From 9b4f93bb163c8f129cc644de46d772c31affeb6c Mon Sep 17 00:00:00 2001
From: Yuriy Panov <uriy.panov@gmail.com>
Date: Sat, 29 Aug 2026 11:32:28 +0600
Subject: [PATCH] Redesign the phone layer of the landing
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Three layout bugs and a mobile experience that had no wayfinding.

The `#proposal` section was clipped, not merely cramped: the submit
button carried `whitespace-nowrap` from the shared button base, giving
it a min-content width of 358px, which sized the section's implicit
`auto` grid track to 406px inside a 343px container. `overflow-hidden`
then sliced the copy and every form field off the right edge of a 375px
screen. Fixed at the root — `whitespace-nowrap` moves out of `base` and
into `headerSize`, where buttons are sized by their label — plus an
explicit `grid-cols-[minmax(0,1fr)]` on the section.

The market stat cards put their source line in absolute position against
a guessed min-height, so the longest label ran underneath it. It is in
the flow now, pinned by `mt-auto`.

Below 980px the header nav is not rendered, which left seventeen screens
of scroll with no way to navigate them. The header gives that width back
to the page — logo and call button only — and <ThumbBar /> takes over:
scroll progress, a live section indicator that opens a section sheet,
and one short CTA, hidden over the hero and over the form.

Card rows now say what they are. Rows of unordered peers keep scrolling
sideways and gain a measured segment indicator (<Rail />), replacing the
two prose "swipe sideways" hints. The launch timeline goes the other
way: sideways scrolling hid week 3-5 from someone reading week 1-2, so
below 900px it becomes four disclosures on a spine — which also recovers
the scroll length the taller hero spent.

Below 560px the type scale steps down half a level and the display
tracking opens back up, and the hero photo zooms past `cover` onto the
wave wall, since fitting by height left only ceiling tiles above the
copy.

Also: the route card inside the market section split into two 165px
columns at 760px, so that split now waits for 980px.

Desktop above 980px is unchanged.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
---
 medcenterpersonal/src/App.tsx                 |   3 +
 medcenterpersonal/src/components/Button.tsx   |  14 +-
 .../src/components/EquipmentSection.tsx       |  19 +--
 medcenterpersonal/src/components/Hero.tsx     |  47 +++--
 medcenterpersonal/src/components/Icons.tsx    |  20 ++-
 .../src/components/LaunchSection.tsx          | 120 ++++++++++---
 medcenterpersonal/src/components/Layout.tsx   |  16 --
 medcenterpersonal/src/components/LeadForm.tsx |   2 +-
 .../src/components/MarketSection.tsx          |  38 +++--
 .../src/components/ProgramsSection.tsx        |  12 +-
 .../src/components/ProjectSection.tsx         |  14 +-
 medcenterpersonal/src/components/Rail.tsx     | 128 ++++++++++++++
 .../src/components/RequestSection.tsx         |  11 +-
 .../src/components/ScenariosSection.tsx       |   4 +-
 .../src/components/SiteFooter.tsx             |   3 +-
 .../src/components/SiteHeader.tsx             |  17 +-
 medcenterpersonal/src/components/ThumbBar.tsx | 160 ++++++++++++++++++
 .../src/components/WhyExoSection.tsx          |  11 +-
 medcenterpersonal/src/data/content.ts         |  19 +++
 medcenterpersonal/src/hooks/useMediaQuery.ts  |  22 +++
 .../src/hooks/useReadingPosition.ts           |  54 ++++++
 medcenterpersonal/src/index.css               | 104 ++++++++++++
 22 files changed, 724 insertions(+), 114 deletions(-)
 create mode 100644 medcenterpersonal/src/components/Rail.tsx
 create mode 100644 medcenterpersonal/src/components/ThumbBar.tsx
 create mode 100644 medcenterpersonal/src/hooks/useMediaQuery.ts
 create mode 100644 medcenterpersonal/src/hooks/useReadingPosition.ts

diff --git a/medcenterpersonal/src/App.tsx b/medcenterpersonal/src/App.tsx
index 81fac7b..267937f 100644
--- a/medcenterpersonal/src/App.tsx
+++ b/medcenterpersonal/src/App.tsx
@@ -9,6 +9,7 @@ import { ResidencySection } from './components/ResidencySection'
 import { ScenariosSection } from './components/ScenariosSection'
 import { SiteFooter } from './components/SiteFooter'
 import { SiteHeader } from './components/SiteHeader'
+import { ThumbBar } from './components/ThumbBar'
 import { WhyExoSection } from './components/WhyExoSection'
 
 export default function App() {
@@ -30,6 +31,8 @@ export default function App() {
 
       <ResidencySection />
       <SiteFooter />
+
+      <ThumbBar />
     </>
   )
 }
diff --git a/medcenterpersonal/src/components/Button.tsx b/medcenterpersonal/src/components/Button.tsx
index 509d9d0..e669da1 100644
--- a/medcenterpersonal/src/components/Button.tsx
+++ b/medcenterpersonal/src/components/Button.tsx
@@ -4,10 +4,20 @@ import { cx } from '../lib/cx'
 export type ButtonVariant = 'primary' | 'secondary' | 'call'
 
 const base =
-  'inline-flex cursor-pointer items-center justify-center gap-[10px] rounded-full border border-transparent font-[790] leading-none whitespace-nowrap ' +
+  'inline-flex cursor-pointer items-center justify-center gap-[10px] rounded-full border border-transparent font-[790] leading-none ' +
   'transition-[transform,box-shadow,background-color,border-color] duration-200 hover:-translate-y-[2px] active:translate-y-0 ' +
   '[&>svg]:size-[18px] [&>svg]:shrink-0'
 
+/**
+ * `whitespace-nowrap` belongs on buttons sized by their label, not on every
+ * button. A full-width button whose label cannot wrap reports a min-content
+ * width of its whole label — 358px for «Получить предварительный аудит» — and
+ * that width propagates out through any `auto` grid track around it. That is
+ * what pushed the whole `#proposal` section 47px off a 375px screen and let
+ * `overflow-hidden` slice the copy and the form fields off the right edge.
+ */
+export const nowrap = 'whitespace-nowrap'
+
 /**
  * Sizing gets its own slot rather than living in `base`. Tailwind resolves
  * conflicting utilities by their order in the stylesheet, not by the order they
@@ -18,7 +28,7 @@ const base =
 const defaultSize = 'min-h-[52px] px-[22px]'
 
 /** `.btn--header` — smaller, and tighter still on the narrowest phones. */
-export const headerSize = 'min-h-[44px] px-[17px] text-[13px] phone:px-[14px] phone:text-[12px]'
+export const headerSize = 'min-h-[44px] px-[17px] text-[13px] whitespace-nowrap phone:px-[14px] phone:text-[12px]'
 
 const variants: Record<ButtonVariant, string> = {
   primary:
diff --git a/medcenterpersonal/src/components/EquipmentSection.tsx b/medcenterpersonal/src/components/EquipmentSection.tsx
index a91bc13..42f6dc6 100644
--- a/medcenterpersonal/src/components/EquipmentSection.tsx
+++ b/medcenterpersonal/src/components/EquipmentSection.tsx
@@ -2,7 +2,8 @@ import { devices, equipmentNote } from '../data/content'
 import { useReveal } from '../hooks/useReveal'
 import { cx } from '../lib/cx'
 import { CheckIcon } from './Icons'
-import { Container, ScrollHint, Section, SectionHead } from './Layout'
+import { Container, Section, SectionHead } from './Layout'
+import { Rail } from './Rail'
 
 /**
  * Product shots differ in framing, so the last stylesheet pass in the original
@@ -37,10 +38,12 @@ export function EquipmentSection() {
           lead="Конфигурация подбирается под профиль центра, поток пациентов и задачи врачей. Используем технологическое ядро ЭКЗО без универсального набора и лишнего дублирования."
         />
 
-        <div
-          ref={track.ref}
-          aria-label="Оборудование Экзо Групп"
-          className={cx('scroll-cards auto-cols-[minmax(275px,84%)] gap-[14px] md:grid-still md:grid-cols-3', track.revealClass)}
+        <Rail
+          outerRef={track.ref}
+          wrapperClassName={track.revealClass}
+          tone="dark"
+          label="Оборудование Экзо Групп"
+          className="scroll-cards auto-cols-[minmax(275px,84%)] gap-[14px] md:grid-still md:grid-cols-3"
         >
           {devices.map((device) => (
             <article
@@ -76,11 +79,7 @@ export function EquipmentSection() {
               </div>
             </article>
           ))}
-        </div>
-
-        <ScrollHint tone="dark" className="md:hidden">
-          На мобильном — листайте карточки в сторону
-        </ScrollHint>
+        </Rail>
 
         <div
           ref={note.ref}
diff --git a/medcenterpersonal/src/components/Hero.tsx b/medcenterpersonal/src/components/Hero.tsx
index 346ffd1..55354f8 100644
--- a/medcenterpersonal/src/components/Hero.tsx
+++ b/medcenterpersonal/src/components/Hero.tsx
@@ -13,7 +13,8 @@ export function Hero() {
     <section
       id="top"
       aria-labelledby="hero-title"
-      className="relative isolate flex min-h-[780px] items-end overflow-hidden bg-navy-deep pt-[126px] pb-[48px] text-white lg:min-h-[810px]"
+      className="relative isolate flex min-h-[780px] items-end overflow-hidden bg-navy-deep pt-[126px] pb-[48px] text-white
+        compact:min-h-[660px] compact:pt-[132px] compact:pb-[36px] lg:min-h-[810px]"
     >
       <div
         aria-hidden="true"
@@ -32,33 +33,49 @@ export function Hero() {
 
           <h1 id="hero-title">Физиотерапия с нуля — готовое направление под поток вашего центра</h1>
 
-          <p className="mb-[28px] max-w-[760px] text-[clamp(19px,2vw,24px)] leading-[1.52] text-white/[0.8]">
+          <p className="mb-[28px] max-w-[760px] text-[clamp(19px,2vw,24px)] leading-[1.52] text-white/[0.8] compact:mb-[22px] compact:text-[17px]">
             Проводим аудит клиентской базы и помещения. Проектируем кабинеты, подбираем технологии ЭКЗО, создаём
             клинические маршруты, обучаем команду.
           </p>
 
-          <div className="mb-[34px] flex flex-col items-stretch gap-[12px] sm:flex-row sm:items-center">
+          <div className="mb-[34px] flex flex-col items-stretch gap-[12px] compact:mb-[26px] sm:flex-row sm:items-center">
             <ButtonLink href="#proposal">
               Получить предварительный аудит
               <ArrowRightIcon />
             </ButtonLink>
           </div>
 
+          {/* Two specs and a claim, not three facts. On a phone the third one
+              stops being an orphan on its own row and starts being the point:
+              it is the only number here about money. */}
           <div
             aria-label="Ключевые параметры проекта"
-            className="grid max-w-[760px] grid-cols-3 gap-[10px] phone:grid-cols-2 phone:[&>*:last-child]:col-span-full"
+            className="grid max-w-[760px] grid-cols-3 gap-[10px] phone:grid-cols-2 phone:gap-[9px] phone:[&>*:last-child]:col-span-full"
           >
-            {heroFacts.map((fact) => (
-              <div
-                key={fact.value}
-                className="min-h-[92px] rounded-md border border-white/[0.14] bg-white/[0.08] px-[16px] py-[17px] backdrop-blur-[13px]"
-              >
-                <strong className="mb-[3px] block text-[clamp(20px,3vw,30px)] leading-[1.05] tracking-[-0.03em] [overflow-wrap:anywhere]">
-                  {fact.value}
-                </strong>
-                <span className="block text-[12px] leading-[1.35] text-white/[0.65]">{fact.label}</span>
-              </div>
-            ))}
+            {heroFacts.map((fact, index) => {
+              const claim = index === heroFacts.length - 1
+
+              return (
+                <div
+                  key={fact.value}
+                  className={cx(
+                    'min-h-[92px] rounded-md border border-white/[0.14] bg-white/[0.08] px-[16px] py-[17px] backdrop-blur-[13px]',
+                    'phone:min-h-0 phone:px-[14px] phone:py-[13px]',
+                    claim && 'phone:border-teal/[0.42] phone:bg-teal/[0.11]',
+                  )}
+                >
+                  <strong
+                    className={cx(
+                      'mb-[3px] block text-[clamp(20px,3vw,30px)] leading-[1.05] tracking-[-0.03em] [overflow-wrap:anywhere]',
+                      claim && 'phone:text-[#9FF6EC]',
+                    )}
+                  >
+                    {fact.value}
+                  </strong>
+                  <span className="block text-[12px] leading-[1.35] text-white/[0.65]">{fact.label}</span>
+                </div>
+              )
+            })}
           </div>
 
           <div className="mt-[18px] inline-flex items-center gap-[9px] text-[14px] font-[720] text-[#C8FFF9]">
diff --git a/medcenterpersonal/src/components/Icons.tsx b/medcenterpersonal/src/components/Icons.tsx
index 1534920..d9378d4 100644
--- a/medcenterpersonal/src/components/Icons.tsx
+++ b/medcenterpersonal/src/components/Icons.tsx
@@ -1,9 +1,9 @@
 import type { ReactNode } from 'react'
 
 /** Every icon on the page is a 24×24 outline drawn in `currentColor`. */
-function Icon({ children }: { children: ReactNode }) {
+function Icon({ className, children }: { className?: string; children: ReactNode }) {
   return (
-    <svg aria-hidden="true" viewBox="0 0 24 24" fill="none">
+    <svg aria-hidden="true" viewBox="0 0 24 24" fill="none" className={className}>
       {children}
     </svg>
   )
@@ -25,6 +25,22 @@ export function CheckIcon() {
   )
 }
 
+export function ChevronUpIcon({ className }: { className?: string }) {
+  return (
+    <Icon className={className}>
+      <path d="m6 15 6-6 6 6" stroke="currentColor" strokeLinecap="round" strokeLinejoin="round" strokeWidth="2" />
+    </Icon>
+  )
+}
+
+export function CloseIcon({ className }: { className?: string }) {
+  return (
+    <Icon className={className}>
+      <path d="M6 6l12 12M18 6 6 18" stroke="currentColor" strokeLinecap="round" strokeWidth="2" />
+    </Icon>
+  )
+}
+
 export function PhoneIcon() {
   return (
     <Icon>
diff --git a/medcenterpersonal/src/components/LaunchSection.tsx b/medcenterpersonal/src/components/LaunchSection.tsx
index 306c30a..9814562 100644
--- a/medcenterpersonal/src/components/LaunchSection.tsx
+++ b/medcenterpersonal/src/components/LaunchSection.tsx
@@ -1,11 +1,16 @@
+import { useState } from 'react'
 import { formatNote, formats, timeline } from '../data/content'
+import { useMediaQuery } from '../hooks/useMediaQuery'
 import { useReveal } from '../hooks/useReveal'
 import { cx } from '../lib/cx'
+import { ChevronUpIcon } from './Icons'
 import { Container, Section, SectionHead, SmallNote } from './Layout'
+import { Rail } from './Rail'
 
 export function LaunchSection() {
   const grid = useReveal<HTMLDivElement>()
   const steps = useReveal<HTMLDivElement>()
+  const stacked = useMediaQuery('(max-width: 899px)')
 
   return (
     <Section id="launch" tone="white">
@@ -17,9 +22,11 @@ export function LaunchSection() {
           lead="Вместо хаотичной закупки техники мы внедряем экосистему: совмещаем технологии, настраиваем санитарную логистику, обеспечиваем приватность пациентов и внедряем четкие протоколы работы."
         />
 
-        <div
-          ref={grid.ref}
-          className={cx('scroll-cards auto-cols-[minmax(255px,82%)] gap-[12px] sm:grid-still sm:grid-cols-3', grid.revealClass)}
+        <Rail
+          outerRef={grid.ref}
+          wrapperClassName={grid.revealClass}
+          label="Форматы кабинета"
+          className="scroll-cards auto-cols-[minmax(255px,82%)] gap-[12px] sm:grid-still sm:grid-cols-3"
         >
           {formats.map((format) => (
             <article
@@ -37,41 +44,102 @@ export function LaunchSection() {
               <p className="text-[14px] text-muted">{format.text}</p>
             </article>
           ))}
-        </div>
+        </Rail>
 
         <SmallNote className="mt-[16px]">{formatNote}</SmallNote>
 
-        {/* The timeline breaks into two columns at 900px, not at the shared
-            760px step the rest of the page uses. */}
+        {/* Twelve weeks in order — deliberately not a rail. Sideways scrolling
+            would hide week 3–5 from someone still reading week 1–2, and the
+            order is the whole point of this block. Below 900px the four weeks
+            stack along a teal spine and open one at a time: the sequence stays
+            visible at a glance, and the eighteen bullets underneath it stop
+            costing 2400px of scroll to walk past. */}
         <div
           ref={steps.ref}
           className={cx(
-            'scroll-cards mt-[30px] auto-cols-[minmax(330px,92%)] gap-[14px] min-[900px]:grid-still min-[900px]:grid-cols-2',
+            'mt-[30px] grid grid-cols-[minmax(0,1fr)] gap-[14px]',
+            'relative pl-[26px] before:absolute before:top-[16px] before:bottom-[16px] before:left-[5px] before:w-[2px]',
+            "before:rounded-full before:bg-[linear-gradient(180deg,var(--color-teal),rgb(0_196_180/0.14))] before:content-['']",
+            'min-[900px]:grid-cols-2 min-[900px]:gap-[14px] min-[900px]:pl-0 min-[900px]:before:hidden',
             steps.revealClass,
           )}
         >
-          {timeline.map((step) => (
-            <article
-              key={step.week}
-              className="rounded-[20px] border border-teal/[0.16] bg-ice px-[20px] py-[22px]"
-            >
-              <span className="mb-[8px] block text-[12px] font-black tracking-[0.11em] text-teal-ink uppercase">
-                {step.week}
-              </span>
-              <strong className="mb-[10px] block text-[18px] leading-[1.2] text-navy">{step.title}</strong>
-              <span className="mb-[14px] block text-[13px] leading-[1.55] text-muted italic">{step.lead}</span>
-              <ul className="grid list-disc gap-[8px] pl-[18px] text-[13px] leading-[1.55] text-muted">
-                {step.items.map((item) => (
-                  <li key={item.title}>
-                    <strong className="inline text-[13px] text-navy">{item.title}</strong>
-                    {item.text ? `: ${item.text}` : null}
-                  </li>
-                ))}
-              </ul>
-            </article>
+          {timeline.map((step, index) => (
+            <TimelineStep key={step.week} step={step} defaultOpen={index === 0} collapsible={stacked} />
           ))}
         </div>
       </Container>
     </Section>
   )
 }
+
+/**
+ * One week of the launch plan. A disclosure below 900px, a plain card above it
+ * — the difference is real markup, not a class, because a heading that is a
+ * button on a phone should not stay a button on a desktop where nothing
+ * collapses.
+ */
+function TimelineStep({
+  step,
+  defaultOpen,
+  collapsible,
+}: {
+  step: (typeof timeline)[number]
+  defaultOpen: boolean
+  collapsible: boolean
+}) {
+  const [open, setOpen] = useState(defaultOpen)
+  const expanded = !collapsible || open
+
+  const week = (
+    <span className="block text-[12px] font-black tracking-[0.11em] text-teal-ink uppercase">{step.week}</span>
+  )
+  const title = <strong className="mt-[6px] block text-[17px] leading-[1.2] text-navy">{step.title}</strong>
+
+  return (
+    <article
+      className="relative rounded-[20px] border border-teal/[0.16] bg-ice px-[20px] py-[20px]
+        before:absolute before:top-[26px] before:-left-[26px] before:size-[12px] before:rounded-full before:border-[3px]
+        before:border-white before:bg-teal before:content-[''] min-[900px]:py-[22px] min-[900px]:before:hidden"
+    >
+      {collapsible ? (
+        <button
+          type="button"
+          aria-expanded={open}
+          onClick={() => setOpen((current) => !current)}
+          className="flex w-full cursor-pointer items-start gap-[12px] text-left outline-none focus-visible:rounded-[6px] focus-visible:ring-2 focus-visible:ring-teal"
+        >
+          <span className="min-w-0 flex-1">
+            {week}
+            {title}
+          </span>
+          <ChevronUpIcon
+            className={cx(
+              'mt-[3px] size-[18px] shrink-0 text-teal-ink transition-transform duration-250',
+              open ? 'rotate-0' : 'rotate-180',
+            )}
+          />
+        </button>
+      ) : (
+        <>
+          {week}
+          {title}
+        </>
+      )}
+
+      {expanded ? (
+        <>
+          <span className="mt-[12px] mb-[14px] block text-[13px] leading-[1.55] text-muted italic">{step.lead}</span>
+          <ul className="grid list-disc gap-[8px] pl-[18px] text-[13px] leading-[1.55] text-muted">
+            {step.items.map((item) => (
+              <li key={item.title}>
+                <strong className="inline text-[13px] text-navy">{item.title}</strong>
+                {item.text ? `: ${item.text}` : null}
+              </li>
+            ))}
+          </ul>
+        </>
+      ) : null}
+    </article>
+  )
+}
diff --git a/medcenterpersonal/src/components/Layout.tsx b/medcenterpersonal/src/components/Layout.tsx
index f14b921..3ae45a3 100644
--- a/medcenterpersonal/src/components/Layout.tsx
+++ b/medcenterpersonal/src/components/Layout.tsx
@@ -151,19 +151,3 @@ export function Section({
     </section>
   )
 }
-
-/** `.scroll-hint` — only meaningful while the card row still scrolls sideways. */
-export function ScrollHint({ tone = 'light', className, children }: { tone?: Tone; className?: string; children: ReactNode }) {
-  return (
-    <div
-      aria-hidden="true"
-      className={cx(
-        "mt-[12px] flex items-center gap-[8px] text-[11px] before:h-px before:w-[24px] before:bg-current before:content-['']",
-        tone === 'dark' ? 'text-white/[0.48]' : 'text-muted',
-        className,
-      )}
-    >
-      {children}
-    </div>
-  )
-}
diff --git a/medcenterpersonal/src/components/LeadForm.tsx b/medcenterpersonal/src/components/LeadForm.tsx
index 8ff5e7f..4e9753a 100644
--- a/medcenterpersonal/src/components/LeadForm.tsx
+++ b/medcenterpersonal/src/components/LeadForm.tsx
@@ -73,7 +73,7 @@ export function LeadForm() {
       noValidate
       onSubmit={onSubmit}
       className={cx(
-        'rounded-xl border border-white/[0.14] bg-white/[0.1] p-[clamp(23px,4vw,34px)] shadow-[0_30px_90px_rgb(0_0_0/0.23)] backdrop-blur-[20px]',
+        'min-w-0 rounded-xl border border-white/[0.14] bg-white/[0.1] p-[clamp(23px,4vw,34px)] shadow-[0_30px_90px_rgb(0_0_0/0.23)] backdrop-blur-[20px]',
         revealClass,
       )}
     >
diff --git a/medcenterpersonal/src/components/MarketSection.tsx b/medcenterpersonal/src/components/MarketSection.tsx
index e05282c..6df594f 100644
--- a/medcenterpersonal/src/components/MarketSection.tsx
+++ b/medcenterpersonal/src/components/MarketSection.tsx
@@ -2,6 +2,7 @@ import { marketNotes, marketStats, routeWith, routeWithout } from '../data/conte
 import { useReveal } from '../hooks/useReveal'
 import { cx } from '../lib/cx'
 import { Container, Eyebrow, Section, SectionHead, SmallNote } from './Layout'
+import { Rail } from './Rail'
 
 export function MarketSection() {
   const stats = useReveal<HTMLDivElement>()
@@ -17,39 +18,41 @@ export function MarketSection() {
           lead="Забудьте о расходах на привлечение новых клиентов. Мы встраиваем готовое направление физиотерапии в вашу структуру, превращая лояльную базу пациентов и текущий штат врачей в источник новой прибыли."
         />
 
-        <div className="grid gap-[24px] md:grid-cols-[minmax(0,1.08fr)_minmax(360px,0.92fr)] md:items-stretch">
-          <div
-            ref={stats.ref}
-            className={cx(
-              'scroll-cards auto-cols-[minmax(255px,82%)] gap-[12px] sm:grid-still sm:grid-cols-2',
-              stats.revealClass,
-            )}
+        <div className="grid grid-cols-[minmax(0,1fr)] gap-[24px] md:grid-cols-[minmax(0,1.08fr)_minmax(360px,0.92fr)] md:items-stretch">
+          <Rail
+            outerRef={stats.ref}
+            wrapperClassName={stats.revealClass}
+            label="Рыночные показатели"
+            className="scroll-cards auto-cols-[minmax(255px,82%)] gap-[12px] sm:grid-still sm:grid-cols-2"
           >
             {marketStats.map((stat) => (
+              /* The source line used to be absolutely positioned against the
+                 card's min-height, so the longest label ran underneath it.
+                 It is in the flow now, pinned to the bottom by `mt-auto`. */
               <article
                 key={stat.label}
-                className="relative min-h-[185px] overflow-hidden rounded-lg border border-navy/[0.12] bg-white p-[24px] shadow-[0_16px_48px_rgb(4_29_46/0.06)]
-                  phone:min-h-[172px] phone:p-[20px] sm:min-h-[205px]"
+                className="relative flex min-h-[185px] flex-col overflow-hidden rounded-lg border border-navy/[0.12] bg-white p-[24px] shadow-[0_16px_48px_rgb(4_29_46/0.06)]
+                  phone:min-h-[168px] phone:p-[20px] sm:min-h-[205px]"
               >
                 <span
                   aria-hidden="true"
                   className="teal-bloom-soft absolute -right-[36px] -bottom-[48px] size-[150px] rounded-full"
                 />
-                <strong className="mb-[8px] block text-[clamp(34px,5vw,54px)] leading-none font-[830] tracking-[-0.06em] text-navy">
+                <strong className="relative mb-[8px] block text-[clamp(34px,5vw,54px)] leading-none font-[830] tracking-[-0.06em] text-navy">
                   {stat.value}
                 </strong>
-                <p className="max-w-[240px] text-[14px] leading-[1.45] text-muted">{stat.label}</p>
-                <span className="absolute bottom-[19px] left-[24px] text-[10px] tracking-[0.09em] text-[#7E93A3] uppercase phone:bottom-[15px] phone:left-[20px]">
+                <p className="relative max-w-[240px] text-[14px] leading-[1.45] text-muted">{stat.label}</p>
+                <span className="relative mt-auto pt-[14px] text-[10px] tracking-[0.09em] text-[#7E93A3] uppercase">
                   {stat.source}
                 </span>
               </article>
             ))}
-          </div>
+          </Rail>
 
           <article
             ref={gap.ref}
             className={cx(
-              'gap-card-surface relative grid gap-[16px] overflow-hidden rounded-xl p-[27px] text-white shadow-deep',
+              'gap-card-surface relative grid gap-[16px] overflow-hidden rounded-xl p-[27px] text-white shadow-deep compact:p-[20px]',
               gap.revealClass,
             )}
           >
@@ -60,12 +63,15 @@ export function MarketSection() {
 
             <div className="relative z-1">
               <Eyebrow tone="dark">Исходная точка</Eyebrow>
-              <h3 className="max-w-[600px] text-[clamp(27px,3.5vw,42px)]">
+              <h3 className="max-w-[600px] text-[clamp(27px,3.5vw,42px)] compact:text-[22px] compact:tracking-[-0.02em]">
                 Маршрут пациента: как перестать отдавать прибыль конкурентам.
               </h3>
             </div>
 
-            <div className="relative z-1 grid gap-[12px] md:grid-cols-2">
+            {/* Not `md:` — at 760 the card is already sharing the row with the
+                stats, so splitting it again gives two 165px columns of
+                four-word lines. It waits for 980, where the card is wide. */}
+            <div className="relative z-1 grid gap-[12px] lg:grid-cols-2">
               <RouteColumn sign="—" title="Пока физиотерапии нет" items={routeWithout} />
               <RouteColumn sign="+" title="После запуска направления" items={routeWith} accent />
             </div>
diff --git a/medcenterpersonal/src/components/ProgramsSection.tsx b/medcenterpersonal/src/components/ProgramsSection.tsx
index 3f690b3..5787ccc 100644
--- a/medcenterpersonal/src/components/ProgramsSection.tsx
+++ b/medcenterpersonal/src/components/ProgramsSection.tsx
@@ -1,7 +1,8 @@
 import { programs, routeSteps } from '../data/content'
 import { useReveal } from '../hooks/useReveal'
 import { cx } from '../lib/cx'
-import { Container, Eyebrow, ScrollHint, Section, SectionHead } from './Layout'
+import { Container, Eyebrow, Section, SectionHead } from './Layout'
+import { Rail } from './Rail'
 
 export function ProgramsSection() {
   const route = useReveal<HTMLElement>()
@@ -15,13 +16,14 @@ export function ProgramsSection() {
           lead="Программа связывает врача, технологии, длительность и контроль динамики. Название и состав адаптируются под профиль центра и утверждённую клиническую модель."
         />
 
-        <div className="scroll-cards auto-cols-[minmax(300px,88%)] gap-[14px] sm:auto-cols-[minmax(300px,48%)] md:grid-still md:grid-cols-5">
+        <Rail
+          label="Клинические программы"
+          className="scroll-cards auto-cols-[minmax(300px,88%)] gap-[14px] sm:auto-cols-[minmax(300px,48%)] md:grid-still md:grid-cols-5"
+        >
           {programs.map((program) => (
             <ProgramCard key={program.num} {...program} />
           ))}
-        </div>
-
-        <ScrollHint className="md:hidden">На мобильном — листайте программы</ScrollHint>
+        </Rail>
 
         <aside
           ref={route.ref}
diff --git a/medcenterpersonal/src/components/ProjectSection.tsx b/medcenterpersonal/src/components/ProjectSection.tsx
index e887ea1..ee8d52c 100644
--- a/medcenterpersonal/src/components/ProjectSection.tsx
+++ b/medcenterpersonal/src/components/ProjectSection.tsx
@@ -3,6 +3,7 @@ import { useReveal } from '../hooks/useReveal'
 import { cx } from '../lib/cx'
 import { promiseIcons } from './Icons'
 import { Container, Section, SectionHead, SmallNote } from './Layout'
+import { Rail } from './Rail'
 
 export function ProjectSection() {
   const strip = useReveal<HTMLDivElement>()
@@ -23,12 +24,11 @@ export function ProjectSection() {
           }
         />
 
-        <div
-          ref={strip.ref}
-          className={cx(
-            'scroll-cards mb-[24px] auto-cols-[minmax(255px,82%)] gap-[12px] sm:grid-still sm:mb-[28px] sm:grid-cols-2 md:grid-cols-4',
-            strip.revealClass,
-          )}
+        <Rail
+          outerRef={strip.ref}
+          wrapperClassName={cx('mb-[24px] sm:mb-[28px]', strip.revealClass)}
+          label="Что получает центр"
+          className="scroll-cards auto-cols-[minmax(255px,82%)] gap-[12px] sm:grid-still sm:grid-cols-2 md:grid-cols-4"
         >
           {promises.map((promise) => (
             <article key={promise.title} className="rounded-[20px] border border-navy/[0.12] bg-white p-[22px]">
@@ -39,7 +39,7 @@ export function ProjectSection() {
               <p className="text-[14px] text-muted">{promise.text}</p>
             </article>
           ))}
-        </div>
+        </Rail>
 
         <div
           ref={panel.ref}
diff --git a/medcenterpersonal/src/components/Rail.tsx b/medcenterpersonal/src/components/Rail.tsx
new file mode 100644
index 0000000..3ecf149
--- /dev/null
+++ b/medcenterpersonal/src/components/Rail.tsx
@@ -0,0 +1,128 @@
+import { useEffect, useRef, useState, type ReactNode, type RefObject } from 'react'
+import { cx } from '../lib/cx'
+
+/**
+ * A row of peer cards: scrolls sideways on phones, becomes a plain grid at the
+ * breakpoint the caller sets in `className` (`sm:grid-still` / `md:grid-still`).
+ *
+ * Only rows whose cards are unordered peers belong here. Sequences — the launch
+ * timeline, the patient route — stay stacked, because sideways scrolling hides
+ * step two from someone still reading step one.
+ *
+ * The segmented indicator underneath measures the row instead of guessing from
+ * a breakpoint, so it appears exactly when the sideways gesture exists and
+ * disappears the moment the row turns back into a grid.
+ */
+export function Rail({
+  label,
+  tone = 'light',
+  className,
+  wrapperClassName,
+  outerRef,
+  children,
+}: {
+  label?: string
+  tone?: 'light' | 'dark'
+  /** Classes for the scrolling row itself. */
+  className?: string
+  /** Classes for the wrapper that holds the row and the indicator. */
+  wrapperClassName?: string
+  outerRef?: RefObject<HTMLDivElement | null>
+  children: ReactNode
+}) {
+  const rowRef = useRef<HTMLDivElement>(null)
+  const [{ index, count }, setPosition] = useState({ index: 0, count: 0 })
+
+  useEffect(() => {
+    const row = rowRef.current
+    if (!row) return
+
+    const measure = () => {
+      /* `count: 0` hides the indicator — the row is a grid at this width. */
+      if (row.scrollWidth - row.clientWidth < 4) {
+        setPosition((current) => (current.count === 0 ? current : { index: 0, count: 0 }))
+        return
+      }
+
+      const cards = Array.from(row.children) as HTMLElement[]
+      const middle = row.getBoundingClientRect().left + row.clientWidth / 2
+      let nearest = 0
+      let shortest = Infinity
+
+      cards.forEach((card, position) => {
+        const box = card.getBoundingClientRect()
+        const distance = Math.abs(box.left + box.width / 2 - middle)
+        if (distance < shortest) {
+          shortest = distance
+          nearest = position
+        }
+      })
+
+      setPosition((current) =>
+        current.index === nearest && current.count === cards.length
+          ? current
+          : { index: nearest, count: cards.length },
+      )
+    }
+
+    measure()
+    row.addEventListener('scroll', measure, { passive: true })
+
+    const observer = new ResizeObserver(measure)
+    observer.observe(row)
+
+    return () => {
+      row.removeEventListener('scroll', measure)
+      observer.disconnect()
+    }
+  }, [])
+
+  const goTo = (position: number) => {
+    const row = rowRef.current
+    const card = row?.children[position] as HTMLElement | undefined
+    if (!row || !card) return
+
+    /* 16px is the row's own inline padding — the resting offset of card one. */
+    row.scrollBy({
+      left: card.getBoundingClientRect().left - row.getBoundingClientRect().left - 16,
+      behavior: 'smooth',
+    })
+  }
+
+  return (
+    <div ref={outerRef} className={wrapperClassName}>
+      <div ref={rowRef} aria-label={label} className={className}>
+        {children}
+      </div>
+
+      {count > 1 ? (
+        <div className="mt-[2px] flex items-center gap-[7px]">
+          {Array.from({ length: count }, (_, position) => (
+            <button
+              key={position}
+              type="button"
+              aria-label={`Показать карточку ${position + 1} из ${count}`}
+              aria-current={position === index}
+              onClick={() => goTo(position)}
+              className="flex h-[22px] cursor-pointer items-center rounded-full outline-none focus-visible:ring-2 focus-visible:ring-teal"
+            >
+              <span
+                className={cx(
+                  'block h-[4px] rounded-full transition-[width,background-color] duration-300',
+                  position === index ? 'w-[28px]' : 'w-[10px]',
+                  tone === 'dark'
+                    ? position === index
+                      ? 'bg-teal-bright'
+                      : 'bg-white/[0.22]'
+                    : position === index
+                      ? 'bg-teal'
+                      : 'bg-navy/[0.16]',
+                )}
+              />
+            </button>
+          ))}
+        </div>
+      ) : null}
+    </div>
+  )
+}
diff --git a/medcenterpersonal/src/components/RequestSection.tsx b/medcenterpersonal/src/components/RequestSection.tsx
index 321c351..2d71667 100644
--- a/medcenterpersonal/src/components/RequestSection.tsx
+++ b/medcenterpersonal/src/components/RequestSection.tsx
@@ -10,10 +10,15 @@ export function RequestSection() {
 
   return (
     <section id="proposal" className="cta-surface relative overflow-hidden py-[clamp(72px,9vw,120px)] text-white">
-      <Container className="relative grid items-center gap-[30px] md:grid-cols-[minmax(0,1fr)_minmax(430px,0.83fr)]">
-        <div ref={copy.ref} className={cx(copy.revealClass)}>
+      {/* `grid-cols-[minmax(0,1fr)]` is load-bearing: an implicit `auto` track
+          takes its minimum from the widest thing inside it, so anything in the
+          form that cannot wrap sets the width of the whole section. */}
+      <Container className="relative grid grid-cols-[minmax(0,1fr)] items-center gap-[30px] md:grid-cols-[minmax(0,1fr)_minmax(430px,0.83fr)]">
+        <div ref={copy.ref} className={cx('min-w-0', copy.revealClass)}>
           <Eyebrow tone="dark">Следующий шаг</Eyebrow>
-          <h2 className="text-[clamp(39px,6vw,68px)]">Запустим физиотерапию с нуля под ваш поток</h2>
+          <h2 className="text-[clamp(39px,6vw,68px)] compact:text-[32px] compact:tracking-[-0.035em]">
+            Запустим физиотерапию с нуля под ваш поток
+          </h2>
           <SectionLead tone="dark">
             Оставьте контакты — специалист уточнит профиль центра, пациентский поток и доступные помещения, после чего
             подготовит предварительную концепцию, конфигурацию и финансовую модель направления.
diff --git a/medcenterpersonal/src/components/ScenariosSection.tsx b/medcenterpersonal/src/components/ScenariosSection.tsx
index 2351907..7446f7c 100644
--- a/medcenterpersonal/src/components/ScenariosSection.tsx
+++ b/medcenterpersonal/src/components/ScenariosSection.tsx
@@ -20,10 +20,10 @@ export function ScenariosSection() {
           Сценарии выручки
         </p>
 
-        <h2 className="mb-[10px] max-w-[980px] text-[clamp(32px,4.8vw,56px)] leading-[1.04] tracking-[-0.04em]">
+        <h2 className="mb-[10px] max-w-[980px] text-[clamp(32px,4.8vw,56px)] leading-[1.04] tracking-[-0.04em] compact:text-[29px] compact:tracking-[-0.03em]">
           Даже умеренная загрузка кабинета даёт понятную выручку
         </h2>
-        <p className="mb-[34px] max-w-[900px] text-[clamp(17px,1.8vw,21px)] leading-[1.55] text-white/[0.72]">
+        <p className="mb-[34px] max-w-[900px] text-[clamp(17px,1.8vw,21px)] leading-[1.55] text-white/[0.72] compact:mb-[26px]">
           Модель считается просто: количество оплаченных курсов × средний чек курса. Дальше на аудите добавляем расходы и
           срок окупаемости.
         </p>
diff --git a/medcenterpersonal/src/components/SiteFooter.tsx b/medcenterpersonal/src/components/SiteFooter.tsx
index 2ecd8d5..23525fa 100644
--- a/medcenterpersonal/src/components/SiteFooter.tsx
+++ b/medcenterpersonal/src/components/SiteFooter.tsx
@@ -4,7 +4,8 @@ import { Container } from './Layout'
 
 export function SiteFooter() {
   return (
-    <footer className="bg-footer py-[26px] text-[12px] text-white/[0.52]">
+    /* The extra bottom padding below 980px is the landing strip for <ThumbBar />. */
+    <footer className="bg-footer py-[26px] pb-[96px] text-[12px] text-white/[0.52] lg:pb-[26px]">
       <Container className="grid gap-[14px] md:grid-cols-[220px_1fr]">
         <div className="flex max-w-[180px] shrink-0 items-center">
           <img
diff --git a/medcenterpersonal/src/components/SiteHeader.tsx b/medcenterpersonal/src/components/SiteHeader.tsx
index 677c4f5..4b83a91 100644
--- a/medcenterpersonal/src/components/SiteHeader.tsx
+++ b/medcenterpersonal/src/components/SiteHeader.tsx
@@ -6,14 +6,20 @@ import { ButtonLink, buttonClass, headerSize } from './Button'
 import { PhoneIcon } from './Icons'
 import { Container } from './Layout'
 
-/** Transparent over the hero; gains the blurred bar once the page scrolls. */
+/**
+ * Transparent over the hero; gains the blurred bar once the page scrolls.
+ *
+ * Below 980px it carries a logo and a call button and nothing else. The nav is
+ * not shown at that width and the proposal button has moved to <ThumbBar />,
+ * so there is nothing left up here to compete with the page.
+ */
 export function SiteHeader() {
   const scrolled = useScrolled()
 
   return (
     <header
       className={cx(
-        'fixed inset-x-0 top-0 z-[60] py-[14px] transition-[background-color,box-shadow,backdrop-filter] duration-250',
+        'fixed inset-x-0 top-0 z-[60] py-[14px] transition-[background-color,box-shadow,backdrop-filter] duration-250 phone:py-[9px]',
         scrolled && 'bg-navy-deep/[0.88] shadow-[0_12px_42px_rgb(3_20_34/0.18)] backdrop-blur-[18px]',
       )}
     >
@@ -43,12 +49,15 @@ export function SiteHeader() {
           <a
             href={contacts.phoneHref}
             aria-label="Позвонить в Экзо Групп"
-            className={buttonClass('call', 'phone:px-[12px] [&>svg]:phone:size-[18px]', headerSize)}
+            className={buttonClass('call', 'phone:min-h-[40px] phone:px-[13px] [&>svg]:phone:size-[18px]', headerSize)}
           >
             <PhoneIcon />
             <span className="phone:hidden">Звонок</span>
           </a>
-          <ButtonLink href="#proposal" size={headerSize}>
+          {/* `max-lg:hidden`, not `hidden lg:inline-flex`: `inline-flex` from
+              the button base is emitted after `hidden` in the utility layer and
+              would win at every width. */}
+          <ButtonLink href="#proposal" className="max-lg:hidden" size={headerSize}>
             Получить предложение
           </ButtonLink>
         </div>
diff --git a/medcenterpersonal/src/components/ThumbBar.tsx b/medcenterpersonal/src/components/ThumbBar.tsx
new file mode 100644
index 0000000..0f9fd01
--- /dev/null
+++ b/medcenterpersonal/src/components/ThumbBar.tsx
@@ -0,0 +1,160 @@
+import { useEffect, useRef, useState } from 'react'
+import { contacts, sectionNav } from '../data/content'
+import { useReadingPosition } from '../hooks/useReadingPosition'
+import { cx } from '../lib/cx'
+import { ChevronUpIcon, CloseIcon, PhoneIcon } from './Icons'
+
+const hrefs = sectionNav.map((section) => section.href)
+
+/**
+ * Wayfinding and the one call to action, moved to the thumb — below 980px,
+ * which is exactly where the header nav stops being rendered.
+ *
+ * The page runs to seventeen screens on a phone. What a reader needs there is
+ * "where am I" and "how do I ask", and until now the top of the screen carried
+ * neither: it carried a logo and a button, pinned over the content the whole
+ * way down. The header gives that width back to the page; this takes over.
+ */
+export function ThumbBar() {
+  const { index, progress } = useReadingPosition(hrefs)
+  const [open, setOpen] = useState(false)
+  const triggerRef = useRef<HTMLButtonElement>(null)
+
+  const current = sectionNav[index]
+
+  /* Hidden over the hero, which has its own call to action, and again over the
+     form, where the bar would sit on top of the submit button. */
+  const visible = index > 0 && current.href !== '#proposal'
+
+  useEffect(() => {
+    if (!open) return
+
+    const onKeyDown = (event: KeyboardEvent) => {
+      if (event.key === 'Escape') setOpen(false)
+    }
+
+    const { overflow } = document.body.style
+    document.body.style.overflow = 'hidden'
+    window.addEventListener('keydown', onKeyDown)
+
+    return () => {
+      document.body.style.overflow = overflow
+      window.removeEventListener('keydown', onKeyDown)
+    }
+  }, [open])
+
+  const close = () => {
+    setOpen(false)
+    triggerRef.current?.focus()
+  }
+
+  return (
+    <>
+      <div
+        className={cx(
+          'fixed inset-x-0 bottom-0 z-70 transition-[transform,opacity] duration-300 lg:hidden',
+          visible ? 'translate-y-0 opacity-100' : 'pointer-events-none translate-y-full opacity-0',
+        )}
+      >
+        <div className="border-t border-white/[0.1] bg-navy-deep/[0.93] backdrop-blur-[20px]">
+          <div aria-hidden="true" className="h-[2px] bg-white/[0.08]">
+            <i className="block h-full bg-teal transition-[width] duration-150" style={{ width: `${progress * 100}%` }} />
+          </div>
+
+          <div className="mx-auto flex w-[min(calc(100%_-_24px),var(--container-page))] items-center gap-[10px] py-[10px]">
+            <button
+              ref={triggerRef}
+              type="button"
+              aria-expanded={open}
+              aria-haspopup="dialog"
+              onClick={() => setOpen(true)}
+              className="flex min-w-0 flex-1 cursor-pointer items-center gap-[10px] rounded-[16px] border border-white/[0.14] bg-white/[0.06]
+                px-[13px] py-[8px] text-left transition-[background-color,border-color] duration-200 outline-none
+                hover:bg-white/[0.1] focus-visible:border-teal focus-visible:ring-2 focus-visible:ring-teal/[0.4]"
+            >
+              <span className="min-w-0">
+                <span className="block text-[10px] leading-[1.4] font-[850] tracking-[0.13em] text-teal uppercase">
+                  Раздел {index + 1} / {sectionNav.length}
+                </span>
+                <span className="block truncate text-[14px] font-[760] text-white">{current.label}</span>
+              </span>
+              <ChevronUpIcon className="ml-auto size-[18px] shrink-0 text-white/[0.5]" />
+            </button>
+
+            <a
+              href="#proposal"
+              className="inline-flex min-h-[46px] shrink-0 cursor-pointer items-center rounded-full bg-teal px-[18px] text-[14px]
+                font-[790] text-navy shadow-[0_12px_32px_rgb(0_196_180/0.28)] transition-colors duration-200 hover:bg-teal-bright"
+            >
+              Получить аудит
+            </a>
+          </div>
+        </div>
+      </div>
+
+      {open ? (
+        <div className="fixed inset-0 z-80 lg:hidden" role="dialog" aria-modal="true" aria-label="Разделы страницы">
+          <button
+            type="button"
+            aria-label="Закрыть список разделов"
+            onClick={close}
+            className="veil-in absolute inset-0 size-full cursor-pointer bg-navy-deep/[0.66] backdrop-blur-[3px]"
+          />
+
+          <div
+            className="sheet-in absolute inset-x-0 bottom-0 max-h-[86vh] overflow-y-auto rounded-t-[26px] border-t border-white/[0.12]
+              bg-navy-deep px-[16px] pt-[12px] pb-[20px] shadow-[0_-24px_60px_rgb(3_20_34/0.5)]"
+          >
+            <div className="mb-[14px] flex items-center justify-between">
+              <span className="text-[11px] font-[850] tracking-[0.14em] text-teal uppercase">Разделы страницы</span>
+              <button
+                type="button"
+                onClick={close}
+                aria-label="Закрыть"
+                className="grid size-[34px] cursor-pointer place-items-center rounded-full border border-white/[0.14] text-white/[0.6]
+                  transition-colors duration-200 hover:text-white"
+              >
+                <CloseIcon className="size-[16px]" />
+              </button>
+            </div>
+
+            <nav className="grid gap-[2px]">
+              {sectionNav.map((section, position) => (
+                <a
+                  key={section.href}
+                  href={section.href}
+                  onClick={close}
+                  aria-current={position === index ? 'true' : undefined}
+                  className={cx(
+                    'flex items-center gap-[14px] rounded-[14px] px-[13px] py-[12px] text-[15px] transition-colors duration-200',
+                    position === index ? 'bg-white/[0.09] font-[780] text-white' : 'text-white/[0.66] hover:text-white',
+                  )}
+                >
+                  <span
+                    className={cx(
+                      'w-[18px] shrink-0 text-[11px] font-[820] tabular-nums',
+                      position === index ? 'text-teal' : 'text-white/[0.34]',
+                    )}
+                  >
+                    {String(position + 1).padStart(2, '0')}
+                  </span>
+                  {section.label}
+                </a>
+              ))}
+            </nav>
+
+            <a
+              href={contacts.phoneHref}
+              className="mt-[14px] flex min-h-[52px] items-center justify-center gap-[10px] rounded-[16px] border border-white/[0.16]
+                bg-white/[0.07] text-[15px] font-[760] text-white transition-colors duration-200 hover:bg-white/[0.12]
+                [&>svg]:size-[18px]"
+            >
+              <PhoneIcon />
+              {contacts.phone}
+            </a>
+          </div>
+        </div>
+      ) : null}
+    </>
+  )
+}
diff --git a/medcenterpersonal/src/components/WhyExoSection.tsx b/medcenterpersonal/src/components/WhyExoSection.tsx
index f0b0a93..72e9e38 100644
--- a/medcenterpersonal/src/components/WhyExoSection.tsx
+++ b/medcenterpersonal/src/components/WhyExoSection.tsx
@@ -4,6 +4,7 @@ import { useReveal } from '../hooks/useReveal'
 import { cx } from '../lib/cx'
 import { whyIcons } from './Icons'
 import { Container, Section, SectionHead, SmallNote } from './Layout'
+import { Rail } from './Rail'
 
 export function WhyExoSection() {
   const photo = useReveal<HTMLDivElement>()
@@ -41,9 +42,11 @@ export function WhyExoSection() {
           </div>
 
           <div className="min-w-0">
-            <div
-              ref={list.ref}
-              className={cx('scroll-cards auto-cols-[minmax(280px,84%)] gap-[10px] md:grid-still', list.revealClass)}
+            <Rail
+              outerRef={list.ref}
+              wrapperClassName={list.revealClass}
+              label="Почему Экзо Групп"
+              className="scroll-cards auto-cols-[minmax(280px,84%)] gap-[10px] md:grid-still"
             >
               {whyItems.map((item) => (
                 <div
@@ -59,7 +62,7 @@ export function WhyExoSection() {
                   </div>
                 </div>
               ))}
-            </div>
+            </Rail>
 
             <div ref={stats.ref} className={cx('mt-[18px] grid grid-cols-2 gap-[10px] md:grid-cols-4', stats.revealClass)}>
               {companyStats.map((stat) => (
diff --git a/medcenterpersonal/src/data/content.ts b/medcenterpersonal/src/data/content.ts
index 8bdf1ed..613854a 100644
--- a/medcenterpersonal/src/data/content.ts
+++ b/medcenterpersonal/src/data/content.ts
@@ -18,6 +18,25 @@ export const navLinks = [
   { href: '#launch', label: 'Запуск' },
 ]
 
+/**
+ * Every section, in reading order — the list behind the thumb bar below 980px,
+ * where the header nav above is not shown. It is longer than `navLinks` on
+ * purpose: the four header links are a summary for a reader who can see the
+ * whole page at once, this is a map for one scrolling through seventeen
+ * screens of it.
+ */
+export const sectionNav = [
+  { href: '#top', label: 'Начало' },
+  { href: '#market', label: 'Почему сейчас' },
+  { href: '#financial-scenarios', label: 'Сценарии выручки' },
+  { href: '#project', label: 'Что запускаем' },
+  { href: '#programs', label: 'Курсовая модель' },
+  { href: '#technology', label: 'Технологии' },
+  { href: '#launch', label: 'Запуск' },
+  { href: '#why-exo', label: 'Почему Экзо' },
+  { href: '#proposal', label: 'Заявка на аудит' },
+]
+
 /* -------------------------------------------------------------------------- */
 /* Первый экран                                                               */
 /* -------------------------------------------------------------------------- */
diff --git a/medcenterpersonal/src/hooks/useMediaQuery.ts b/medcenterpersonal/src/hooks/useMediaQuery.ts
new file mode 100644
index 0000000..97567ea
--- /dev/null
+++ b/medcenterpersonal/src/hooks/useMediaQuery.ts
@@ -0,0 +1,22 @@
+import { useEffect, useState } from 'react'
+
+/**
+ * For the few places where a phone needs different markup, not just different
+ * classes — the launch timeline, which becomes a set of disclosures rather
+ * than four full-height cards. `query` must be a literal, not a computed
+ * string.
+ */
+export function useMediaQuery(query: string) {
+  const [matches, setMatches] = useState(false)
+
+  useEffect(() => {
+    const list = window.matchMedia(query)
+    const onChange = () => setMatches(list.matches)
+
+    onChange()
+    list.addEventListener('change', onChange)
+    return () => list.removeEventListener('change', onChange)
+  }, [query])
+
+  return matches
+}
diff --git a/medcenterpersonal/src/hooks/useReadingPosition.ts b/medcenterpersonal/src/hooks/useReadingPosition.ts
new file mode 100644
index 0000000..4091682
--- /dev/null
+++ b/medcenterpersonal/src/hooks/useReadingPosition.ts
@@ -0,0 +1,54 @@
+import { useEffect, useState } from 'react'
+
+/**
+ * Which section the reader is currently in, plus how far through the page they
+ * are. Driven by scroll position rather than by an IntersectionObserver: every
+ * section here is taller than a phone viewport, so the question is not "is this
+ * visible" but "which one is under the reading line", and a threshold-based
+ * observer cannot answer that.
+ *
+ * `hrefs` must be a stable array — pass a module-level constant.
+ */
+export function useReadingPosition(hrefs: readonly string[]) {
+  const [index, setIndex] = useState(0)
+  const [progress, setProgress] = useState(0)
+
+  useEffect(() => {
+    let frame = 0
+
+    const measure = () => {
+      frame = 0
+
+      /* A third of the way down the screen: the line the eye actually reads
+         from, not the very top edge. */
+      const line = window.scrollY + window.innerHeight * 0.3
+      let current = 0
+
+      hrefs.forEach((href, position) => {
+        const element = document.querySelector(href)
+        if (element && element.getBoundingClientRect().top + window.scrollY <= line) current = position
+      })
+
+      const scrollable = document.documentElement.scrollHeight - window.innerHeight
+
+      setIndex(current)
+      setProgress(scrollable > 0 ? Math.min(1, window.scrollY / scrollable) : 0)
+    }
+
+    const onScroll = () => {
+      if (!frame) frame = requestAnimationFrame(measure)
+    }
+
+    measure()
+    window.addEventListener('scroll', onScroll, { passive: true })
+    window.addEventListener('resize', onScroll)
+
+    return () => {
+      window.removeEventListener('scroll', onScroll)
+      window.removeEventListener('resize', onScroll)
+      if (frame) cancelAnimationFrame(frame)
+    }
+  }, [hrefs])
+
+  return { index, progress }
+}
diff --git a/medcenterpersonal/src/index.css b/medcenterpersonal/src/index.css
index 1ffa2bb..ca2dcfe 100644
--- a/medcenterpersonal/src/index.css
+++ b/medcenterpersonal/src/index.css
@@ -274,6 +274,110 @@
   }
 }
 
+/* ---------------------------------------------------------------------------
+   Phone.
+
+   The scale above is a display scale. At 375px every level of it collapses
+   onto the same note — a 42px h1 and a 34px h2 set at display tracking, one
+   after another for seventeen screens, all shouting equally. Below 560px the
+   whole page steps down half a level and the tracking opens back up (-0.055em
+   closes Cyrillic counters at 38px in a way it never does at 84px), so the
+   figures the argument actually rests on — 2,41, +63%, 2,70 млн ₽ — are left
+   as the loudest thing on the page.
+--------------------------------------------------------------------------- */
+@media (max-width: 560px) {
+  :root {
+    --spacing-section: 54px;
+    --spacing-section-compact: 46px;
+  }
+
+  /* The phone header is 62px tall, not 78px. */
+  section[id] {
+    scroll-margin-top: 66px;
+  }
+
+  h1 {
+    margin-bottom: 18px;
+    font-size: 38px;
+    line-height: 1;
+    letter-spacing: -0.035em;
+    /* `balance` is for two or three lines. Over five it starts trimming lines
+       to lengths it likes and leaves a ragged right edge instead of a filled
+       column. */
+    text-wrap: normal;
+  }
+
+  h2 {
+    margin-bottom: 14px;
+    font-size: 29px;
+    line-height: 1.06;
+    letter-spacing: -0.03em;
+  }
+
+  h3 {
+    font-size: 19px;
+    letter-spacing: -0.02em;
+  }
+}
+
+@layer components {
+  /* The hero scrim runs left-to-right, which on a 375px screen means it runs
+     across the whole photo: the image is paid for and then buried. On phones
+     it turns vertical instead, so the equipment reads across the top third and
+     the copy sits on solid ground below it. */
+  @media (max-width: 560px) {
+    .hero-scrim {
+      background: linear-gradient(
+        180deg,
+        /* The header is transparent over the hero and its logo is white; the
+           wave wall behind it is cream. This first stop is what keeps it
+           readable. */ rgb(4 24 41 / 0.82) 0%,
+        rgb(4 24 41 / 0.3) 12%,
+        rgb(4 24 41 / 0.34) 22%,
+        rgb(4 24 41 / 0.62) 34%,
+        rgb(5 28 47 / 0.93) 54%,
+        rgb(4 22 37 / 0.99) 100%
+      );
+    }
+
+    /* At 375px `cover` fits the photo by height, so the only part left above
+       the copy is the strip the room happens to put at the top — ceiling
+       tiles. Zooming past cover and dropping the frame lands the backlit wave
+       wall in that strip instead, which is the one thing in this photo worth
+       showing at 110px tall. */
+    .hero-photo {
+      background-size: auto 150%;
+      background-position: 55% 72%;
+    }
+
+    /* Room for the rail indicator that replaced the "swipe sideways" hints. */
+    .scroll-cards {
+      padding-bottom: 12px;
+    }
+  }
+
+  @keyframes sheet-in {
+    from {
+      transform: translateY(16px);
+      opacity: 0;
+    }
+  }
+
+  @keyframes veil-in {
+    from {
+      opacity: 0;
+    }
+  }
+
+  .sheet-in {
+    animation: sheet-in 0.26s cubic-bezier(0.2, 0.7, 0.3, 1);
+  }
+
+  .veil-in {
+    animation: veil-in 0.2s ease;
+  }
+}
+
 /* Turns a `.scroll-cards` row back into an ordinary grid. Applied with a
    breakpoint prefix, because sections switch over at different widths. */
 @utility grid-still {