  border-top: 1px solid var(--jn-line);
  border-bottom: 1px solid var(--jn-line);
  background: linear-gradient(180deg, rgba(18, 21, 32, 0.72), rgba(11, 14, 21, 0.72));
}

.jiangnantool_section-head {
  max-width: 760px;
  margin-bottom: 46px;
}

.jiangnantool_section-head--split {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  max-width: none;
}

.jiangnantool_section-head--split > div {
  max-width: 760px;
}

.jiangnantool_kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 15px;
  color: var(--jn-jade);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 10.5px;
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.jiangnantool_kicker::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: 0.65;
}

.jiangnantool_kicker--center {
  justify-content: center;
  color: #9ee8e4;
}

.jiangnantool_section-title {
  font-size: clamp(32px, 3.5vw, 46px);
  font-weight: 650;
  line-height: 1.22;
  letter-spacing: -0.035em;
}

.jiangnantool_section-desc {
  max-width: 640px;
  margin-top: 16px;
  color: var(--jn-muted);
  font-size: 16px;
  line-height: 1.8;
  text-wrap: pretty;
}

.jiangnantool_section-link {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 8px;
  padding-bottom: 7px;
  border-bottom: 1px solid var(--jn-line);
  color: #c7d4e8;
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.jiangnantool_section-link .jiangnantool_icon {
  transition: transform 0.25s var(--jn-ease);
}

.jiangnantool_section-link:hover {
  border-color: rgba(125, 211, 252, 0.5);
  color: #ffffff;
}

.jiangnantool_section-link:hover .jiangnantool_icon {
  transform: translateX(3px);
}

/* ============================================================
   核心模块
   ============================================================ */
.jiangnantool_modules-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.jiangnantool_module-card {
  --jn-accent: #5eead4;
  --jn-accent-soft: rgba(94, 234, 212, 0.09);
  --jn-accent-line: rgba(94, 234, 212, 0.2);

  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 322px;
  padding: 22px;
  overflow: hidden;
  border: 1px solid var(--jn-line);
  border-radius: var(--jn-radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.008) 46%),
    var(--jn-surface);
  isolation: isolate;
  transition: transform 0.35s var(--jn-ease), border-color 0.3s ease,
    box-shadow 0.35s ease;
}

.jiangnantool_module-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  z-index: -1;
  height: 180px;
  background: radial-gradient(150px 130px at 20% 0%, var(--jn-accent-soft), transparent 72%);
  opacity: 0.9;
  pointer-events: none;
}

.jiangnantool_module-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 18%;
  left: 18%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--jn-accent-line), transparent);
  opacity: 0.8;
  pointer-events: none;
}

.jiangnantool_module-card:nth-child(2) {
  --jn-accent: #7dd3fc;
  --jn-accent-soft: rgba(125, 211, 252, 0.09);
  --jn-accent-line: rgba(125, 211, 252, 0.22);
}

.jiangnantool_module-card:nth-child(3) {
  --jn-accent: #a5b4fc;
  --jn-accent-soft: rgba(165, 180, 252, 0.1);
  --jn-accent-line: rgba(165, 180, 252, 0.22);
}

.jiangnantool_module-card:nth-child(4) {
  --jn-accent: #d8b4fe;
  --jn-accent-soft: rgba(216, 180, 254, 0.09);
  --jn-accent-line: rgba(216, 180, 254, 0.22);
}

.jiangnantool_module-card:hover {
  border-color: rgba(255, 255, 255, 0.19);
  box-shadow: 0 24px 54px rgba(0, 0, 0, 0.34);
  transform: translateY(-5px);
}

.jiangnantool_module-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 34px;
}

.jiangnantool_module-icon {
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  border: 1px solid var(--jn-accent-line);
  border-radius: 14px;
  background: var(--jn-accent-soft);
  color: var(--jn-accent);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 10px 24px rgba(0, 0, 0, 0.24);
}

.jiangnantool_module-icon svg {
  width: 23px;
  height: 23px;
}

.jiangnantool_module-index {
  color: var(--jn-dim);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
}

.jiangnantool_module-label {
  display: block;
  margin-bottom: 8px;
  color: var(--jn-accent);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 9.5px;
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.85;
}

.jiangnantool_module-title {
  font-size: 21px;
  font-weight: 650;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.jiangnantool_module-text {
  margin-top: 10px;
  color: var(--jn-muted);
  font-size: 14px;
  line-height: 1.78;
  text-wrap: pretty;
}

.jiangnantool_module-meta {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--jn-line);
  color: var(--jn-dim);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 10.5px;
  line-height: 1.6;
  letter-spacing: 0.04em;
}

/* ============================================================
   界面预览：5 张真机截图，每张仅出现一次
   ============================================================ */
.jiangnantool_preview {
  overflow: hidden;
}

.jiangnantool_preview-hint {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 8px;
  padding-bottom: 6px;
  color: var(--jn-dim);
  font-size: 12px;
  white-space: nowrap;
}

.jiangnantool_preview-hint .jiangnantool_icon {
  opacity: 0.8;
}

.jiangnantool_gallery {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
  padding: 4px 0 8px;
  outline: none;
}

.jiangnantool_gallery:focus-visible {
  border-radius: 22px;
  outline: 2px solid var(--jn-cyan);
  outline-offset: 6px;
}

.jiangnantool_shot {
  min-width: 0;
  padding: 10px;
  border: 1px solid var(--jn-line);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.01)),
    var(--jn-surface);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 16px 36px rgba(0, 0, 0, 0.2);
  transition: transform 0.35s var(--jn-ease), border-color 0.3s ease,
    box-shadow 0.35s ease;
}

.jiangnantool_shot:hover {
  border-color: rgba(125, 211, 252, 0.36);
  box-shadow: 0 28px 60px rgba(0, 0, 0, 0.42), 0 0 0 1px rgba(125, 211, 252, 0.08);
  transform: translateY(-6px);
}

.jiangnantool_shot-frame {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  background: #0a0d13;
}

.jiangnantool_shot-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top center;
}

.jiangnantool_shot-index {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 2;
  padding: 3px 7px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 6px;
  background: rgba(5, 8, 12, 0.72);
  color: #e2ecfa;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 9.5px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.08em;
}

@supports ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .jiangnantool_shot-index {
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
  }
}

.jiangnantool_shot-caption {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 13px 6px 5px;
}

.jiangnantool_shot-title {
  color: #e8eef9;
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.5;
}

.jiangnantool_shot-desc {
  color: var(--jn-dim);
  font-size: 11.5px;
  line-height: 1.55;
  text-wrap: pretty;
}

.jiangnantool_preview-note {
  margin-top: 18px;
  color: var(--jn-dim);
  font-size: 11.5px;
  line-height: 1.7;
  text-align: center;
}

/* 窄屏改为单行横向滚动，保留每张截图的展示尺寸 */
@media (max-width: 1100px) {
  .jiangnantool_gallery {
    display: flex;
    gap: 14px;
    padding-bottom: 18px;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.18) transparent;
    -webkit-overflow-scrolling: touch;
  }

  .jiangnantool_shot {
    flex: 0 0 250px;
    scroll-snap-align: start;
  }

  .jiangnantool_gallery::-webkit-scrollbar {
    height: 6px;
  }

  .jiangnantool_gallery::-webkit-scrollbar-track {
    background: transparent;
  }

  .jiangnantool_gallery::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.16);
  }
}

/* ============================================================
   能力矩阵
   ============================================================ */
.jiangnantool_feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.jiangnantool_feature-card {
  position: relative;
  padding: 30px;
  overflow: hidden;
  border: 1px solid var(--jn-line);
  border-radius: var(--jn-radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.032), rgba(255, 255, 255, 0));
  isolation: isolate;
  transition: transform 0.35s var(--jn-ease), border-color 0.3s ease,
    box-shadow 0.35s ease;
}

.jiangnantool_feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(
    120deg,
    rgba(94, 234, 212, 0.075),
    transparent 42%,
    rgba(168, 85, 247, 0.07)
  );
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}

.jiangnantool_feature-card:hover {
  border-color: rgba(255, 255, 255, 0.17);
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.28);
  transform: translateY(-4px);
}

.jiangnantool_feature-card:hover::before {
  opacity: 1;
}

.jiangnantool_feature-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 26px;
  border: 1px solid rgba(125, 211, 252, 0.18);
  border-radius: 12px;
  background: rgba(56, 189, 248, 0.07);
  color: #8ee7ff;
}

.jiangnantool_feature-card:nth-child(2) .jiangnantool_feature-icon {
  border-color: rgba(165, 180, 252, 0.2);
  background: rgba(99, 102, 241, 0.08);
  color: #b8c1ff;
}

.jiangnantool_feature-card:nth-child(3) .jiangnantool_feature-icon {
  border-color: rgba(216, 180, 254, 0.2);
  background: rgba(168, 85, 247, 0.08);
  color: #e0bcff;
}

.jiangnantool_feature-icon svg {
  width: 21px;
  height: 21px;
}

.jiangnantool_feature-index {
  position: absolute;
  top: 32px;
  right: 30px;
  color: var(--jn-dim);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 10.5px;
  letter-spacing: 0.1em;
}

.jiangnantool_feature-title {
  font-size: 20px;
  font-weight: 650;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.jiangnantool_feature-text {
  margin-top: 10px;
  color: var(--jn-muted);
  font-size: 14px;
  line-height: 1.8;
  text-wrap: pretty;
}

.jiangnantool_feature-tag {
  display: inline-block;
  margin-top: 22px;
  padding: 4px 9px;
  border: 1px solid var(--jn-line);
  border-radius: 6px;
  color: var(--jn-dim);
  font-size: 10.5px;
  line-height: 1.5;
  letter-spacing: 0.02em;
}

/* 适合 / 不适合 */
.jiangnantool_fit {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 18px;
  overflow: hidden;
  border: 1px solid var(--jn-line);
  border-radius: var(--jn-radius);
  background: var(--jn-surface);
}

.jiangnantool_fit-item {
  position: relative;
  padding: 24px 28px 24px 62px;
}

.jiangnantool_fit-item + .jiangnantool_fit-item {
  border-left: 1px solid var(--jn-line);
}

.jiangnantool_fit-icon {
  position: absolute;
  top: 27px;
  left: 26px;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border: 1px solid;
  border-radius: 50%;
}

.jiangnantool_fit-item--yes .jiangnantool_fit-icon {
  border-color: rgba(94, 234, 212, 0.3);
  background: rgba(94, 234, 212, 0.08);
  color: #5eead4;
}

.jiangnantool_fit-item--no .jiangnantool_fit-icon {
  border-color: rgba(251, 191, 36, 0.3);
  background: rgba(251, 191, 36, 0.07);
  color: #fbbf24;
}

.jiangnantool_fit-label {
  display: block;
  margin-bottom: 5px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 10px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.jiangnantool_fit-item--yes .jiangnantool_fit-label {
  color: #7ff0df;
}

.jiangnantool_fit-item--no .jiangnantool_fit-label {
  color: #fcd34d;
}

.jiangnantool_fit-text {
  color: var(--jn-muted);
  font-size: 13.5px;
  line-height: 1.75;
  text-wrap: pretty;
}

/* ============================================================
   使用流程
   ============================================================ */
.jiangnantool_experience-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  gap: 80px;
  align-items: start;
}

.jiangnantool_experience-head {
  position: sticky;
  top: calc(var(--jn-header) + 56px);
  grid-column: 2;
  grid-row: 1;
}

.jiangnantool_experience-head .jiangnantool_section-desc {
  max-width: 520px;
}

.jiangnantool_experience-note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  max-width: 500px;
  margin-top: 28px;
  padding: 15px 17px;
  border: 1px solid rgba(251, 191, 36, 0.16);
  border-radius: 11px;
  background: rgba(251, 191, 36, 0.035);
  color: #b9c1d2;
  font-size: 12.5px;
  line-height: 1.7;
}

.jiangnantool_experience-note .jiangnantool_icon {
  flex: none;
  margin-top: 2px;
  color: #fbbf24;
  opacity: 0.9;
}

.jiangnantool_steps {
  grid-column: 1;
  grid-row: 1;
  border-top: 1px solid var(--jn-line);
}

.jiangnantool_step {
  display: flex;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--jn-line);
}

.jiangnantool_step:first-child {
  padding-top: 26px;
}

.jiangnantool_step-num {
  flex: 0 0 auto;
  min-width: 38px;
  padding-top: 2px;
  color: var(--jn-jade);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 19px;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.03em;
}

@supports ((background-clip: text) or (-webkit-background-clip: text)) {
  .jiangnantool_step-num {
    background: var(--jn-grad-text);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}

.jiangnantool_step-title {
  font-size: 19px;
  font-weight: 650;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.jiangnantool_step-text {
  margin-top: 7px;
  color: var(--jn-muted);
  font-size: 14px;
  line-height: 1.8;
  text-wrap: pretty;
}

/* ============================================================
   常见问题
   ============================================================ */
.jiangnantool_faq-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: 80px;
  align-items: start;
}

.jiangnantool_faq-head {
  position: sticky;
  top: calc(var(--jn-header) + 56px);
}

.jiangnantool_faq-head .jiangnantool_section-desc {
  max-width: 480px;
}

.jiangnantool_faq-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 24px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--jn-line);
  color: #bfe9ee;
  font-size: 13px;
  font-weight: 500;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.jiangnantool_faq-link .jiangnantool_icon {
  transition: transform 0.25s var(--jn-ease);
}

.jiangnantool_faq-link:hover {
  border-color: rgba(125, 211, 252, 0.5);
  color: #ffffff;
}

.jiangnantool_faq-link:hover .jiangnantool_icon {
  transform: translate(2px, -2px);
}

.jiangnantool_faq-list {
  border-top: 1px solid var(--jn-line);
}

.jiangnantool_faq-item {
  border-bottom: 1px solid var(--jn-line);
}

.jiangnantool_faq-heading {
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
}

.jiangnantool_faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  padding: 22px 0;
  color: var(--jn-text);
  text-align: left;
  transition: color 0.2s ease;
}

.jiangnantool_faq-question:hover {
  color: #bff7ee;
}

.jiangnantool_faq-text {
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: -0.005em;
}

.jiangnantool_faq-icon {
  position: relative;
  flex: none;
  width: 30px;
  height: 30px;
  border: 1px solid var(--jn-line);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.015);
  color: var(--jn-muted);
  transition: transform 0.35s var(--jn-ease), background 0.3s ease,
    border-color 0.3s ease, color 0.3s ease;
}

.jiangnantool_faq-icon::before,
.jiangnantool_faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 2px;
  background: currentColor;
  transform: translate(-50%, -50%);
}

.jiangnantool_faq-icon::before {
  width: 11px;
  height: 1.5px;
}

.jiangnantool_faq-icon::after {
  width: 1.5px;
  height: 11px;
}

.jiangnantool_faq-item.jiangnantool_is-open .jiangnantool_faq-icon {
  border-color: rgba(94, 234, 212, 0.32);
  background: rgba(94, 234, 212, 0.08);
  color: #8ff4e4;
  transform: rotate(45deg);
}

.jiangnantool_faq-item.jiangnantool_is-open .jiangnantool_faq-question {
  color: #edf7ff;
}

/* 用 grid-template-rows 0fr → 1fr 做高度动画，无需测量 scrollHeight */
.jiangnantool_faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition: grid-template-rows 0.4s var(--jn-ease), opacity 0.3s ease;
}

.jiangnantool_faq-answer-inner {
  min-height: 0;
  overflow: hidden;
}

.jiangnantool_faq-answer-inner p {
  padding: 0 48px 23px 0;
  color: var(--jn-muted);
  font-size: 14px;
  line-height: 1.85;
  text-wrap: pretty;
  transform: translateY(-5px);
  transition: transform 0.4s var(--jn-ease);
}

.jiangnantool_faq-item.jiangnantool_is-open .jiangnantool_faq-answer {
  grid-template-rows: 1fr;
  opacity: 1;
}

.jiangnantool_faq-item.jiangnantool_is-open .jiangnantool_faq-answer-inner p {
  transform: translateY(0);
}

/* ============================================================
   下载区
   ============================================================ */
.jiangnantool_download {
  padding-top: 20px;
  padding-bottom: 112px;
  overflow: hidden;
}

.jiangnantool_download-panel {
  position: relative;
  padding: 62px 32px 48px;
  overflow: hidden;
  border: 1px solid rgba(125, 211, 252, 0.16);
  border-radius: 26px;
  background: radial-gradient(620px 320px at 50% -12%, rgba(56, 189, 248, 0.16), transparent 66%),
    radial-gradient(420px 300px at 88% 100%, rgba(168, 85, 247, 0.08), transparent 70%),
    linear-gradient(180deg, rgba(22, 27, 40, 0.92), rgba(11, 14, 21, 0.96));
  box-shadow: 0 34px 100px rgba(0, 0, 0, 0.42), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  text-align: center;
  isolation: isolate;
}

/* 1px 渐变描边 */
.jiangnantool_download-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  padding: 1px;
  border-radius: inherit;
  background: linear-gradient(
    128deg,
    rgba(94, 234, 212, 0.5),
    rgba(56, 189, 248, 0.08) 32%,
    rgba(168, 85, 247, 0.38) 70%,
    rgba(94, 234, 212, 0.22)
  );
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
}

.jiangnantool_download-orb {
  position: absolute;
  top: -270px;
  left: 50%;
  z-index: 0;
  width: 540px;
  height: 540px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.22), transparent 66%);
  filter: blur(24px);
  transform: translateX(-50%);
  pointer-events: none;
}

.jiangnantool_download-panel > * {
  position: relative;
  z-index: 1;
}

.jiangnantool_download-logo {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 18px;
  object-fit: cover;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.4), 0 0 26px rgba(56, 189, 248, 0.12);
}

.jiangnantool_download-title {
  max-width: 720px;
  margin-inline: auto;
  font-size: clamp(30px, 3.4vw, 44px);
  font-weight: 650;
  line-height: 1.25;
  letter-spacing: -0.035em;
}

.jiangnantool_download-desc {
  max-width: 570px;
  margin: 16px auto 0;
  color: var(--jn-muted);
  font-size: 15px;
  line-height: 1.8;
  text-wrap: pretty;
}

.jiangnantool_download-btn {
  min-width: 260px;
  margin-top: 30px;
}

.jiangnantool_download-note {
  margin-top: 13px;
  color: var(--jn-dim);
  font-size: 11.5px;
  line-height: 1.6;
}

.jiangnantool_params {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  width: min(100%, 520px);
  margin: 30px auto 0;
  padding-top: 22px;
  border-top: 1px solid var(--jn-line);
}

.jiangnantool_param {
  min-width: 0;
  padding-inline: 8px;
}

.jiangnantool_param + .jiangnantool_param {
  border-left: 1px solid var(--jn-line);
}

.jiangnantool_param dt {
  color: var(--jn-dim);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 9.5px;
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.jiangnantool_param dd {
  margin-top: 6px;
  color: #e8eef9;
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.5;
  white-space: nowrap;
}

.jiangnantool_download-attrs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
  color: var(--jn-dim);
  font-size: 11.5px;
  line-height: 1.6;
}

.jiangnantool_attr-sep {
  color: rgba(255, 255, 255, 0.18);
}

/* ============================================================
   页脚
   ============================================================ */
.jiangnantool_footer {
  padding: 42px 0 26px;
  border-top: 1px solid var(--jn-line);
  background: rgba(7, 9, 13, 0.68);
}

.jiangnantool_footer-top {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 40px;
  align-items: center;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.055);
}

.jiangnantool_footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.jiangnantool_footer-logo {
  width: 32px;
  height: 32px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 9px;
  object-fit: cover;
}

.jiangnantool_footer-brand strong {
  display: block;
  font-size: 13.5px;
  font-weight: 650;
  line-height: 1.5;
}

.jiangnantool_footer-brand span {
  display: block;
  color: var(--jn-dim);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 10.5px;
  line-height: 1.6;
  letter-spacing: 0.03em;
}

.jiangnantool_footer-note {
  max-width: 680px;
  color: var(--jn-muted);
  font-size: 12px;
  line-height: 1.8;
  text-wrap: pretty;
}

.jiangnantool_footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--jn-muted);
  font-size: 12px;
  white-space: nowrap;
}

.jiangnantool_footer-nav a {
  transition: color 0.2s ease;
}

.jiangnantool_footer-nav a:hover {
  color: var(--jn-text);
}

.jiangnantool_footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 19px;
  color: var(--jn-dim);
  font-size: 11px;
  line-height: 1.7;
}

/* ============================================================
   返回顶部
   ============================================================ */
.jiangnantool_backtop {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 70;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--jn-line-strong);
  border-radius: 50%;
  background: rgba(15, 19, 28, 0.86);
  color: var(--jn-muted);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.32);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.25s ease, transform 0.3s var(--jn-ease),
    visibility 0.25s ease, color 0.2s ease, border-color 0.2s ease;
}

@supports ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .jiangnantool_backtop {
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
  }
}

.jiangnantool_backtop.jiangnantool_is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.jiangnantool_backtop:hover {
  border-color: rgba(125, 211, 252, 0.45);
  color: #ffffff;
}

/* ============================================================
   滚动入场（仅 JS 可用时添加类；无 JS 时内容默认可见）
   ============================================================ */
.jiangnantool_reveal {
  transform: translateY(18px);
  transition: transform 0.75s var(--jn-ease);
  transition-delay: var(--jn-reveal-delay, 0ms);
}

.jiangnantool_reveal.jiangnantool_is-visible {
  transform: translateY(0);
}

/* 图片兜底后保证裁切自然 */
.jiangnantool_img--fallback {
  object-fit: cover;
}

/* ============================================================
   动画
   ============================================================ */
@keyframes jiangnantool_pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(94, 234, 212, 0.45);
  }
  70% {
    box-shadow: 0 0 0 7px rgba(94, 234, 212, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(94, 234, 212, 0);
  }
}

@keyframes jiangnantool_glow {
  from {
    opacity: 0.42;
    transform: scale(0.96);
  }
  to {
    opacity: 0.62;
    transform: scale(1.04);
  }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1180px) {
  .jiangnantool_nav {
    gap: 18px;
  }

  .jiangnantool_header-inner {
    gap: 18px;
  }

  .jiangnantool_modules-grid {
    gap: 14px;
  }

  .jiangnantool_module-card {
    padding: 20px;
  }
}

@media (max-width: 1024px) {
  :root {
    --jn-container: calc(100% - 64px);
  }

  .jiangnantool_modules-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .jiangnantool_module-card {
    min-height: 286px;
  }

  .jiangnantool_experience-grid,
  .jiangnantool_faq-inner {
    gap: 48px;
  }
}

@media (max-width: 900px) {
  :root {
    --jn-header: 68px;
  }

  .jiangnantool_nav {
    display: none;
  }

  .jiangnantool_menu-toggle {
    display: flex;
  }

  .jiangnantool_mobile-menu {
    display: block;
  }

  .jiangnantool_header-actions {
    margin-left: auto;
  }

  .jiangnantool_hero {
    padding: 72px 0 76px;
  }

  .jiangnantool_section {
    padding: 84px 0;
  }

  .jiangnantool_section-head--split {
    align-items: flex-start;
    flex-direction: column;
    gap: 20px;
  }

  .jiangnantool_section-head--split > div {
    max-width: none;
  }

  .jiangnantool_preview-hint {
    padding-bottom: 0;
  }

  .jiangnantool_experience-grid,
  .jiangnantool_faq-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .jiangnantool_experience-head,
  .jiangnantool_steps,
  .jiangnantool_faq-head {
    position: static;
    grid-column: auto;
    grid-row: auto;
  }

  .jiangnantool_faq-head {
    max-width: 620px;
  }

  .jiangnantool_experience-head .jiangnantool_section-desc,
  .jiangnantool_faq-head .jiangnantool_section-desc {
    max-width: 640px;
  }

  .jiangnantool_download {
    padding-top: 8px;
    padding-bottom: 90px;
  }

  .jiangnantool_footer-top {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 24px 32px;
  }

  .jiangnantool_footer-nav {
    grid-column: 1 / -1;
  }
}

@media (max-width: 760px) {
  .jiangnantool_feature-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .jiangnantool_feature-card {
    padding: 26px;
  }

  .jiangnantool_feature-index {
    top: 28px;
    right: 26px;
  }

  .jiangnantool_fit {
    grid-template-columns: 1fr;
  }

  .jiangnantool_fit-item + .jiangnantool_fit-item {
    border-top: 1px solid var(--jn-line);
    border-left: 0;
  }

  .jiangnantool_download-panel {
    padding: 48px 24px 40px;
  }
}

@media (max-width: 640px) {
  :root {
    --jn-header: 64px;
    --jn-container: calc(100% - 40px);
  }

  .jiangnantool_page {
    font-size: 15px;
  }

  .jiangnantool_header-inner {
    gap: 10px;
  }

  .jiangnantool_brand {
    gap: 8px;
    font-size: 14px;
  }

  .jiangnantool_brand-logo {
    width: 32px;
    height: 32px;
    border-radius: 9px;
  }

  .jiangnantool_brand-badge {
    display: none;
  }

  .jiangnantool_header-download {
    min-height: 36px;
    padding: 0 12px;
    font-size: 12.5px;
  }

  .jiangnantool_menu-toggle {
    width: 38px;
    height: 38px;
  }

  .jiangnantool_hero {
    padding: 52px 0 60px;
  }

  .jiangnantool_hero::before {
    background-size: 48px 48px;
  }

  .jiangnantool_hero-eyebrow {
    margin-bottom: 24px;
    padding: 6px 11px;
    font-size: 9.5px;
    letter-spacing: 0.13em;
  }

  .jiangnantool_hero-logo-wrap {
    width: 88px;
    height: 88px;
    margin-bottom: 24px;
  }

  .jiangnantool_hero-logo {
    width: 88px;
    height: 88px;
    border-radius: 21px;
  }

  .jiangnantool_hero-logo-wrap::after {
    inset: -5px;
    border-radius: 25px;
  }

  .jiangnantool_hero-logo-badge {
    right: -17px;
    bottom: -6px;
  }

  .jiangnantool_hero-title {
    font-size: clamp(44px, 13vw, 58px);
    letter-spacing: -0.04em;
  }

  .jiangnantool_hero-subtitle {
    margin-top: 12px;
    font-size: 16.5px;
  }

  .jiangnantool_hero-description {
    margin-top: 12px;
    font-size: 14px;
    line-height: 1.8;
  }

  .jiangnantool_hero-actions {
    flex-direction: column;
    gap: 10px;
    width: 100%;
    margin-top: 28px;
  }

  .jiangnantool_hero-actions .jiangnantool_btn {
    width: 100%;
  }

  .jiangnantool_hero-note {
    font-size: 11.5px;
  }

  .jiangnantool_hero-tags {
    gap: 6px;
    margin-top: 24px;
  }

  .jiangnantool_hero-tags li {
    padding: 5px 10px;
    font-size: 11px;
  }

  .jiangnantool_section {
    padding: 64px 0;
  }

  .jiangnantool_section-head {
    margin-bottom: 32px;
  }

  .jiangnantool_section-title {
    font-size: 30px;
  }

  .jiangnantool_section-desc {
    margin-top: 12px;
    font-size: 14px;
    line-height: 1.75;
  }

  .jiangnantool_kicker {
    margin-bottom: 12px;
    font-size: 9.5px;
  }

  .jiangnantool_modules-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .jiangnantool_module-card {
    min-height: 0;
    padding: 22px;
  }

  .jiangnantool_module-top {
    margin-bottom: 24px;
  }

  .jiangnantool_module-text {
    font-size: 13px;
  }

  .jiangnantool_module-meta {
    margin-top: 18px;
    padding-top: 16px;
  }

  .jiangnantool_shot {
    flex: 0 0 216px;
    padding: 8px;
    border-radius: 17px;
  }

  .jiangnantool_shot-caption {
    padding: 11px 5px 4px;
  }

  .jiangnantool_preview-note {
    font-size: 10.5px;
  }

  .jiangnantool_steps {
    grid-column: auto;
  }

  .jiangnantool_step {
    gap: 16px;
    padding: 22px 0;
  }

  .jiangnantool_step-num {
    min-width: 32px;
    font-size: 17px;
  }

  .jiangnantool_step-title {
    font-size: 17px;
  }

  .jiangnantool_step-text {
    font-size: 13px;
  }

  .jiangnantool_faq-question {
    gap: 14px;
    padding: 19px 0;
  }

  .jiangnantool_faq-text {
    font-size: 15px;
  }

  .jiangnantool_faq-icon {
    width: 28px;
    height: 28px;
  }

  .jiangnantool_faq-answer-inner p {
    padding: 0 8px 20px 0;
    font-size: 13px;
  }

  .jiangnantool_download {
    padding-top: 4px;
    padding-bottom: 68px;
  }

  .jiangnantool_download-panel {
    padding: 40px 18px 32px;
    border-radius: 20px;
  }

  .jiangnantool_download-logo {
    width: 62px;
    height: 62px;
    margin-bottom: 16px;
    border-radius: 16px;
  }

  .jiangnantool_download-title {
    font-size: 27px;
  }

  .jiangnantool_download-desc {
    margin-top: 12px;
    font-size: 13px;
  }

  .jiangnantool_download-btn {
    width: 100%;
    min-width: 0;
    margin-top: 26px;
  }

  .jiangnantool_params {
    margin-top: 26px;
    padding-top: 18px;
  }

  .jiangnantool_param {
    padding-inline: 4px;
  }

  .jiangnantool_param dt {
    font-size: 9px;
  }

  .jiangnantool_param dd {
    font-size: 11.5px;
  }

  .jiangnantool_download-attrs {
    gap: 7px;
    margin-top: 20px;
    font-size: 10.5px;
  }

  .jiangnantool_footer {
    padding-top: 32px;
  }

  .jiangnantool_footer-top {
    grid-template-columns: 1fr;
    gap: 18px;
    padding-bottom: 22px;
  }

  .jiangnantool_footer-note {
    font-size: 11.5px;
  }

  .jiangnantool_footer-nav {
    grid-column: auto;
    gap: 16px;
  }

  .jiangnantool_footer-bottom {
    flex-direction: column;
    gap: 6px;
    font-size: 10.5px;
  }

  .jiangnantool_backtop {
    right: 16px;
    bottom: 16px;
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 380px) {
  .jiangnantool_header-inner {
    gap: 8px;
  }

  .jiangnantool_header-actions {
    gap: 6px;
  }

  .jiangnantool_header-download {
    padding: 0 9px;
    font-size: 11.5px;
  }

  .jiangnantool_hero-title {
    font-size: 42px;
  }

  .jiangnantool_param dd {
    font-size: 10.5px;
  }
}

/* ============================================================
   减少动态效果：保留内容与交互，关闭位移动画
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .jiangnantool_hero-logo-glow,
  .jiangnantool_pulse {
    animation: none;
  }

  .jiangnantool_shot,
  .jiangnantool_module-card,
  .jiangnantool_feature-card,
  .jiangnantool_btn {
    transition: none;
  }

  .jiangnantool_shot:hover,
  .jiangnantool_module-card:hover,
  .jiangnantool_feature-card:hover,
  .jiangnantool_btn:hover {
    transform: none;
  }

  .jiangnantool_btn--primary::before {
    display: none;
  }

  .jiangnantool_faq-answer,
  .jiangnantool_faq-answer-inner p {
    transition: none;
  }
}

/* 强制高对比模式：不依赖渐变与颜色区分 */
@media (forced-colors: active) {
  .jiangnantool_hero-title,
  .jiangnantool_step-num {
    background: none;
    color: CanvasText;
  }

  .jiangnantool_btn--primary,
  .jiangnantool_download-panel {
    border: 1px solid ButtonBorder;
  }
}